Abstract: A strap mounting mechanism for an optical viewing device, such as binoculars, has a lens barrel body and a cover member which closes an opening of the lens barrel on the eyepiece side. The lens barrel body is provided at a circumferential surface thereof adjacent to the cover member, with a through hole. The cover member is provided with a strap insertion opening and a strap guide wall integral therewith, which is fitted at its one end in the through hole and is connected at the other end to the strap insertion opening to define a strap passage in the lens barrel body.

Abstract: A binocular has the right and left optical systems. A distance between these optical systems is variable for an adjustment of the pupil distance. A protecting member is arranged to protect objective lenses and eyepieces of the optical systems by sheltering them when the binocular is housed. The protecting member is movable to release the sheltering condition to expose the lenses and the eyepieces when the binocular is used. The protecting member is driven in liaison with an operation of the adjustment of the pupil distance.

Abstract: Light weight, low-cost, compact binoculars intended to be sold at retail locations and popular attractions, such as stadiums, arenas, tourist destinations, and theme parks. The binoculars utilize high reflectance mirrors to fold light and lengthen distance between the objective lens and the field lens to correct the orientation of the image. The binoculars are very light because they are made with mirrors and lightweight, injection molded acrylic plastic lenses. They are pocket sized and compact, yet adjustable for individual interocular distance. The field view is rectangular in format and the IP adjustment is by way of sliding action between nested housings made possible by virtue of the fact that the inversion and reversion functions in its separate housings are in opposite order.

Abstract: An asymmetric binocular viewing device having a first and a second optical axis forming a horizontal plane. A single objective, a related luminance intensifier tube, a semi-reflecting optical image splitter and a first ocular are aligned in succession the first optical axis. A second ocular related to the optical image splitter by an optical image transmitting system is aligned on the second optical axis. The optical image transmitting system includes in succession a first mirror, an lens system, a second mirror, and a third mirror. The elements are arranged so that an optical path is defined starting from the optical splitter and including a first vertical axis section, a horizontal axis section, and a second vertical axis section describing a U turned upside down in the shape of a bridge located on a vertical plane and perpendicular to both parallel first and second optical axes. This defines a free space between both the first and second oculars freeing up the space for the user.

Abstract: An optical system for a Head Mounted Display for a virtual reality system that employs a single high-resolution display to generate separate right-eye and left-eye images for presentation to a user. The display projects a single image onto an array of adjacent lenses that serve to magnify it, and to project the image onto an optically distant diffuser screen. The diffuser screen, which increases the angular dispersion of the image, is in close proximity to a columnar array of microprisms. The microprism beam splitter serves to split the single image into separate right-eye and left-eye component images, and to direct each component image to its respective eyepiece at an off-axis angle. The optical system further includes two separate eyepieces, each including Fresnel lens/prisms that redeflect their respective images onto optical axes which are parallel to, but laterally displaced from the original, central optical axis.

Abstract: A focusing lens for adjusting the dioptric power in accordance with the user's dioptric power is provided in each of right and left lens barrels. When a main switch dial is set at a normal position, a microcomputer sets the focusing lens at a dioptric power of 0 by controlling a motor so that the focusing lens moves to a position corresponding to a dioptric power of 0.

Abstract: A sliding binocular body has two optical assemblies which slide on an intermediate plate to adjust for intraocular distance and which slide closed. Two shells are joined to form one assembly. Front and back contour plates cover the assembly. A field and eye lens holder slides into the box through the back plate. An eye piece is attached to the lens holder. Inward horizontal surfaces have inward extending rails, which engage outward facing grooves on the intermediate plate. The two shells are secured together and joined to the intermediate plate before mirrors are slid and clamped into place. The objective lenses are placed in position, and the contour plates are sealed in place. The eye lens and field lens are inserted in the holders before the holders are inserted in the assemblies. The assemblies hold and clamp mirrors against fixed reference surfaces. Objective lens holders formed in the assemblies permit vertical or horizontal adjustment of an objective lens before its fixing.

