Abstract: The present disclosure describes systems and techniques relating to computer numerical control (CNC) additive manufacturing. According to an aspect, a tooltip for an additive manufacturing machine includes: an input end configured to receive light from an optical system; and an output end configured to deliver the light to a workpiece on a build platform in the additive manufacturing machine; wherein the output end of the tooltip is configured to be immersed in a liquid resin in a tank of the additive manufacturing machine, and the output end defines a linear opening through which the light is delivered to the workpiece on the build platform.

Abstract: In an implementation, a virtual reality (VR) headset can include a plurality of structural components. Each structural component can be formed from a respective cardboard sheet. The plurality of structural components can include a plurality of flaps that define an opening for placement of the VR headset near or against a face of a user in a first configuration, an internal wall of the VR headset, a bottom wall of the VR headset, a lens frame assembly, a top wall of the VR headset and an enclosure flap hingeably coupled with the bottom wall of the VR headset. The enclosure flap can, in a first configuration, secure an electronic device in the VR headset against the internal wall. In a second configuration, the enclosure flap can enclose the plurality of flaps that define the opening between the internal wall and the enclosure flap.

Abstract: The invention relates to a binocular telescope with two lens barrels, which for focusing comprise axially displaceable focusing means, and with a joint focusing device, wherein the focusing device comprises a housing and a rotary knob and the rotary knob is axially displaceable on the housing, wherein the rotary knob is rotatably coupled in a focusing position to a focusing gear and is rotatably coupled in a diopter balancing position to a diopter gear, wherein the rotary knob comprises a locking mechanism for fixing the rotary knob in the focusing position.

Abstract: The present invention relates to a new type of collapsible virtual reality headset to view a three-dimensional environment on a smart device that can be folded into a self-contained package for compact storage and ease of portability. Through its design of structural folds, the collapsible virtual reality headset offers portability, durability, and adaptability to be mounted to headphone, headgear, and/or to be used with a haptic device. Users of the invention download software applications onto their smart devices and use this display apparatus to view the virtual stereoscopic images or video through left and right lens systems. Users of this invention can adjust the pupillary distance and the distance between the lenses from the smart device display for optimal user comfort. The invention is made up of material that makes it water resistant and may be stored in one's bag or pocket when configured in its compact form.

Abstract: A portable virtual reality glasses for accommodating an electronic device is provided. The portable virtual reality glasses includes a frame and a spectacle frame assembly assembled with optical lens. The frame includes a first cover, a second cover, a first side plate body, and a second side plate body. The first cover, the second cover, the first side plate body, and the second side plate body are connected with each other to define an accommodation space. By relatively moving the first side plate body and the second side plate body with respect to the first cover and the second cover, the frame can be transformed to either an extended state or a folded state, to change a volume of the accommodation space. The spectacle frame assembly is connected with the frame, for moving relative to the accommodation space of the frame.

Abstract: A long-range optical apparatus, particularly a binocular having two tubes for accommodating long-range optical devices, includes a first folding bridge, a second folding bridge, and preferably a third folding bridge. The folding bridges are pivotably arranged between the tubes of the long-range optical device and each include a first and a second bridge element associated with each other and pivotable relative to each other. At least one folding bridge has a fit that prevents mechanical contact of the bridge elements to each other at least in regions of the pivoting range of the bridge elements.

Abstract: An opto-mechanical deployable telescope includes a hub, at least one deployable multiple petal primary mirror mounted to the hub, a deployment assembly, and a deployment engine assembly. The deployment assembly is operable to move the at least one primary mirror between a stowed position and a deployed position. The deployment engine assembly is operable to power the deployment assembly using stored mechanical energy. The deployment assembly includes a kinematic or semi-kinematic interface between the hub and the at least one primary mirror to hold petals of the at least one primary mirror in alignment relative to each other in the deployed position.

