Abstract: A lens barrel attachment including an attachment ring and a handle in which a click pin is housed. The attachment ring is rotatably fitted on a large-sized lens barrel. The handle is threadingly fitted in a handle hole formed in the attachment ring and extending in a radial direction thereof. The click pin is provided in an accommodation hole formed in the handle and urged by a spring to be engaged with engaging recesses formed on an outer surface of the lens barrel. The handle has a contact portion at the tip portion thereof. This contact portion is brought into frictional contact with the lens barrel to thereby fix the lens barrel to the attachment ring.

Abstract: A conical lens mount having a snap-in lens clamp is disclosed. The lens mount has a hollow, truncated generally conical configuration with the lens mounted at the apex of the lens mount. The base portion of the conical lens mount defines a reference plane for use in an optical system. Preferably, the conical lens mount has integrally formed spring members for maintaining the lens mount and its reference plane at a predetermined position in an optical system. The conical lens mount finds particular application in an athermalized optical system.

Abstract: A lens assembling structure including a lens system and a holding member for holding each lens element, a particular lens element in the lens system including a lens function surface and an abutting surface. The abutting surface is designed such that an inclination center due to decentering is located on the optical axis and at a point where aberration deterioration due to inclination is reduced.

Abstract: A functional ring having the particular characteristic of comprising, in various forms of decorative elements indicative of cardinal orientation or temperature, as well as differently formed lens elements in order to confer a true and proper utility to an object. Specifically, a ring is disclosed including a solid transparent sphere for magnification of objects seen therethrough.

Abstract: A mount for magnifying lenses including a U-shaped clip having front and rear panels with the front panel relatively shorter than the rear panel and with the lower edge of the front panel pivoted to the rear leg of an L-shaped bracket. The bracket includes a forward leg extending from the rear leg and terminating in a forward edge having a slot therein opening into an interior pocket adapted to receive a mounting tab of a magnifying lens.

Abstract: A code plate mounting device for mounting a code plate on an outer peripheral surface of an annular member in a lens barrel. A pair of engaging portions are provided on the outer peripheral surface of the annular member, and are spaced from one another in a circumferential or axial direction of the annular member. A tension member is connected at one end to one end of the code plate. An engaging portion is provided on the other end of the code plate to engage with one of the engaging portions of the annular member. An engaging portion is provided on the other end of the tension member to engage with the other engaging portion of the annular member.

Abstract: The invention relates to a reflection aid (1) intended to increase the ability of users to see, without the inconvenience of spectacles, for example when applying a make-up, which comprises an optical lens (3) capable of attachment to a mirror (4) of the kind in question by means of a fastening device (5). Said lens (3) is attached to the mirror attachment device (5) in such a way that the lens (3), when in the position (A) ready for use, can be set to the desired distance (L) from the mirror (4).

Abstract: Apparatus for detachably securing a night vision goggle mount to a protective helmet visor housing in which the heads of a pair of upper fasteners carried by the mount are adapted to be inserted through the head receiving portions of a pair of upper keyhole slots in a base plate on the housing against the action of a leaf spring on the plate. When the shanks of the fasteners are moved into the lower head-retaining portions of the upper slots, the upper fastener heads are held by ears on the leaf spring to lock the mount. A releasing element on the base plate is adapted to be actuated to flex the spring to a position at which the spring ears are clear of the upper fastener heads to permit the mount to be removed. Preferably, a pair of lower fasteners having heads and a pair of corresponding lower keyhole slots are provided to insure stability and alignment of the night vision goggle mount.

Abstract: An optical disc driving device for use in an optical disc apparatus is equipped with an objective lens, a lens holder for holding this lens, and upper and lower support springs for supporting the lens holder. Each support spring consists of a pair of conductive springs which are electrically separated from each other in a plane. Each pair of conductive springs includes straight spring sections extending straight to pass a central axis which is parallel to the optical axis of the lens holder and which passes the center of gravity of the same. End portions of these conductive springs are joined to the lens holder by means of rubber members.

Abstract: A viewer for inspecting the condition of an end face of an optical fiber which has been cleaved, while the fiber is still in the cleaving device. The viewer takes the form of a pocket-type microscope having a cylindrical body with an eyepiece at one end and an objective lens at the other end, and an adaptor at the end of the body having the objective lens. The adaptor has a plurality of legs having notches therein forming seats which are specially adapted to be mounted on fiber-supporting pads of the cleaver. The adaptor is removable from the body so that different adaptors may be used for different cleavers. The body fits in a socket of the adaptor which may be disposed at an angle with respect to the legs to allow oblique viewing of the fiber end face while it is still in the cleaver. The viewer may optionally be used with an inspection tray having a trunnion at one end, the adaptor of the viewer being designed to pivotally mount to the trunnion, allowing viewing of the fiber end face at any angle.

Abstract: The invention relates to an arrangement known generally as a PC-adapter or shift adapter. The objective is mounted on one component of the arrangement which can undergo a pivot movement relative to the image format thereby making possible the necessary movement of the objective relative to the image format. The pivot point is disposed as far as possible from the optical axis and outside of the beam pass-through opening of the arrangement.

Abstract: A helmet system comprising a helmet (11), a vizor (13) pivotally mounted on the helmet, and mounted on the vizor (13), an electro-optical system, e.g. a night vision goggle, including an eyepiece (33) positioned between a transparent part (19) of the vizor and the user's eye so as to provide the user with a view of a scene forward of the user through the eyepiece, the eyepiece also serving as a combiner to provide the user with a virtual image of a display produced by the electro-optical system superimposed on his view of the forward scene through the eyepiece.

Abstract: A head support assembly is disclosed which may be worn continuously whenever it may be desirable to mount optical equipment, such as night vision goggles, on the head of a person. The head support assembly includes a main head piece which has a relatively rigid portion in the front and more flexible side and top pieces for fitting to a variety of head shapes. Webbing members connect the head piece to a chin piece and are of adjustable nature to provide strong securement to the wearer's head while permitting adjustment.

Abstract: A telescope housing has a removable finger accommodating ring secured thereto. The ring is coupled to the housing by a post having left and right flanges with upstanding distal ends opposedly projecting from one end of the post to be inserted into an aperture located in a latch on the ring. In this manner, various telescope assemblies of different magnification can be accommodated by the use of the removable ring which also enables convenient storage.

Abstract: A thermal camera is mounted within a helmet and is arranged such that the optical path in free space from its output is wholly within the volume defined by the helmet and the helmet faceplate. The output iminges on a concave mirror/lens combination located below the wearer's sightline. The arrangement is particularly suitable for fire fighting and search and rescue applications.

Abstract: The invention relates to an arrangement known generally as a PC-adapter or shift adapter. The objective is mounted on one component of the arrangement which can undergo a pivot movement relative to the image format thereby making possible the necessary movement of the objective relative to the image format. The pivot point is disposed as far as possible from the optical axis and outside of the beam pass-through opening of the arrangement.