Abstract: Pseudoscopic, dual-path optical systems employing plane mirror arrangements for cross coupling the optical paths to reverse the left and right perspectives of object space are provided. Advantageously, the cross coupled path arrangements permit the systems to be manufactured inexpensively because low-cost reflective components can be used and assembled with alignment requirements that are significantly relaxed compared with customary requirements found in uncoupled systems utilizing high-cost prisms or mirror arrangements for similar purposes.

Abstract: Telescopic optical systems of a binocular have respective objectives movable along respective optical axes for focusing on an object, and respective power-varying lens assemblies movable along respective optical axes for varying magnifications. One of the objectives is manually movable independent of the other objectives for diopter difference adjustment. The binocular has a manually operable mechanism for actuating the power-varying lens assemblies to adjust the magnifications independently of each other, to equalize the magnifications regardless of angular movement of the telescopic optical systems about the optical axes of the objectives for interpupillary adjustment. Electric motors for moving the objectives into an in-focus condition and moving the power-varying lens assemblies to vary the magnifications synchronously, are disposed on one side of a plane interconnecting the optical axes of the objectives. Batteries for energizing the electric motors are disposed on the other side of the plane.

Abstract: Telescopic optical systems of a binocular have respective objectives movable along respective optical axes for focusing on an object, and respective power-varying lens assemblies movable along respective optical axes for varying magnifications. One of the objectives is manually movable independent of the other objectives for diopter difference adjustment. The binocular has a manually operable mechanism for actuating the power-varying lens assemblies to adjust the magnifications independently of each other, to equalize the magnifications regardless of angular movement of the telescopic optical systems about the optical axes of the objectives for interpupillary adjustment. Electric motors for moving the objectives into an in-focus condition and moving the power-varying lens assemblies to vary the magnifications synchronously, are disposed on one side of a plane interconnecting the optical axes of the objectives. Batteries for energizing the electric motors are disposed on the other side of the plane.

Abstract: Binoculars having two telescopic optical systems for forming a stereoscopic image of an object. Each telescopic optical system has an image sensor, a first optical system, a second optical system and a display. The first optical system forms an image of the object on the image sensor, with the image sensor outputting an electrical signal that represents the image. The second optical system is used for viewing another image of the object. The display reproduces the electrical signal output by the image sensor. The binocular further includes a switch that switches between a first mode where the image is viewed using the second optical system, and a second mode where the image is reproduced using the display.

Abstract: The invention is an optical device, similar to a pair of binoculars, which includes, between the objective lens and the eyepiece a miniature screen displaying an image controlled by a computer, and an optical reflex device capable of superimposing the screen image on the image seen through the objective lens. The device also includes, selectively or cumulatively, a variable light attenuator, a light amplifier for night vision, sensors to detect the line of sight of the optical device, and a computer which can also be selectively or cumulatively connected to a localization receiver of the "global positioning system" type and a transceiver. The device can be used to add further information on geographic positions, friends, enemies, infrared images, etc. into the scene seen through the binoculars.

Abstract: A binocular expanded field of view spectacle mounted microscope including a single microscope provided in front of and mounted to a bridge of a spectacle frame, a first pair of optical path deflectors rotatably connected to the spectacle frame of each side of the bridge of the frame and projecting into a line of sight and visual axis in a direction of the microscope and a second pair of optical path deflectors mounted on the spectacle frame such that a line sight and visual axis from the microscope deflected by the first pair of optical path deflectors is directed towards each eye of a wearer whereby a field of view for each eye is partially overlapped by rotating the first pair of optical path deflectors to provide an expanded field of view including a single zone of binocular vision and a zone of monocular vision on each side of the single zone of binocular vision.

Abstract: Binoculars designed to provide a large aided static field of view are provided. The binoculars are characterized by S/D ratios of above 2.8, where S is the binoculars' aided static field of view calculated by multiplying the binoculars' magnifying power by the binoculars' semi field of view in object space and D is given by tan.sup.-1 [(R.sub.ex +1.5)/13], where R.sub.ex is the radius of the binoculars exit pupil the following expression in which R.sub.ex and the constants 1.5 and 13 are in milliliters. As a result of the increased S/D ratio, the binoculars of the invention minimize the sensation of tunnel vision which normally occurs when binoculars are used and reduce the user's apprehension of missing activities in his or her peripheral vision. In certain embodiments, a movable field lens unit is employed to provide variable power and a negative corrector lens unit is employed for aberration correction and to minimize the size of the binoculars.

