Abstract: Disclosed is an optical scope including an objective lens, an eyepiece lens, and a reticle, wherein a field lens having negative power is disposed in at least one of a front and a back of the reticle disposed on an image formation surface of the objective lens to increase eye-relief.

Abstract: System and method for selectively viewing features of objects, including features hidden under non-transparent materials.

Abstract: An apparatus for the focusing of incident light includes a base assembly that is adapted to support a primary mirror. The primary mirror includes an outside circumference and an inside aperture. An upright member is attached to the base assembly at a first end thereof at a first location that is disposed inside the aperture and at a second location that is disposed outside the primary mirror. The upright member includes a second end that is distally disposed with respect to the first end. The second end is adapted to receive a turret that includes a secondary mirror and is adapted to pivot between two positions. An IMU is attached to the base assembly proximate the primary mirror.

Abstract: A device for the magnified viewing of an object, from which object rays originate, includes a lens system (1) for collecting object rays. In one embodiment of the invention, the device includes: a display (2) from which display rays (14) originate, and; a left eyepiece (3) and a right eyepiece (3), via which a left-eye and right-eye beam (5 and 6) of visual field rays are projected into the left and right eye of a user of the device. According to this inventive embodiment, an optical component (7, 8, 9, 10, 11) is provided with a physical ray distributing surface (12) on which a beam of collected object rays (13) and a beam of display rays (14) can be superimposed and can be divided up into the left-eye beam and right-eye beam (5, 6) of the visual field rays. This enables a reduction in losses of display rays and object rays.

Abstract: An improved lens mount and related lens and lens barrel positioning methods are provided. In one example, a lens mount for use with a miniature camera can include a ring member having a substantially cylindrical interior surface defining a substantially cylindrical interior space. A plurality of elongate ribs are disposed on the interior surface of the ring member and are adapted to exert pressure against an external surface of a lens barrel received by the ring member. In another example, a method of positioning a lens barrel includes inserting a lens barrel into a ring member having a substantially cylindrical interior surface. Pressure can be exerted against an external surface of the lens barrel from a plurality of elongate ribs disposed on the interior surface of the ring member. The pressure can prevent rotation of the lens barrel along at least three axes of rotational freedom.

Abstract: Apparatus and method for viewing a target. A primary lens produces an image plane of the target, and an optical magnifier in an optical path of the primary lens magnifies a region of the image plane, providing a magnified image. A detector receives the magnified image.

Abstract: An accessory device used together with a telescope laser collimator to align the primary mirrors of Newtonian telescopes and single mirror prime focus telescopes. An internal lens diverges the laser collimator beam and projects it upon the primary mirror collimation mark. A shadow of the mark is projected back to the screen on the device, and the mirror is aligned by adjusting it to center the shadow on the device screen.

Abstract: An optical corrector system optical system comprising two components, a first housing supporting therein a telenegative-type lens, and a second housing supporting therein a positive-type lens. The first housing is adapted to be coupled to a telescope in a manner so that the telenegative lens intercepts the image plane provided by the telescope. The second housing is adapted to be coupled to an image input portion of a remote viewing device. Opposite ends of the first and second housings are adapted to be coupled to each other in a manner so that the distance between the telenegative lens in the first housing and the positive lens in the second housing results in the intercepted image plane being repositioned from a viewing position at the telescope, to a viewing position at the remote viewing device. In a preferred embodiment, the remote viewing device comprises a binocular viewer.

Abstract: An imaging device includes a refractive imager lying in an optical path, and optionally a telescope that directs the optical path to the refractive imager. The refractive imager includes a first lens group that forms an intermediate image of a scene on the optical path, wherein the first lens group includes a first-lens-group positive-power lens, and a first-lens-group negative-power lens. A second lens group relays the intermediate image to a final image surface on the optical path, wherein the second lens group includes a second-lens-group positive-power lens, and a second-lens-group negative-power lens. A third lens group may be selectively inserted into the optical path between the first lens group and the second lens group and selectively removed from the optical path. The third lens group includes a third-lens-group positive-power lens, and a third-lens-group negative-power lens.

Abstract: A multi-aperture high-fill-factor telescope is provided. Specifically a multi-aperture high-fill-factor telescope is provided that includes a plurality of sub-aperture telescopes, each sub-aperture telescope being configured to collect electromagnetic radiation from a scene and including first, second, third, and fourth powered mirrors; a set of combiner optics configured to combine electromagnetic radiation collected by the sub-aperture telescopes to form an image of the scene; and a plurality of sets of relay optics, the sets of relay optics are respectively associated with the sub-aperture telescopes and each set of relay optics includes a first flat fold mirror, a trombone mirror pair, and a last flat fold mirror, wherein the last flat fold mirrors are disposed within about a beam diameter of respective exit pupils of the sub-aperture telescopes.

