Abstract: A parallax free sight which utilizes a concave-convex lens with a parabolic shaped optical surface attached to one end of a light channel, the concave side of the lens faces into the light channel, the perimeter dimensions of the lens is adapted to the rectangular shape and dimensions of the light channel, with the longer sides of the rectangular lens perimeter positioned in a horizontal plane when the sight is in use. A transparent body is attached to the other end of the light channel. A light emitting source is arranged at the focal point of the concave side of the lens, between the lens and the transparent body. The light source can be a light emitting material or an electrical light source, powered by a rechargeable battery or a solar cell, or both. A light reflective layer is attached to the concave side of the lens to only reflect light of the wavelengths corresponding to the light emitted by the light emitting source.

Abstract: An apparatus for producing a collimating mark within an optical sighting device includes a light source to generate a beam of light for the mark, imaging optics, and a beam splitter. The beam splitter reflects one portion of the light from the light source into a sighting ray path and directs another portion of light on to a two-dimensional photosensor matrix. From the signals generated by the matrix, the actual position of the collimating mark is determined. A ballistics computer predetermines a set position. Control signals are generated based on an actual position/set position comparison to permit the continuous movement of the collimating mark such that it indicates the elevation and lead angles relative to the optical axis of the sighting device. The signals generated by the photosensor matrix are also used to control the contrast of the collimating mark with respect to its immediate surroundings.

Abstract: A bow sight apparatus is described with at least one lighted reticle aiming spot which is projected onto a partially reflecting mirror through which the target is viewed to superimpose the aiming spot on the target image. A light guide of fluorescent plastic is employed to convert ambient visible light entering such light guide into colored light of a selected wavelength, such as green light, which is transmitted through one or more aiming apertures in a reticle member to produce the aiming spot. Range adjustment is provided by moving a reticle projection mirror to adjust the position of the aiming spot between different precalibrated range positions, or by providing several different aiming spots corresponding to different target ranges. A bow mount attaches the sight to a bow handle by a bracket which adjusts the sight vertically and horizontally for calibration sighting of the sight.

Abstract: This system enables the boresighting of the optical axes of a system comprising, for example: an infrared distance measuring device, a television camera, sensitive in the visible band, and a laser telemeter which does not emit radiation in the ranges of spectral sensitivity of the distance measuring device and of the camera. One embodiment includes:a collimated radiation source, associated with the laser;a wide-band collimator including, in its focal plane, a screen with holes cut out in it, constituting a reticle illuminated by an incandescent bulb, the surface of the screen being covered with glass micro-beads. The source associated with the laser forms a light spot on the screen, and this light spot is visible to the television camera. The holes form a reticle visible both to the television camera and to the distance measuring device. The distance measuring device determines the distance between the image of the reticle and a reference point on its image sensor.

Abstract: A weapon sight assembly comprising a combined telescope 2 and laser unit 1 through which the user can view both a target and a laser light spot generated by the laser unit 1 on a target at the same time. A rhomb assembly housing 6 to direct the laser light into the side of the telescope 2 behind the objective lens 3 of the telescope 2. The emitted laser light beam is reflected by means of the rhomb assembly 6, which combines the laser light with the optical axis 22 of the sighting telescope 2, thereby eliminating the problem of parallax between the optical axis of the telescope and the emitted laser light beam. The entire weapon sight assembly is then mounted in a ring base attached to the weapon, said ring base being fully adjustable for windage and elevation.

Abstract: The sight is of the type in which a virtual image of a graticule pattern (3) is made to overlie the view of a target through the sight along a viewing axis of the sight. The sight has an optical arrangement with a single composite graticule pattern having a light transmissive component and a light reflective component. The composite graticule pattern may be illuminated by light from the sky above the target or by the light from an artificial source to give a virtual image of at least a part of the single graticule pattern. Thus an artificial light source may be permanently mounted to the sight, to allow a daylight reflective graticule to be used during daylight and a transmissive graticule to be used at night time. During the day superimposed images of both graticule patterns may be viewed.

Abstract: In an opto-electronic sight, including several optical devices, the separate optical axes are combined by means of mirrors and beam splitters so that all the beam paths amay be directed exactly at the same sight point, either directly or via a directing and stabilizating mirror. Axis alignment errors and the need for axis adjustment are eliminated.

Abstract: A sight for aiming a spotlight on a particular target, such as a performer on stage, has a partially reflective panel supported on the spotlight in an inclined position through which the operator can see the target, and sight also includes a light source which, by means of a mirror, is reflected onto the panel.