Abstract: In a telescope, the adjustment order is limited so that dioptric power adjustment is made after adjustment of a distance between a pair of optical systems is completed. A pupil distance and a dioptric power correction amount are stored in a memory for every user. When a user uses the telescope, his or her pupil distance and dioptric power correction amount are read out from the memory to automatically make adjustment.

Abstract: Night vision binoculars including an optical system for the projection of an incident light flux formed by an objective which is itself coupled through an image-reducing interface to detection means in matrix form where the image from the interface is converted into a video signal supplied to at least one miniature display coupled to an ocular. The binoculars may take the form of two modules that can be fitted into each other, a body module and a binocular visor module. Application to night vision by electronic imaging with overlay of additional information elements.

Abstract: A binocular apparatus body blank of sheet material and divided by fold lines includes a distal wall having a pair of spaced apart objective lens ports and two opposing lateral edges; a bottom wall extending from an edge of the distal wall and having a lateral fold line to permit the apparatus body to collapse; a top wall extending from an opposing edge of the distal wall and having a lateral fold line to permit the apparatus body to collapse; a proximal wall having an outer face and two opposing lateral edges and having a pair of spaced apart eyepiece ports and extending from an edge of said top wall opposite the distal wall; a bonding flap extending from an edge of the proximal wall opposite the top wall for bonding to the remote longitudinal edge of the bottom wall; two side walls extending from the opposing lateral edges of the distal wall, each side wall having a remote end and a lateral fold line to permit the side walls to collapse simultaneously with and top and bottom walls; and a side wall bonding se

Abstract: A binocular reflecting telescope having two Cassegrain or Schmidt-Cassegrain reflecting mirror units having the same aperture and the same focal length; each unit includes a concave primary mirror and a convex secondary mirror provided opposite to each other along each of two parallel first optical axes; the telescope also having two erect real image forming devices each including a combination of place mirrors for guiding a ray of light out of the first optical axis from a point between the primary mirror and the secondary mirror. Two eyepiece units are provided and are rotatable about the optical axes of the light rays guided out of the two erect real image forming devices.

Abstract: A flat-format binocular kit from which binoculars may be constructed. The kit is intended for vending at events and performances. In the kit, a flat objective carrier in which objective lenses are mounted, and a flat eyepiece blank in which eyepiece lenses are mounted are cut from a corrrugated blank. Also cut from the corrugated blank is a device that disposes the object carrier relative to the eyepiece blank to form a focusing telescope from each objective lens and the eyepiece lens. In a method of making binoculars from a flat-format kit of parts, a flat objective carrier in which objective lenses are mounted, and a precut flat eyepiece blank in which eyepiece lenses are mounted, are supplied partially cut out from a corrugated blank. The objective carrier and the eyepiece blank are extracted from the corrugated blank. Then, the object carrier is disposed relative to the eyepiece blank to form a focusing telescope from each objective lens and eyepiece lens.

Abstract: A binocular mountable on a headgear, includes two optical systems, one for each eye of the user. Each system includes at least an objective lens and an eyelens. The binocular is pivotably attached to the headgear. When the headgear is in position on the user's head, the objective lenses and the eye lenses can be quickly swiveled out of the way to facilitate free and unaided vision, and returned to the position of binocular-aided vision. The binocular optical systems can be configured to provide either telescopic or microscopic effects. Moreover, the mounts of the lenses are transparent and integrally formed with the respective lenses. Thus, a continuity of visual field without "tunnel" vision is achieved. Hook and loop type fasteners can be used to attach the optical systems to the headgear, which can be either a cap or a visor. Additionally, a laser light/sun light shield can be provided. The optical systems can define bifocal optical systems. A single optical system (i.e.