Abstract: A laser system includes an optical path having an intracavity relay telescope with a telescope focal point for imaging an output of the gain medium between an image location at or near the gain medium and an image location at or near an output coupler for the laser system. A kinematic mount is provided within a vacuum chamber, and adapted to secure beam baffles near the telescope focal point. An access port on the vacuum chamber is adapted for allowing insertion and removal of the beam baffles. A first baffle formed using an alignment pinhole aperture is used during alignment of the laser system. A second tapered baffle replaces the alignment aperture during operation and acts as a far-field baffle in which off angle beams strike the baffle a grazing angle of incidence, reducing fluence levels at the impact areas.

Abstract: An apparatus for the focusing of incident light includes a base assembly that is adapted to support a primary mirror. The primary mirror includes an outside circumference and an inside aperture. An upright member is attached to the base assembly at a first end thereof at a first location that is disposed inside the aperture and at a second location that is disposed outside the primary mirror. The upright member includes a second end that is distally disposed with respect to the first end. The second end is adapted to receive a turret that includes a secondary mirror and is adapted to pivot between two positions. An IMU is attached to the base assembly proximate the primary mirror.

Abstract: A multiple aperture imaging system, that includes: a plurality of imaging elements for capturing light; an optical relay assembly for phasing the captured light; a means for diverting the captured light within the multiple aperture imaging system to produce a plurality of images; and an imaging sensor capable of receiving the captured light from each of the plurality of imaging elements.

Abstract: A vari-focal polar alignment scope includes an objective optical system, a relay optical system, and an eyepiece optical system, in that order from the object side. The relay optical system includes an erecting vari-focal viewing optical system, including a positive condenser lens element, and positive second and third relay lens groups which relatively move in the optical axis direction so as to vary the magnification of the polar alignment scope, wherein the following conditions (1), (2) and (3) are satisfied: 6.0<fo/fe<10.0??(1); ?4.0<M2L<?1.0??(2); and 0.2<M3L<0.6??(3); wherein fo designates the focal length of the objective optical system; fe designates the focal length of the eyepiece optical system; M2L designates the lateral magnification of the second lens group of the relay optical system at a low magnification; and M3L designates the lateral magnification of the third lens group of the relay optical system at a low magnification.

Abstract: A force-equalized pivot mount for a telescopic sight such as a riflescope includes a lens holder having a pivot end positioned between a fixed half-socket and an opposing movable half-socket. A resilient member biases the movable half-socket toward the fixed half-socket to pivotally capture the pivot end therebetween. Rotation of the lens holder generates first lateral friction forces at a first sliding interface between the fixed half-socket and the pivot end that are equalized by oppositely-directed second friction forces generated at a second sliding interface between the movable half-socket and the pivot end. Force-equalization prevents the lens holder from walking within the pivot mount, reduces wear at the sliding interfaces, and improves aiming accuracy.

Abstract: A laser beam direction correcting optical system for a surveying instrument comprises a laser light source (1) for emitting a laser beam, an exit angle correcting system (17) for correcting an exit angle of the laser beam emerging therefrom in accordance with an inclination of an instrument main body so that the laser beam is oriented in a specific direction, and an incident angle correcting system provided between the laser light source (1) and the exit angle correcting system (17) to correct an incident angle of the laser beam incident upon the exit angle correcting system in accordance with the inclination of the instrument main body. The exit angle correcting system (17) comprises an objective lens (19), the objective lens (19) being constituted by a variable-focus lens in which a position of a principal plane thereof on an optical axis thereof is fixed and also which can vary a position at which an image of the laser beam is formed.

Abstract: A secondary image formation type view finder comprising an objective optical system, a first mirror for folding an optical axis, a relay lens system and a second mirror for folding the optical axis, wherein an optical axis of the relay lens system is disposed so as to be included in a plane nearly perpendicular to an optical axis of the objective optical system, and the first mirror and the second mirror and disposed nearly in parallel with each other, thereby reducing a space to be occupied by the view finder.

