A turret (100) is configured to adjust a position of an alignment stage (502) coupled to the turret. The turret can include an adjustment knob (lOl)configured to be actuatable in a plurality of adjustment directions to adjust the position of the alignment stage. The turret can further include a lock configured to prevent movement of the adjustment knob in the plurality of adjustment directions. The adjustment knob can be configured to be actuatable to transition the adjustment knob between a locked state in which the lock is engaged and an unlocked state in which the lock is released. With the adjustment knob in the unlocked state, the adjustment knob is actuatable in the plurality of adjustment directions.
A system for retaining an optical member about a mount can comprise a mount, an optical member having a first end and a second end, a primary retention system operable to secure the second end of the optical member to the mount, and a secondary retention system operable to secure the second end of the optical member to the mount. The secondary retention system can comprise a mount retention groove formed in the mount, an optical member retention groove formed in the optical member, the mount retention groove in the mount and the optical member retention groove in the optical member forming a retention channel upon the optical member being secured to the mount via the primary retention system, and a retention wire disposed within the retention channel. The secondary retention system activates to cause the retention wire to engage the mount retention groove of the mount and the optical member retention groove of the optical member upon movement of the optical member and at least partial failure of the primary retention system to retain the optical mount securely coupled to the mount.
A variable magnification optical system with boresight error correction includes a focusing lens to receive light along an optical axis of the variable magnification optical system, with the focusing lens configured to create an image of a target at a focal plane. The system includes a magnification changer disposed along the optical axis, with the magnification changer including an optomechanical drive system to adjust an optical magnification setting of one or more zoom lenses. The system also includes a light source configured to emit a pilot beam into the magnification changer. The system includes a position sensitive photodetector configured to receive the pilot beam exiting the magnification changer. The system further includes a microdisplay optically conjugate to the focal plane, with the microdisplay configured to impose an image of an electronic reticle on the focal plane based on the position of the pilot beam relative to the position sensitive photodetector.
G02B 7/04 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
F41G 1/38 - Telescopic sights specially adapted for smallarms or ordnance; Supports or mountings therefor
G02B 23/00 - Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
4.
COMPACT ZOOM RELAY SYSTEM AND METHOD WITH VARIFOCAL FREEFORM LENS
A zoom relay system includes an optical element for receiving light from an object. The zoom relay system is adapted to generate an image of the object on an image plane. The system includes a single varifocal lens group positioned along an optical axis. The varifocal lens group includes at least one lens for providing magnification and a varifocal freeform lens including two lens plates. The lens plates are configured to be disposed along a dimension transverse to the optical axis, such that, when the varifocal lens group is moved along the optical axis to adjust the magnification, the lens plates of the varifocal freeform lens are displaced in the transverse dimension relative to each other to provide compensation, such that, when the magnification is changed, a distance between the object and the image plane remains constant.
G02B 7/04 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
F41G 1/38 - Telescopic sights specially adapted for smallarms or ordnance; Supports or mountings therefor
G02B 7/10 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
G02B 23/00 - Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
An optical system with adjustable eye relief includes a relay lens assembly. The relay lens assembly is defined by a collimating lens and a focusing lens. The optical system includes an aperture stop. The aperture stop is configured to shift axially along an optical axis between the collimating lens and the focusing lens. The optical system also includes an afocal lens assembly. The afocal lens assembly is defined by the focusing lens and an eyepiece. Additionally, an axial shift of the aperture stop along the optical axis between the collimating lens and the focusing lens changes an eye relief of the eyepiece based on a transverse magnification of the afocal lens assembly.
G02B 23/00 - Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
A digital booster for an optical system includes an image acquisition unit. The image acquisition unit is configured to acquire an image frame from a non-magnified optic. The image frame includes an aiming reticle imposed by the non-magnified optic. The digital booster includes a display and a processor. The processor is configured to locate the aiming reticle on the image frame, select a sub-frame of the image frame with an aspect ratio that is centered on the aiming reticle of the image frame, perform image inversion and rescaling of the sub-frame, and transmit the sub-frame to the display.