Abstract: A gun sight comprises a block of transparent material having a line of sight therethrough between a target end and a viewing end. A graticule pattern is mounted to the, in use, top surface of the sight whereby it may be illuminated by light from the sky generally above the sight. The block has a first internally reflecting surface disposed below the graticule pattern and aligned to reflect light therefrom to a second reflecting surface, which in turn is aligned to reflect light from the graticule to a partially reflective doublet lens system in the line of sight. The partially reflective doublet pattern reflects said doubly reflected light to form a virtual image of the graticule at infinity in the line of sight.

Abstract: A radiation mast such as a periscope has a head end 10 incorporating a radiation receiver in the form of a top mirror 12, the lower end 11 of the mast being physically separated by a considerable distance from end 10 and being provided with an information station, for example, in the form of viewing optics (E) and/or a video monitor 17. The radiation image formed at the receiver 12 is viewed at the information station in accurate superimposition with a reference pattern which is electronically generated by generator 19 and which is stabilized in space with respect to at least pitch, roll and yaw movements of the vehicle on which the mast is mounted. The pattern is also stabilized with respect to such disturbance factors as are effective on the information relaying means, for example, optics in path B, C, D, whereby the radiation image can be visually referenced to the electronically generated pattern, unwanted relative movements having been eliminated.

Abstract: An electronic sight having a horizontal field of view greater than the vertical field of view. The electronic sight is mounted to pivot about two axes to provide windage and elevational adjustment. A windage adjustment screw includes a windage adjustment disk that extends from a base slot into a sight tube slot. The slot in the base is elongated in a first direction and the slot in the sight tube is elongated in a second transverse direction. Rotating the windage adjustment screw moves the windage disk to cause the sight tube to pivot about a vertical axis. An elevation jack raises and lowers the sight tube to pivot the sight tube about a horizontal axis. The sight tube has a raised rail on the top that acts as a key for aid in attaching and adjusting the battery assembly and light source relative to the sight tube lens. The sight tube includes grooves on an inner surface to aid in reducing the effect of glare from ambient light.

Abstract: The surveying instrument contains a component part (1) for the optical imaging of a target and a camera (2) for the electronic acquisition of the image produced in the optical instrument part. A reference mark (20) is located in the optical part (1) of the instrument, and this is outside that region of this instrument part through which the optical axis passes. The image of the target is projected into the region located within the reference mark. Connected to the camera is a circuit arrangement which can detect both the effective center of the image of the reference mark and the effective center of the image of the target and which can determine not only the length, but also the direction of the distance between the two effective centers. The surveying of an object or a region can be carried out automatically by means of this instrument.

Abstract: The optical aiming device may be mounted on firearms. It comprises a light-collecting rod (8) consisting of a phosphor material to illuminate a central circular spot (22) of an aiming mark (6). Such illumination passes through a truncated hollow cone (25) and is used for good ambient light conditions. For poor ambient light four tritium luminous cells (18, 19, 20, 21) are mounted around the truncated hollow cone (25). Each tritrium cell illuminates one radial line component (23) of the aiming mark (6) via the external mirrored lateral area of cone (25). To adapt the brightness of the aiming mark to the brightness of the target the tritium luminous cells (18, 19, 20, 21) may be shifted on a circle around cone (25) with respect to the line components (23) of aiming mark (6).

Abstract: A night vision gunsight providing an intensified image of an external scene and an image of an illuminated reticle (13,88) superimposed on the user's (14) direct view of the external scene through the sight. The sight utilizes an eyepiece (39) through which the user (14) views the external scene directly and which also incorporates an internal curved surface (57) possessing both light reflecting and light transmitting properties which serves as a collimating reflector for light rays from an image intensifier (31) viewing the external scene. Light from the illuminated reticle (13,88) may also be collimated and reflected to the user's eye (14) by the curved surface (57) in the eyepiece (39), or alternatively by a similar surface (22) incorporated in an optical element (21,23) in the user's (14) line of sight through the eyepiece (39).

Abstract: A light dot reticle rifle shooting sight has tubular lens and battery housings supported in parallel for movement from right-handed to left-handed shooter positions by 90 degree rotation of a circumferential groove on the lens housing relative to a pin projecting into the groove from a mounting strap. Elevation and windage adjustments of the light dot are provided by adjustment screws that pivot a lens tube against diametrically opposed rubber biasing cushions and a coaxial position restoring force of a rubber ring fulcrum through which the tube extends. Rotation of the sight from right- to left-handed position interchanges the elevation and windage adjustment functions of the screws.