Abstract: A pair of binoculars with built-in gyroscope for steadying comprising: a housing comprising a first housing half and a second housing half with a pivotal coupling to secure the housing halves together, each of the housing halves having lenses for optical magnification, the housing halves and lenses having normally horizontal optical axes essentially parallel with respect to each other; a supplemental housing in a cylindrical configuration having an axis centrally disposed between the optical axes and perpendicular thereto, the supplemental housing being located between the optical halves adjacent at an intermediate extent thereof; and a gyroscope having a shaft coincident with the axis of the supplemental housing, the gyroscope having an enlarged circular periphery and radial supports between the shaft and the periphery.

Abstract: Binoculars, having a body made of a cardboard or cardboard-like synthetic resin material, are convertible into a box-like form wherein a pair of objective lenses and a pair of eyepiece lenses are correspondingly positioned for use, and are foldable into a panel-like form along folds thereof when not in use and stored. The binoculars are optionally attachable to a disposable camera and may be place in a folded state while allowing use of the disposable camera.

Abstract: A flip-up helmet mount for a night vision goggle includes a plurality of nested relatively movable brackets, the first of which is secured to a user's helmet. A second bracket pivots relative to the first to provide flip-up motion for the night vision goggle, and a third of the nested brackets is pivotal on the second bracket to provide a tilt angle adjustment for the night vision viewer. In order to both save battery power, and to prevent the user from inadvertently revealing his position by forgetting to turn off the night vision viewer before flipping it up, the support structure includes a magnetic flux source cooperable with a magnetically-responsive switch of the night vision viewer to maintain the viewer turned on only when the viewer is in its use position.

Abstract: Binoculars designed to provide a large aided static field of view are provided. The binoculars are characterized by S/D ratios of above 2.8, where S is the binocular' aided static field of view calculated by multiplying the binoculars' magnifying power by the binoculars' semi field of view in object space and D is given by tan.sup.-1 [(R.sub.ex +1.5)/13], where R.sub.ex is the radius of the binoculars exit pupil and where R.sub.ex and the constants 1.5 and 13 are measured in millimeters. As a result of the increased S/D ratio, the binoculars' of the invention minimize the sensation of tunnel vision which normally occurs when binoculars are used and reduce the user's apprehension of missing activities in his or her peripheral vision. In certain embodiments, a movable field lens unit is employed to provide variable power and a negative corrector lens unit is employed for aberration correction and to minimize the size of the binoculars. The binoculars are suitable for mass production and general consumer use.

Abstract: Binoculars designed to provide a large aided static field of view are provided. The binoculars are characterized by S/D ratios of above 2.8, where S is the binoculars' aided static field of view calculated by multiplying the binoculars' magnifying power by the binoculars' semi field of view in object space and D is given by tan.sup.-1 [(R.sub.ex +1.5)/13], where R.sub.ex is the radius of the binoculars' exit pupil and where R.sub.ex and the constants 1.5 and 13 are measured in millimeters. As a result of the increased S/D ratio, the binoculars of the invention minimize the sensation of tunnel vision which normally occurs when binoculars are used and reduce the user's apprehension of missing activities in his or her peripheral vision. In certain embodiments, a movable field lens unit is employed to provide variable power and a negative corrector lens unit is employed for aberration correction and to minimize the size of the binoculars. The binoculars are suitable for mass production and general consumer use.

Abstract: A night vision binocular assembly capable of converting low light and infrared energy into a visible image. The night vision binocular assembly includes at least one objective lens assembly, image intensifier tube, collimator lens assembly and diopter cell assembly encased in an easy to assembly waterproof housing. The objective lens assembly, image intensifier tube, collimator lens assembly and diopter cell assembly are all supported by a common base structure within the housing. As a result, variations caused by thermal expansions and contractions are evenly distributed among the various optical elements, thereby preserving a predetermined optical relationship between those elements. Simple button controls are used to operate and adjust the night vision binocular assembly. The button controls are disposed on a common circuit board. An elastomeric structure is disposed between the circuit board and the interior of the binocular housing.