H04N 7/18 - Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
F41G 1/38 - Telescopic sights specially adapted for smallarms or ordnance; Supports or mountings therefor
G02B 23/00 - Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
G02B 27/32 - Fiducial marks or measuring scales within the optical system
G09G 5/37 - Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of individual graphic patterns using a bit-mapped memory - Details of the operation on graphic patterns
An auto-center barrel cam for small optical systems including an outer barrel having a first channel extending longitudinally where the first channel is tapered from an inner surface to an outer surface of the outer barrel at a first angle and an inner barrel within the outer barrel. The inner barrel including a second channel extending longitudinally along the inner barrel where the second channel is tapered from an inner surface to an outer surface of the inner barrel at a second angle. A cam follower includes a flexure part having a first section with a first surface and a second section with a second surface. A spring section pulls the first section and the second section toward each other. The flexure part is arranged to maintain the cam follower within a center of the first and second channels as the inner barrel moves in relation to the outer barrel.
F41G 1/38 - Telescopic sights specially adapted for smallarms or ordnance; Supports or mountings therefor
G02B 7/04 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
G02B 7/02 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses
A rail mounting assembly for mounting an accessory to a rail of a firearm includes a base portion arranged to support the accessory. The assembly includes a lock nut receiving recess on a first side portion and a moveable clamp on a second side portion where the side portions cooperate to grip the rail. A crossbar extends b etween the side portions such that the crossbar is movable relative to the moveable clamp. A lock nut is threadably engageable to an end of the crossbar proximate to the first side portion and a lock plate is positioned within the lock nut receiving recess between the lock nut and a spring disk when the lock nut is threadably engaged with the crossbar. The lock nut receiving recess is shaped to prevent rotation of the lock plate while allowing rotation of the lock nut.
A locking rail mount including a body mounted adjacent to a mounting rail and a clamp screw extending through a channel defined by the body and across the mounting rail. The clamp screw includes a screw head having a surface facing toward the mounting rail with locking elements having a surface relief geometry. At least one compression spring is positioned between the body and a rail clamp that pushes the rail clamp toward the surface of the screw head. The surface of the rail clamp includes locking elements having the surface relief geometry that are complementarily arranged with respect to the locking elements of the screw head. When the clamp screw is tightened, the locking elements of the rail clamp and screw head are aligned to lock the rail clamp and clamp screw together to prevent unintended rotation of the clamp screw.
In some embodiments, a method includes: selecting dimensions of a slot to be provided in a device feature, the dimensions selected to accommodate one or more tools while resulting in tangential contact between the slot and the one or more tools when the one or more tools are inserted into the slot and used to manipulate the device feature; and forming the slot in a surface of the device feature according to the selected dimensions.
An optical sighting device includes an eyepiece positioned to receive optical radiation along an optical axis to produce a real exit pupil located remote from the eyepiece. The real exit pupil is positioned at an eye relief distance from the eyepiece along the optical axis. A digital signal processor determines an axial distance from the eyepiece to an eye positioned proximate the real exit pupil along the optical axis. An aperture stop is centered along the optical axis to direct the optical radiation in a direction of the eyepiece. The eye relief distance is based at least in part on a position of the aperture stop along the optical axis. The optical sighting device further includes an eye relief actuator to translate the aperture stop along the optical axis to null a spatial offset between the eye relief distance and the axial distance to the eye.
G02B 23/00 - Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
F41G 1/38 - Telescopic sights specially adapted for smallarms or ordnance; Supports or mountings therefor
F41G 3/06 - Aiming or laying means with rangefinder
G02B 7/02 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses
A spring damper device comprising a directional spring having first and second ends, and defining an inner diameter region. A damper (e.g., viscoelastic polymer slug) comprising an element of elasticity configured to be situated within the inner diameter region of the directional spring. In response to a load on the spring damper device, the directional spring operates to compress, and the damper operates to dampen vibration associated with the load. The damper can comprise a viscoelastic damper comprising both an element of viscosity and the element of elasticity. The damper can be substantially coaxially aligned with the directional spring. Spring damper device(s) can be preloaded in a micro adjustment mechanism to account for positional adjustments between two structures (e.g., between a scope and a firearm), such that the spring(s) attenuate a shock impulse event (e.g., when firing), while the damper(s) attenuate vibration (e.g., to prevent damage the scope).