Abstract: A binocular has a folding bridge for adapting the distance between the eyepieces to the interpupillary distance of the eyes of the user. A synchronous focusing of the two telescopes is brought about via a differential gear assembly which drives respective spindle drives for corresponding ones of the two telescopes. The conversion of the rotational movement into an axial linear displacement of the focusing element of the optics occurs only at the end of the corresponding spindle drive.

Abstract: A telescope comprises a folding reflector comprising a plurality of sections configured to fold at a plurality of substantially parallel hinges, a support structure configured to support at least two of the plurality of sections of the folding reflector and further configured to fold at one of the plurality of substantially parallel hinges, a corrector assembly configured to deploy from a stowed position in which an optical axis of the corrector assembly is substantially parallel to the parallel hinges to a deployed position in which the optical axis is substantially perpendicular to the folding reflector when the folding reflector is deployed. The telescope further comprises a hexapod configured to stow and deploy the corrector assembly.

Abstract: An optical device may include at least one optical element and a coupling section adapted to control relative movement between the at least one optical element and the coupling section. The coupling section may include an engaging element and a detent mechanism adapted to adjustably lock the at least one optical element in a plurality of rotational positions. The rotational positions may include rotational positions around a first axis that is substantially perpendicular to a second axis of the at least one optical element, the second axis being a substantially longitudinal axis of the at least one optical element.

Abstract: A deployable thin-film mirror telescope comprises a base structure and a metering structure. The base structure houses a thin-film mirror, which can be rolled for stowage and unrolled for deployment. The metering structure is coupled to the base structure and can be folded for stowage and unfolded for deployment. In the deployed state, the unrolled thin-film mirror forms a primary minor for the telescope and the unfolded metering structure positions a secondary minor for the telescope.

Abstract: First, a position control mechanism having a fixed part and a movable part, and a driver that changes position of the movable part relative to the fixed part is prepared. Next, a manufacturing unit having first and second holders and a coupler that couples the first and second holders is prepared. A conductive actuator is held in tension between the first and second holders. Further, the first holder is attached to the movable part and the second holder is attached to the fixed part. After that, the coupler is cut from the manufacturing unit, the first and second holders are separated from each other.

Abstract: The invention relates to an optical observation apparatus (1) with at least one observation beam path (4) and with means (7) for laser range-finding, which have at least one transmitting device (8) and at least one receiving device (9) and are arranged outside the at least one observation beam path (4). The transmitting device (8) and the receiving device (9) are arranged in each case in separate housing parts (10a, 10b) of the optical observation apparatus (1) and/or, if a folding bridge (5) of the optical observation apparatus (1) is present, along a mid-axis (6) of the folding bridge (5). At least one diffractive optical element (9b) is provided for shaping at least the receiving beam (9a) for the at least one receiving device (9).

Abstract: A holder for field glasses has a pair of substantially similar resilient receptacles that each has a main body with an open bottom and a narrower neck with an open top. A slot is located in each neck portion while a slit extends between each slot and its respective open bottom. The two receptacles are attached to each other so as to be parallel to one another and so that each slit generally faces the other receptacle. A pair of binoculars is inserted, ocular lens side first, through the bottoms of each main body by gapping each receptacle with the bridge of the binoculars passing through the gapped slits. Once the bridge is received within the slots of the two receptacles, the slits are degapped. Alternately, the binoculars themselves may have the form of a pair of drink receptacles.

Abstract: An erecting prism of a binocular includes a first and a second prism, which are held by a holder, and the holder being supported vertically movable and laterally immobile with respect to a thin plate. The thin plate is supported laterally movable and vertically immobile with respect to a right moving body. A shaft reception means is provided, for rotatably supporting a jig, at the right eyepiece cylinder that is attached to the rear wall 303B of the right moving body. The position of erecting prism is adjusted by using a jig to move the holder vertically with respect to the thin plate, and to move the thin plate laterally with respect to the right moving body. The jig may be supported by the shaft reception means and rotated.