Abstract: Aperture stops are positioned in the optical train of a partially overlapped binocular display in a such a manner that overlapping portions the binocular boundaries of the left and right fields of view are substantially out of focus, and therefore do not appear as well defined, distracting contours in the visual field. The present invention is particularly well suited for use in virtual reality systems employing head mounted displays.

Abstract: A lightweight telescopic lens of monolithic construction is revealed that corporates additional refractive and reflective curved surfaces to produce all the optical functions performed by an ordinary telescope. A pair of such lenses may be mounted in an eyeglass frame to yield a telescope that can be worn like a pair of eyeglasses, thus affording superior image stability as well as free the user's hands. Minor modifications involving the use of several menisci of a different index of refraction from that of the core lens can be made to achieve achromatism of emergent light from achromatic input light. The entire core lens can also be shaped into a meniscus to take advantage of the principle of total internal reflection, thereby increasing the light-gathering aperture while at the same time rendering the lens even more compact and lightweight.

Abstract: A support-measure to pinpoint and neutralize electro-optical viewing devi or systems is provided which utilizes blind optical augmentation. The counter-measure uses a light source to which current viewers are blind and a combination of visible and far infrared viewing or detection devices.

Abstract: Pseudoscopic, dual-path optical systems employing plane mirror arrangements for cross coupling the optical paths to reverse the left and right perspectives of object space are provided. Advantageously, the cross coupled path arrangements permit the systems to be manufactured inexpensively because low-cost reflective components can be used and assembled with alignment requirements that are significantly relaxed compared with customary requirements found in uncoupled systems utilizing high-cost prisms or mirror arrangements for similar purposes.

Abstract: A search light employs variable polarization angles to enhance target identification. The search light shines a beam of light which may be directed across terrain. The beam of light is alternated in polarization angles at a rate of about five to twelve cycles per second. The alternating contrast in polarization angles produces flashing to an observer viewing certain targets struck by the beam of light. The flashing appears when striking man-made objects which tend to have a differential in polarized light between horizontal and vertical polarization. Natural objects do not appear to provide the flashing to the observer. The rotating polarization angles are accomplished in one instance by using a stationary polarizer and a liquid crystal retarder mounted in front of a light source. In another instance, the change in polarization angles is accomplished by rotating a polarizer in front of a light source. The light source may be infrared, visible or ultraviolet.

Abstract: A lightweight telescopic lens of monolithic construction is revealed that corporates additional refractive and reflective curved surfaces to produce all the optical functions performed by an ordinary telescope. A pair of such lenses may be mounted in an eyeglass frame to yield a telescope that can be worn like a pair of eyeglasses, thus affording superior image stability as well as free the user's hands. Minor modifications involving the use of several menisci of a different index of refraction from that of the core lens can be made to achieve achromatism of emergent light from achromatic input light. The entire core lens can also be shaped into a meniscus to take advantage of the principle of total internal reflection, thereby increasing the light-gathering aperture while at the same time rendering the lens even more compact and lightweight.

Abstract: A Newtonian binocular telescope (20), which is readily adaptable to popular telescope mounts, such as the Dobsonian mount (76), and which includes two primary mirrors (42a, 42b), and two secondary mirrors (32a, 32b), in a single tube (21) of either solid wall or open frame construction. The single tube (21) allows central secondary optical axes (34a, 34b) to be disposed in laterally and longitudinally separate parallel relation to one another so as to form a comfortable interocular axis (36) between them. Both telescopes' oculars (50a, 50b) are conveniently disposed adjacent an ocular wall (22) on a side of tube (21) nearest one of the telescopes. The viewer is provided easy access (91a, 91b and 92a, 92b) to primary alignment means (87a, 87b), which may be used to merge images between telescopes.

Abstract: An apparatus (10) for providing the coordinated rotation of two interrelated components (12, 14) includes first and second cam segment lobes (20, 22) each respectively associated with the interrelated components (12 14), the cam segment lobes (20, 22) are urged into rotatable contact with each other such that when the components (12, 14) are subjected to a torque the lateral distance therebetween is changed.