F16F 3/12 - Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction the steel spring being in contact with the rubber spring, e.g. being embedded in it
F41G 11/00 - WEAPON SIGHTS; AIMING - Details of sighting or aiming apparatus; Accessories
13.
ALL SEEING ONE CAMERA SYSTEM FOR ELECTRONIC TOLLING
A method of electronic tolling for a vehicle travelling on a road surface includes arranging a single camera or a single array of cameras to have a field-of- view that is normal to the road surface and is defined by a plane that is parallel with the road surface, and capturing multiple images of the front, side, top and rear of the vehicle using the single camera or the single array of cameras in the field-of-view. The set of multi-perspective images can be used to identify a vehicle by reading the front and rear license plate and to determine a classification of the vehicle. The images may also be used to track the position of the vehicle on the road surface as the vehicle traverses the field-of-view.
Optical combiners and methods of manufacturing and alignment thereof are provided. An optical combiner includes a first optical element with a convex surface and a second optical element with a concave surface. At least one of the convex or concave surfaces has an aspherical curvature, e.g., is an aspherical surface. A reflective coating is applied to the aspherical surface, and an adhesive couples the convex surface to the concave surface to provide a combined optical element. The combined optical element, or optical doublet, may be aligned with a light source, to be reflected by the reflective coating, to provide an aiming reference for a user.
A system for delivering light from a light source to a digital micro-mirror device. The system includes one or more lens groups. At least one lens of the system is laterally displaced, so that its optical axis is not centered on the chief ray of the system.
G02B 27/18 - Optical systems or apparatus not provided for by any of the groups , for optical projection, e.g. combination of mirror and condenser and objective
G02B 11/04 - Optical objectives characterised by the total number of simple and compound lenses forming the objective and their arrangement having two lenses only arranged C C
G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
16.
ROTARY SWITCH OR OTHER ENCODER HAVING NON-SEQUENTIAL UNIQUE BIT PATTERN AND METHOD FOR DESIGN
An apparatus (100) for rotary encoding includes a knob (102) configured to be rotated. The apparatus also includes multiple switches (304, 402) each configured to selectively form or not form a connection based on a current rotational position of the knob. The apparatus further includes a controller (312) configured to generate or use a digital value associated with the current rotational position of the knob. The digital value is defined by which switches have or have not formed connections. Locations where the switches form the connections are selected such that the digital values uniquely identify different rotational positions of the knob and are non-sequential as the knob is rotated.
G01D 5/00 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
G01D 5/252 - Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts a combination of conductors or channels
G01D 5/32 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using optical means, i.e. using infrared, visible or ultraviolet light with attenuation or whole or partial obturation of beams of light
G05G 1/08 - Controlling members for hand-actuation by rotary movement, e.g. hand wheels
A reflex sight to sight a weapon, such as a firearm, comprises a frame carried by a base. The frame carries a mirror and an illumination source, such as an LED, spaced-apart and in a fixed relationship with respect to one another with the illumination source directed towards the mirror at a fixed orientation. A spindle is carried by the frame and disposed between the frame and the base about which an orientation of the frame with respect to the base is adjusted. The spindle has a vertical shaft extending between the base and the frame, with the frame capable of swiveling horizontally on the vertical shaft to adjust for azimuth. The spindle also has a horizontal axle extending between the vertical shaft and the frame, with the frame vertically pivotal on the horizontal axle to adjust for elevation.
A direct view optical sighting system. In certain examples the system includes an eyepiece, an objective that directs scene light to the eyepiece, a laser rangefinder, and a laser rangefinder coupling prism that directs a laser transmit beam from the laser rangefinder to the objective and a laser return beam from the objective to the laser rangefinder. Examples of the system further include a display assembly including a reticle prism and a display coupling prism, the reticle prism being positioned along the optical path between the laser rangefinder coupling prism and the display coupling prism and having a hard reticle formed on a surface thereof. The objective can be configured to produce a first focal plane of the optical sighting system coincident with the first surface of the reticle prism. The display coupling prism is configured to direct display light toward the eyepiece. Examples of the system also include a zoom relay positioned between the display coupling prism and the eyepiece and configured to adjust a magnification of the optical sighting system.