Abstract: A sighting device for day and night use having a beam-splitting means mounted in the line of sight between a target and the user's eye, a first source of light, being a self-energized source of artificial light, a second source of light, being an ambient-light admitting element, at least one aiming mark illuminatable by at least one of the sources of light, and at least one light-directing means adapted to project the aiming mark onto the beam-splitting means.

Abstract: A finder or sighting scope for use with an astronomical telescope, the finder scope having a target member or reticle located at the common focus of the scope objective and the eyepiece. The target member or reticle may be seen as a magnified telescope view when viewed through the eyepiece and as a target or star image against the backdrop of the sky as viewed by a naked eye, the target or star image being projected into the viewer's line of sight by the objective and a mirror and beamsplitter.

Abstract: A passive night vision reflex sight with a wide F.O.V. and designed for attachment to a weapon, such as a rifle, is disclosed. The night vision reflex sight preferably is designed for use in combination with a night vision goggle; it can also be used as in daylight without such a goggle, however. When in place, it continues to allow the use of the daytime battle sight of the weapon. The night vision reflex sight comprises a sight for viewing an image of a scene along a line of sight, a photoreceptive sensor aligned with the line of sight and viewing the image, a battery powered red L.E.D., together with a reticle, a lens, and a filter for generating a pulsed or d.c. light and for directing it at the reflex sight, with the sight reflecting the pulsed or d.c. light into the photoreceptive sensor and superimposing it on the image. Preferably, the reticle is adjustable, the pulsed light is pulsed at a rate between about two to about twelve c.p.s.

Abstract: A riflescope having an internal light source for superimposing an illuminated aiming point on the target field of view. A battery compartment at an eyepiece end of the riflescope is enclosed by a cover and switch assembly to be sheltered from moisture and dust. The switch is easily actuated even when the hunter is wearing heavy gloves, and the cover and switch assembly is in releasable engagement with the battery compartment to enable battery replacement without use of tools.

Abstract: A collimator gun sight is formed of a solid block of glass with plane parallel opposite end faces. A partially reflecting concave surface in the block forms an image at infinity of a graticule pattern which is illuminated by light entering the block through a window. The block is made from a rod with plane end faces and a lens doublet element cemented to one face.

Abstract: The present invention relates to an optical sighting system for a firearm that basically comprises a concave meniscus sighting lens of approximately zero power and fully transparent located off the optical axis, and a light source located on the optical axis generally disposed at the reflective focal point of said lens, generally between the lens and the observer's eye. The lens is operative to reflect two coinciding images of the light source towards the observer's eye, and this gives rise to an appearance where the image of the light source appears at infinity and in focus on the sighted target.

Abstract: A collinear aiming light image viewer device in a common housing through ch an observer may view both a target scene and a superimposed collinear aiming light beam within the viewer. The aiming light source is positioned in an offset area of the common housing to project a narrow IR beam off a partially reflective mirror along a portion of the optical axis of the image viewer onto a scene wherein the scene and IR beam images are simultaneously viewed through an image intensifier.

Abstract: A lens system is disclosed herein having a pair of telescoping tubes coaxially related to each other so that their central axes are coextensive. A selected one of the tubes carries a collimating lens while the other tube carries a reticle and a diffusing glass. A locking set screw fixes the pair of tubes in an optically correct relationship to each other. A mounting flange is threadably attached to the end of the lens tube opposite to its end in telescoping or sliding relationship with the reticle tube so that the lens unit may be detachable carried on a selected camera lens or camera.

Abstract: A spectral color generator is used in an optical sight for use as a gun sight, surveying instrument, or the like, with means for projecting light from the generator in the form of an illuminated reticle into the line of sight. The illumination from the generator is variable in color and intensity for maximum visibility against a variety of backgrounds, and means are provided for precise alignment, adjustment for elevation and windage and for levelling. In its basic form, the sight has long eye relief but is readily adaptable for use with telescopic attachments. The spectral color generator is also illustrated in an operational monitoring system responsive to sensing devices for monitoring a plurality of parameters including opacity and pressure.