Abstract: A device will assist in detecting man-made objects by using a liquid crystal retarder and a stationary polarizer. The liquid crystal retarder shifts impinging light 90 degrees between a nonrotated and a rotated mode. In the nonrotated mode, the retarder is essentially transparent, with the light passing through the retarder and through the polarizer. In the rotated mode, the impinging light will be rotated 90 degrees. An observer viewing the light passing through the polarizer will detect a difference or a flashing, with the rate depending upon the speed of oscillation between the rotated and nonrotated modes. The system can be employed with visible light optical systems such as binoculars, or with an infrared detector or video camera.

Abstract: Binoculars designed to provide a large aided static field of view are provided. The binoculars are characterized by S/D ratios of above 2.8, where S is the binoculars' aided static field of view calculated by multiplying the binoculars' magnifying power by the binoculars' semi field of view in object space and D is given by tan.sup.-1 [(R.sub.ex +1.5)/13], where R.sub.ex is the radius of the binoculars' exit pupil and where R.sub.ex and the constants 1.5 and 13 are measured in millimeters. As a result of the increased S/D ratio, the binoculars of the invention minimize the sensation of tunnel vision which normally occurs when binoculars are used and reduce the user's apprehension of missing activities in his or her peripheral vision. In certain embodiments, a movable field lens unit is employed to provide variable power and a negative corrector lens unit is employed for aberration correction and to minimize the size of the binoculars. The binoculars are suitable for mass production and general consumer use.

Abstract: A collapsible binocular comprising a substantially rectangular open-sided housing and an elongated side wall member is provided. Objective lens means and eyepiece lens means maintain the construction of the binocular and provide protection for the lenses.

Abstract: An optical device for reorienting an optical image from a first optical pathway to a second optical pathway and the method of manufacturing such an optical device. In a preferred embodiment, a housing is provided that defines at least two optical pathways. Both optical pathways align with a common aperture in the housing. Since both optical pathways are generally cylindrically shaped and the common aperture aligns with both optical pathways, the common aperture is elliptical in shape so as to correspond to the plane of intersection between the two cylindrical pathways. A generally rectangular mirror, that is larger than the elliptical aperture in the housing, is placed over the aperture on the exterior of the housing. As a result, the mirror covers the area of the elliptical aperture and redirects any light passing through the elliptical aperture from one of the optical pathways into the other optical pathway.

Abstract: A device will detect man-made objects by using a polarizer mounted to a video camera. The polarizer rotates about an axis in front of a lens array of the video camera. The rotation of the polarizer alternately polarizes light received in proportion to the speed of rotation. This produces flashing in intensity for detecting the object as well as background rejection due to its lack of polarization. A man-made object having both horizontal and vertical surfaces of a type that will reflect light that can be polarized will provide flashing through the lens array as the polarizer passes through horizontal and vertical position. On the other hand, backgrounds don't have polarized components and won't flash. Attention is drawn to the man-made target. A high pass filter between the video signal processor and the monitor reduces background from the observed scene, permitting precise lock-on to the target.

Abstract: In a telescope according to the present invention, defocus amount of an optical system constituting the telescope is calculated; whether or not the defocus amount is within a predetermined in-focus range obtained from a focal point adjusting ability of human eye is discriminated; and when the defocus amount exceeds the in-focus range as a result of the above discrimination, the optical system is driven. The optical system is driven in a shorter time than a time required for removing a defocus by human eye.

Abstract: A binocular telescope mountable on a headgear, which comprises two optical systems, one for each of the user, each system constituting at least an objective lens and an eyelens. The telescope is pivotably attached to the headgear. When the headgear is in position on the user's head, the objective lenses and the eyelenses can be swiveled out of the way to facilitate free and unaided vision, and returned to the position of telescope-aided vision.