Abstract: A finder optical system has an objective optical system for forming an intermediate image of an object and an eyepiece optical system, and is disposed independent of a photographing optical system. The objective optical system includes a reflecting member. A lens unit situated on the object side of the intermediate image is used as a correcting lens and moved along the optical axis. The finder optical system is thus corrected for diopter and satisfies a condition:0.1<.vertline.1000.times..alpha..sub.F /f.sub.R.sup.2 .vertline.<7.0where .alpha.F is the maximum longitudinal magnification of the correcting lens and f.sub.R is the focal length of the eye-piece optical system.

Abstract: A secondary image formation type view finder comprising an objective optical system, a first mirror for folding an optical axis, a relay lens system and a second mirror for folding the optical axis, wherein an optical axis of the relay lens system is disposed so as to be included in a plane nearly perpendicular to an optical axis of the objective optical system, and the first mirror and the second mirror and disposed nearly in parallel with each other, thereby reducing a space to be occupied by the view finder.

Abstract: A relay lens assembly and a method for manufacturing a relay lens system for an endoscope includes the steps of providing at least one rod member having first and second curved end surfaces, positioning a mold surface at a predetermined distance from one of the curved end surfaces of the rod member wherein the mold surface has a profile which is the negative of a required optical profile to be formed on the curved end surface, filling a space defined by the predetermined distance between the mold surface and the curved end surface with a moldable light transmissive material and solidifying the moldable material to form a molded layer adhered to the curved end surface.

Abstract: An display apparatus has an image displaying device for modulating light by a spatial light modulation element and displaying an image, a relay optical system for forming the image on an imaging plane at a location differing from the image displaying device, an eyepiece optical system for directing the light from the imaging plane to an observer's pupil, and light beam controlling device provided in a portion of the relay optical system for controlling the amount of transmission of a light beam from the image displaying device correspondingly to the inclination of the contrast distribution of the light beam.

Abstract: Apparatus and methods are disclosed for re-imaging a primary image produced by a prime lens to form a positively demagnified secondary image at a secondary image plane, wherein the secondary image is smaller than, but has the same field angle as, the primary image. The apparatus comprises a field lens group and an optical relay. The optical relay can comprise a first lens group having negative refractive power, a second lens group having positive refracting power, and an erecting lens group interposed coaxially between the first and second lens groups. The apparatus also can comprise a beam-splitter imagewise to the optical relay to form multiple secondary images. The apparatus and methods have especial utility for adapting prime lens, designed for use on older, larger TV cameras, for use on newer, smaller TV cameras without sacrificing field angle.

Abstract: A Keplerian zoom finder optical system comprises an objective lens group having a positive refracting power on the whole and constructed of, in order from an object side, a first lens unit having a negative refracting power, a second lens unit having a positive refracting power, a third lens unit having a negative refracting power and a fourth lens unit having a positive refracting power. This finder also comprises a regulating element, disposed in the vicinity of a focal position of the objective lens group, for regulating a visual field. The finder further comprises an eyepiece unit having a positive refracting power. The finder varies a magnification by moving at least the second lens unit along an optical axis and satisfies the following condition:-5<f.sub.3 /f.sub.w <-3wheref.sub.w : the synthetic focal length of the first and second lens units in a minimum magnification state, andf.sub.3 : the focal length of the third lens unit.

Abstract: An endoscope comprising, in order from the object side, an objective optical system and image relaying optical systems disposed in a number of n, and using, in a (n-1)th or nth image relaying optical system, an optical system for producing positive distortion so as to cancel negative distortion produced by the objective optical system, thereby correcting distortion favorably in the endoscope as a whole.

Abstract: A real image mode finder optical system includes an objective lens, a relay lens, and an eyepiece. A plurality of reflecting surfaces is arranged between the objective lens and the eyepiece. At least one of the reflecting surfaces is movable for deflecting an optical axis, and thereby an optical component disposed behind this reflecting surface is moved in accordance with the deflected optical axis. Thus, a variable angle is provided in a wide range from an eye level to a waist level.

Abstract: A finder of a real image type has an objective lens unit having positive refracting power; a first condenser lens unit arranged in the vicinity of a focal face of the objective lens unit on an image side thereof and having positive refracting power; a relay lens unit arranged on an image side of the first condenser lens and inverting an object image provided by the objective lens and the first condenser lens rightward and leftward, and upward and downward; a second condenser lens unit having positive refracting power and arranged in the vicinity of a focal face provided on an image side of the relay lens unit by a combination system of the objective lens unit, the first condenser lens unit and the relay lens unit; and an eyepiece unit arranged on an image side of the second condenser lens unit to observe an image formed by a combination system from the objective lens unit to the second condenser lens unit. The relay lens unit is constructed by one positive lens and two negative lenses. A focal length f.sub.