G02B 23/00 - Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
F41G 1/473 - Sighting devices for particular applications for lead-indicating or range-finding, e.g. for use with rifles or shotguns
G02B 27/34 - Fiducial marks or measuring scales within the optical system illuminated
G01S 17/08 - Systems determining position data of a target for measuring distance only
G02B 13/16 - Optical objectives specially designed for the purposes specified below for use in conjunction with image converters or intensifiers
An apparatus includes one or more LEDs (304) configured to be coupled to a power supply (302) and to generate illumination, such as to generate a reticle (200) in an optical scope (104). The apparatus also includes a first switch (316) coupled in series with the one or more LEDs. The first switch is configured to selectively activate and deactivate the one or more LEDs based on whether the first switch is turned on or off. The apparatus further includes a low power detector (308) configured to sense a low power condition of the power supply and to repeatedly turn the first switch on and off in response to the low power condition to cause the one or more LEDs to blink. The low power detector is configured to turn the first switch on and off at a given rate, and the given rate increases as the power supply is depleted.
F41G 1/34 - Night sights, e.g. luminescent combined with light source, e.g. spot light
F41G 11/00 - WEAPON SIGHTS; AIMING - Details of sighting or aiming apparatus; Accessories
G02B 23/00 - Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
G02B 27/34 - Fiducial marks or measuring scales within the optical system illuminated
H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
F41G 1/473 - Sighting devices for particular applications for lead-indicating or range-finding, e.g. for use with rifles or shotguns
Aspects are generally directed to a high speed pupil detection system and method. In one example, the method includes receiving optical radiation reflected from an eye at one or more pixels of an optical sensor, reading-out a value of each of the pixels in a plurality of lines to progressively generate an image frame of a video image stream, the value of each of the pixels being based on a flux of the received optical radiation, identifying a first chord within a first line of the plurality of lines, identifying a second chord within a second line of the plurality of lines, the first chord and second chord being separated by a subset of the plurality of lines, and determining a location of a center of a pupil of the eye based on a two chord crossing of the pupil with the first chord and the second chord.
A61B 3/11 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for measuring interpupillary distance or diameter of pupils
A61B 3/113 - Objective types, i.e. instruments for examining the eyes independent of the patients perceptions or reactions for determining or recording eye movement
A61B 3/14 - Arrangements specially adapted for eye photography
F41G 1/38 - Telescopic sights specially adapted for smallarms or ordnance; Supports or mountings therefor
G02B 23/00 - Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
21.
PULSE-WIDTH MODULATION LIGHT SOURCE DRIVE AND METHOD
A pulse-width modulation (PWM) light source drive (100, 200) for driving a light source (106, 206) is provided that includes a microcontroller (104, 204), a modulation element (110, 210), a voltage regulator (102, 202), and a light detector (108, 208). The microcontroller is configured to generate a PWM signal (114, 214) and an inverse PWM signal (120b, 220b). The modulation element is configured to generate a drive signal (116, 216) based on the PWM signal. The light source is configured to be driven by the drive signal. The voltage regulator is configured to generate an output drive voltage (112, 212) for the light source. The light detector is configured to detect light energy (1 18, 218) emitted by the light source, to generate an optical power feedback signal (120a, 220a) based on the detected light energy, and to provide the optical power feedback signal to the voltage regulator during a laser-on driving interval. The microcontroller is configured to provide the inverse PWM signal to the voltage regulator during a laser-off driving interval. The voltage regulator is configured to adjust the output drive voltage based on the optical power feedback signal during the laser-on driving interval and based on the inverse PWM signal during the laser-off driving interval.
A radar system including a narrowband radar receiver configured to receive pulsed radar return signals and a wideband receiver configured for receiving wideband signals. A noise data processor is configured to identify impulse noises by analyzing wideband signals received by the wideband receiver and a radar processor is configured to cancel the identified impulse noises from pulse signals received by the radar receiver. The wideband impulse noises utilized to cancel noise from the pulse signals corresponds to the same time period sweep of detection as that of the pulse signals.