Abstract: A device will detect man-made objects by using a polarizer. The polarizer rotates about an axis in front of a lens array. The rotation of the polarizer alternately polarizes light received in proportion to the speed of rotation. This produces flashing in intensity for detecting the object as well as background rejection due to its lack of polarization. A man-made object having both horizontal and vertical surfaces of a type that will reflect light that can be polarized will provide flashing through the lens array as the polarizer passes through horizontal and vertical position. On the other hand, backgrounds don't have polarized components and won't flash. Attention is drawn to the man-made target. The background can also be electronically eliminated from the observed scene, permitting precise lock-on to the target.

Abstract: The field of the disclosure is that of enlarging optical lenses and, more precisely, binocular optical systems designed to be inserted into the night-time channel of an observation system, between a light intensifier tube and an observer's eyes. The disclosure can be applied especially to observation instruments for armored vehicles and, notably, periscopes for tanks. The disclosed optical system for a binocular device is of the type constituted by two groups, a forward group and a rear group, the rear group being constituted by a bonded doublet with plane rear face comprising a convergent convex lens bonded to a divergent lens, the lenses of the bonded doublet having different and complementary dispersions to compensate for the chromatism, and the focal length of the doublet ranging from 0.85F to 1.05F, where F is the focal length of the binocular device.

Abstract: A method and apparatus for reducing the effects of binocular rivalry in a partially overlapped binocular image are disclosed. A false contour line is generated either electronically or mechanically along the border between the binocular and monocular images. This contour line reduces binocular rivalry in both convergent and divergent partially overlapped binocular displays.

Abstract: The present invention relates to an improved collimator assembly that includes two separate optical paths. Each optical path passes through a corrector lens arrangement substantially centered and aligned with one of two eyepiece lens assemblies. Each corrector lens arrangement is constructed so as to selectively refract light passing through it, in such a manner so as to counteract and reduce the axial chromatic aberrations that occur in the eyepiece lens assemblies.

Abstract: A device to secure binoculars to a tripod having a rectangularly shaped base plate of a durable material, a rectangularly shaped compressible resilient pad made of a high density closed cell foam material operably attached to the top side of the base, a holding plate situated centrally to the resilient pad and operably attached to the base, the holding plate securing the central point of an elongated flexible holding strap. The opposite ends of the strap emerging from under the holding plate provide a pair of loops to receive the monocular barrels of a pair of binoculars. The ends of the straps pass through individual openings at each end of the base not covered by the pad. At each end of the holding strap is a hook type cloth fastening material and a loop type cloth fastening material, each end of the strap passing through a respective oval opening to return on itself, the hook and loop fastening means engaging, thus securing the binoculars in place.

Abstract: In binoculars employing a pair of telephotographic optical systems with their respective optical axes being arranged in parallel to each other, the telephotographic optical systems having a lens group for focusing, respectively, and at least one of the telephotographic optical systems having a lens group for diopter-adjusting; first shaft member for simultaneously moving each lens group for focusing in an optical axis direction; and second shaft member for moving the lens group for diopter-adjusting in the optical direction; wherein the first shaft member and the second shaft member are arranged coaxially. Thus, it becomes possible to adjust a diopter-difference and a difference of eye contact positions by means of a single mechanism and to easily adjust focusing with a simple arrangement.

Abstract: A monocular inspection system (10) having a substantial eye relief (62), a large exit pupil, and a line of sight viewing of an object under observation (14). The inspection system (10) includes an objective lens assembly (20) which forms an image of the object (14) and which has an axis coincident with an optical path (66). A prism (16) redirects the optical path (66) to coincide with a viewing axis (64) such that the image is formed in a focal plane intersected by the viewing axis (64). A monocle assembly (40) having an axis coincident with the viewing axis (64) forms an exit pupil for the image.

Abstract: The present invention relates to an improved collimator assembly that includes two separate optical paths. Each optical path passes through a corrector lens arrangement substantially centered and aligned with one of two eyepiece lens assemblies. Each corrector lens arrangement is constructed so as to selectively refract light passing through it, in such a manner so as to counteract and reduce the axial chromatic aberrations that occur in the eyepiece lens assemblies.

Abstract: An automatic focusing telescope capable of automatic focusing.