Abstract: Apparatus for use in compensating for gun sighting errors due to misalignment between the muzzle axis of a gun and the optical axis of an associated gun sighting system is described, comprising a marker and a collimator mounted on the gun remotely from the muzzle and in fixed relation to one another, a reflector fixed to the muzzle portion of the gun barrel so as to be capable of reflecting into the collimator an uncollimated marker beam emanating from the marker, and means for defining an initial coincidence mark whose position is fixed in relation to the said optical axis so that after leaving the collimator the reflected marker beam can form a marker image superimposed upon the said initial coincidence mark, whereby any subsequent deviation of the muzzle axis from the said optical axis results in a corresponding movement of the marker image away from the initial coincidence mark.

Abstract: A collimator gunsight has a collimator lens, a transparent graticule in the focal plane of the lens, and a window behind the graticule. A small artificial light source is positioned between the graticule and the window but does not obscure the ambient light entering the window from illuminating the graticule. The graticule pattern has a first portion through which light from the artificial source can pass into the aperture of the collimator lens, and a second portion which diverts, e.g. by refraction, ambient light entering the window and by-passing the artificial source so as to fill the aperture of the lens.

Abstract: A forward observer directs a pulsed neodymium laser illuminator in the direction of a target to be marked. A detector-receiver which is fixedly mounted to an attacking aircraft detects the reflected laser energy and determines its direction of incidence. Four indicator lights are projected onto a conventional gunsight combining plate together with a crosshair reticle. The lights provide the pilot with steering signals which will permit him to aline the crosshairs and the target.

Abstract: In an optical display system, information recorded on a face plate or like optical element is injected into a main optical path by means of a standby sight device comprising a lens unit and a flexible fibre optic bundle having a numerical aperture sufficiently large to cover the maximum acceptance angle of the lens unit.

Abstract: A reflex gun sight is disclosed which provides a collimated image of a reticle, which reticle is lighted by ambient down range light. This image and the view of a target are combined by a frequency selective beam combining device. The frequency selective combination causes the reticle to appear to an observer in a color which contrasts with the target.

Abstract: An optical sight for use as a gun sight, surveying instrument, or the like, with means for projecting an illuminated reticle into the line of sight. The illumination is variable in color and intensity for maximum visibility against a variety of backgrounds, and means are provided for precise alignment, adjustment for elevation and windage and for levelling. In its basic form the sight has long eye relief, but is readily adaptable for use with telescopic attachments.

Abstract: A collimated head up display of pitch related information for an aircraft operator. A generated pitch signal combines a gyroscope signal referenced to the airframe with an inertial signal referenced to the head up display or combiner screen. A pitch error signal representing the difference between the generated pitch signal and the inertial pitch signal is limited and integrated to develop a pitch correction signal which is added to the gyroscope signal. Reference of the inertial signal to the combiner screen of the display eliminates static alignment errors. The pitch correction signal may be selected for display during alignment of the combiner screen.

Abstract: An optical sight, which includes a light source and a lens system wherein the lens system is an image of the light source, serving as an aiming point to the pointer's eye. The lens system has a reflecting surface for reflection in the direction of the pointer's eye of radiation from the light source. Means are provided for making a periodic change of the luminance of the image of the light source with a frequency with the perceptibility range of the eye.

Abstract: A spherical lens has a surface whereon a dichroic coating reflects light of known wavelength, substantially all other light being transmitted therethrough. Within the focal plane of the surface at fixed locations are respective proximal ends of a plurality of fiber light pipes. The distal ends of the fiber pipes are respectively connected to light emitting diodes whereby each diode is associated with one of the locations. In response to light being provided by a first diode, from the location associated therewith a light image of a first proximal end is transmitted to a first small region on the surface. The image of the first proximal end is collimated at the first small region and reflected therefrom. In response to light being provided by a second diode, from the location associated therewith a light image of a second proximal end is transmitted to a second small region on the surface. The image of the second proximal end is collimated at the second small region and reflected therefrom.

Abstract: An optical instrument comprising a lens means having a concave light reflecting surface serving as a semi-transparent mirror, and a light source for directing light beams to the semi-transparent mirror which is arranged to produce an image of the light source, such that said image to an observer who has his eye directed to the concave mirror surface appears to lie far in front of the mirror to serve as a sighting mark on a sighting line between the observer's eye and a target; the lens means with the semi-transparent concave mirror surface and the light source being arranged such in relation to each other and in relation to the sighting line that the optical main axis from the light source to the lens means intersects the sighting line substantially on the semi-transparent mirror surface and intersects the theoretical optical main axis of the lens means in a point situated close to the focus of the concave mirror surface, and such that the focus and said point are transversely spaced from the sighting line wh