A system for retaining an optical member about a vehicle is disclosed. The system can comprise a mount, an optical member having a first end and a second end, and a primary retention system operable to secure the second end of the optical member of the mount. The system can further comprise a secondary retention system. The secondary retention system can comprise a retaining clip coupled to one of the optical member and the mount, adjacent the second end of the mount. The retaining clip can comprise at least one aperture therethrough. The secondary retention system can further comprise a pin coupled to the other of the optical member and the mount. The pin can extend through the aperture of the retaining clip. The secondary retention system can activate to cause the pin to engage the retaining clip upon movement of the optical member relative to the mount ad at least partial failure of the primary retention system.
A gun sight clamping system utilizes a resilient device and an over-center cam to attach a gun sight to the rail of a gun. The body of the clamping system is clamped to the rail using a clamping mechanism on one side of the assembly and a resilient device on the other side of the assembly. The resilient device operates in a direction parallel to the clamping direction. A cross bar connects the clamping mechanism to the resilient device and provides a means to squeeze the body of the mount to the rail. As the !ever is closed, the cam drives the cross bar, pulling the clamping mechanism against the rail. The resilient device allows the cam to move to an over- center position wherein the unit resists loosening during operation. Once the over- center position is achieved, the spring force of the resilient device holds the cam in the closed position.
An optical device and method for illuminating an LCOS display and relaying a real image of the display to where it can be overlaid with a scene image. One example of an optical device includes a Dyson lens assembly and a polarizing beamsplitter. The Dyson lens assembly has 1:1 magnification and is configured to receive and double-pass first input light having a first polarization and to provide a first telecentric output beam having the first polarization, and to receive and double-pass second input light having a second, orthogonal polarization and to provide a second telecentric output beam having the second polarization. The polarizing beamsplitter has a polarizing beam-splitting coating, is arranged adjacent the Dyson lens assembly, and is configured to transmit the first input light to the Dyson lens assembly and to reflect the second telecentric output beam received from the Dyson lens assembly to a display image plane.
A method is disclosed for forming an article made of a metal matrix composite material having particles bonded to an anodizable matrix material. The method can include anodizing the anodizable matrix material to form an anodic layer on the anodizable matrix material. The method can also include machining at least a portion of the anodic layer.
A close quarters battlefield (CQB) sight is provided. The CQB sight includes an optical sighting element and a base plate to which the optical sighting element is integrally coupled. The base plate includes a flange and a mounting surface formed to complement a mounting surface of another optical sighting element. The flange is configured to be fastened to the another optical sighting element such that the mounting surfaces abut and the optical sighting elements become co-aligned.
A magnification zoom sighting system is disclosed. One embodiment includes an objective lens group that produces an image of a distant object at a first focal plane, a zoom lens element that relays the image from the first focal plane to a second focal plane and varies an optical magnification of the image, an ocular lens group for viewing the image at the second focal plane, a magnification adjustment mechanism coupled to the zoom lens element for adjusting an optical magnification setting of the zoom lens element to adjust the optical magnification of the image, and a reticle having magnification indicia, disposed proximate the first focal plane and such that it is configured to be viewable through the ocular lens group in a field of view thereof and superimposed upon the image. The magnification indicia conveys the optical magnification setting of the zoom lens element.
G02B 23/00 - Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
F41G 1/38 - Telescopic sights specially adapted for smallarms or ordnance; Supports or mountings therefor
G02B 15/00 - Optical objectives with means for varying the magnification
G02B 27/32 - Fiducial marks or measuring scales within the optical system
Methods and apparatus for automatically expanding the eyebox of an optical imaging device by tracking the movement of an operator's eye, and automatically repositioning the exit pupil of the optical imaging device to follow the movement of the eye.
G02B 23/12 - Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices with means for image conversion or intensification
A tactile feel control device is disclosed. The tactile feel control device can include an electric motor configured to be mechanically coupled to a manual control interface that is movable by a user. The tactile feel control device can also include a bias module operable to generate a bias to be applied by the electric motor. The bias can be configured to provide a desired tactile feel to the user at the manual control interface. In addition, the tactile feel control device can include a control module operable to output a drive signal to the electric motor configured to apply the bias. The bias can be insufficient, alone, to cause movement of the manual control interface.
G05G 5/03 - Means for enhancing the operator's awareness of the arrival of the controlling member at a command or datum position; Providing feel, e.g. means for creating a counterforce
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
31.
METHODS AND APPARATUS FOR A RADAR HAVING WINDFARM MITIGATION
Methods and apparatus for processing radar data including obtaining first and second sets of radar return signals concurrently, removing wind turbine signals adaptively from the first and second sets of radar return signals, and detecting targets in the first and second sets of radar return signals, and identifying detected targets due to clutter.
G01S 7/41 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisation; Target signature; Target cross-section
G01S 13/87 - Combinations of radar systems, e.g. primary radar and secondary radar
G01S 13/91 - Radar or analogous systems, specially adapted for specific applications for traffic control
An optical assembly includes a housing having an interior region, a first lens disposed within the interior region of the housing, a second lens disposed within the interior region of the housing, the second lens being spaced from the first lens, a spacer disposed within the interior region of the housing between the first lens and the second lens, the spacer being fabricated from glass material, and a retention assembly configured to engage the second lens when assembled to retain the first lens, the spacer and the second lens in place. The housing may include a port providing fluid communication from an exterior of the housing to the interior region of the housing. The optical assembly further may include a filler material disposed in a space defined by an exterior surface of the spacer and an interior surface of the housing via the port.
A multi-beam LIDAR optical system, that in one example includes a plurality of single mode optical fibers configured to transmit and receive light beams, and a plurality of lenses configured to collimate and focus the light beams between the plurality of single mode optical fibers and an entrance pupil of the system, wherein the system is configured to transmit and receive the light beams over an angular field of view of at least 5°.
G01S 7/481 - Constructional features, e.g. arrangements of optical elements
G02B 1/02 - Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of crystals, e.g. rock-salt, semiconductors
34.
SYSTEMS AND METHODS FOR EXTENDING MARITIME DOMAIN AWARENESS BY SHARING RADAR TRACKS BETWEEN VESSELS
A system for extending maritime domain awareness of participating vessels, each of the vessels having a shipboard navigational radar, an Automatic Identification System (AIS) having an AIS transceiver, and a positioning device installed thereon. The system comprises a domain extension device installed on each of the vessels, the domain extension devices comprising at least one processor operatively coupled to the radar, the AIS and the positioning device. The processor is configured to receive own-ship radar track data from the navigational radar indicative of detectable targets located within a detection range of the radar, receive own-ship location values from the positioning device indicative of a geographical location of the vessel when the radar track data is generated, interface with the transceiver to receive other-ship radar track data and associated other-ship location values from one or more other participating vessels within a communication range of other-ship AIS transceivers, generate a common operating picture based upon the own-ship radar track data, own-ship location value, other-ship radar track data and other-ship location values, the common operating picture including information about targets located within the detection range of the radar of the vessel and radars of the one or more other vessels, and interface with the AIS transceiver transmit own-ship radar track data and own-ship location values to one or more other participating vessels within a communication range of the own-ship AIS transceiver.
A waveguide circulator includes a waveguide junction made from a thermally conductive material and having three ports, and a ferrite cluster housed within the waveguide junction so as to be in communication with the ports. The ferrite cluster includes a plurality of ferrite segments extending from a central point of the ferrite cluster. Each ferrite segment is spaced apart from an adjacent ferrite segments by a gap. Thermal spacers made of a thermally conductive material are disposed in the gaps. Each thermal spacer is thermally coupled to the adjacent ferrite segments and the waveguide junction so as to conduct heat away from the adjacent ferrite segments to the waveguide junction. The ferrite cluster can also be used with other junction circulators including stripline junction circulators designed for high peak power applications.
A selectable local oscillator provides an output frequency signal having a selectable frequency within a desired output frequency range. The selectable local oscillator comprises first, second and third signal generators configured to provide first, second and third frequency signals having frequencies in first, second and third input frequency ranges. A first mixer provides a first mixed product signal having an upper sideband and a lower sideband. A frequency selector selects one of the upper and lower sidebands of the first mixed product signal. A second mixer provides a second mixed product signal having an upper sideband and a lower sideband. An output stage selects at least one of the upper and lower sidebands of the second mixed product signal as the output frequency signal.
H03B 21/02 - Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies by plural beating, i.e. for frequency synthesis
Various embodiments are described herein for a combiner. The combiner includes first and second transmission lines, a dielectric material disposed about the first and second transmission lines, an intermediate conductor arrangement disposed about the dielectric material, and an outer conductor arrangement disposed about the intermediate conductor. The dielectric material has a dielectric constant higher than that of air, and the intermediate conductor arrangement has reactive portions.
Various embodiments are described herein for a moving target detector that processes input data to perform detection for a current range cell. The moving target detector includes a Doppler filter bank module for processing the input data to provide several Doppler outputs for the current range cell, a no-land-clutter path for processing several input data sets related to the several Doppler outputs to provide detection data by performing peak selection on each of the several input data sets and performing detection on the results of the peak selection, a land-clutter path for processing the several input data sets to provide detection data by performing Constant False Alarm Rate (CFAR) detection on each of the several input data sets and merging the detection results; and a switching logic module for selecting one of the land-clutter path and the no-land-clutter path based on clutter information.
G01S 13/524 - Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi
39.
METHOD AND SYSTEM FOR CONCATENATION OF RADAR PULSES
A system and method are described for generating waveforms for use in radar and sonar systems. The system includes waveform generation circuitry a waveform generator and an up-conversion module. The waveform generator generates concatenated pulse waveforms at an IF band. In a given pulse repetition interval (PRI), the concatenated pulse waveforms comprise a first and second pulse types associated with first and second IF frequencies respectively. The up-conversion module up-converts the concatenated pulse waveforms to an RF band to form first and second sets of pulses. In the given PRI, each pulse is up-converted to a different RF frequency, pulses of different lengths are associated with a similar carrier frequency, and at least one pulse from each of the sets of pulses implements frequency diversity.
G01S 7/42 - Diversity systems specially adapted for radar
G01S 13/30 - Systems for measuring distance only using transmission of interrupted, pulse modulated waves using more than one pulse per radar period
G01S 7/28 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group - Details of pulse systems
40.
A CLASSIFICATION SYSTEM FOR RADAR AND SONAR APPLICATIONS
The invention lies in the field of digital airport surveillance and overcomes a problem in identifying various types of aircraft and non- aircraft targets The invention relates to an apparatus and a method for classifying a given radar track segment obtained from multiple radars wherein the method comprises of a pre-processing stage to form the given radar track segment and to generate principal/secondary track data, a feature extraction stage to process the principal/secondary track data, a classification stage that generates principal and extension classification results for the given radar track segment based on feature values, and a combiner stage that combines the extension and principal classification results to provide a classification result for the given radar track segment.
G01S 7/41 - RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - Details of systems according to groups , , of systems according to group using analysis of echo signal for target characterisation; Target signature; Target cross-section
G01S 13/87 - Combinations of radar systems, e.g. primary radar and secondary radar
41.
SYSTEM AND METHOD FOR CONCURRENT OPERATION OF MULTIPLE RADAR OR ACTIVE SONAR SYSTEMS ON A COMMON FREQUENCY
A system and corresponding method for the concurrent operation of multiple radar systems on a common frequency and in the same geographical area includes a waveform generator that specifies certain operating parameters for the transmitted radar pulses. In a first instance, the carrier frequency can include an offset for each radar system. In a second instance, complementary codes can be used for the radar pulses such that each radar system operates with a unique code for substantially reducing the cross-talk between the radar systems. In another instance, both carrier frequency offset and complementary coded waveforms can be used to increase the number of radar systems that operate concurrently. Carrier frequency offset can also be used to combat range-wrap by using different carrier frequencies for adjacent radar pulses.
G01S 13/87 - Combinations of radar systems, e.g. primary radar and secondary radar
G01S 13/28 - Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave with time compression of received pulses
G01S 13/24 - Systems for measuring distance only using transmission of interrupted, pulse modulated waves using frequency agility of carrier wave
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