Abstract: A structure for assembly of a binocular telescope with a photographing function, comprises a lower frame, an upper frame, and an engaging mechanism. A pair of telescopic optical systems is mounted on the lower frame. A photographing unit is mounted on the upper frame. A first part of the engaging mechanism is provided on the lower frame. A second part of the engaging mechanism is provided on the upper frame. The first part and the second part are connected by assembling the upper frame onto the lower frame in such a manner that the photographing unit is placed between the pair of telescopic optical systems.

Abstract: A compact spotting scope includes a housing with an outer surface having a grasping region sized and shaped to fit in the palm of a user's hand so that the spotting scope can be held at eye level with one hand in an ergonomic arm and wrist position for steady support. An optical element positioned within the housing is adjusted by manually rotating a side-mounted adjustment knob that extends laterally from the outer surface of the housing opposite the grasping region. The side-mounted position of the adjustment knob allows the arm and wrist of the focusing hand to be maintained in an ergonomic position during manipulation of the adjustment knob, thereby further facilitating steady support. An internal support member of the spotting scope includes a frame portion and a generally tubular portion, which are preferably formed together of unitary one-piece construction for aligning optical elements of the spotting scope.

Abstract: The invention is a combination optics cover and extendable baffle. One version has at least one flap repositioned from a folded covering position to an extended baffle position. Each flap is repositioned to the extended position by a means for deployment when freed from a restraint implement. Another version has an inner baffle slideably encased axially within an outer baffle. The inner baffle is urged to telescope axially outward from a retracted position to a fully extended position by a deployment implement freed from a restraint implement. The abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Abstract: Binoculars doubling as a toy, in particular, various spherical shapes such as a soccer ball or baseball. These binoculars have lens barrels ejected from hemispherical bodies to increase the field of vision up over a long distance. The binoculars doubling as a toy may be constructed with hemispherical bodies 1 and 21 defining a complete global shape when coupled with each other, connected to each other by a hinge 15; eye lens barrels 6 and 26 each having eye lenses 5 and 25 and mounted to centers of arc sections 2 and 22 of the bodies 1 and 21; circular plates 7 and 27 mounted into grooves 3 and 23 formed in the arc sections 2 and 22; objective lens barrels 10 and 30 each having objective lenses 9 and 29 and inserted into through holes of the circular plates 7 and 27; and springs 13 and 33 each mounted between the eye lens barrels 6 and 26 and the objective lens barrels 10 and 30.

Abstract: A microscope formed from a single, flat, relatively thin, injection molded plastic blank employs living hinge technology. The blank has eight living hinges that cooperate with slots, hooks, and detents, such that when folded in a prescribed sequence, produces a unitized microscope body.

Abstract: The present invention relates to a mounting system for mounting a camera, or other similar devices, for afocal photographic viewing through a telescope eyepiece providing an attachment for the telescope which allows attachment of the telescope eyepiece and a yoke which locks and supports a supporting rail along which is mounted a camera platform which is designed to be adjustable to bring the camera or other light receptor device into axial alignment with the eyepiece of the telescope quickly and to hold the device in fixed axial alignment. The invention permits adjustment with four aspects: lateral perpendicular mutually exclusive movement in two axes to the optical axis; longitudinal movement along the optical axis; and tilting or pivoting movement in one of the two lateral perpendicular axes.

Abstract: A viewing instrument that has a collapsed configuration and an expanded configuration. The viewing instrument includes two lenses that are located within a housing when the viewing instrument is in its collapsed configuration and at least a portion of each of the lenses is located outside of the housing when the viewing instrument is in its expanded configuration.

Abstract: A portable optical device comprises an optical-system mount plate, a control circuit board, and an inner frame. The inner frame has first pillar elements, and second pillar elements. The first pillar elements are provided for supporting the optical-system mount plate. The second pillar elements are provided for supporting the control circuit board. The first and second pillar elements are constructed in such a manner that the optical-system mount plate is disposed between the inner frame and the control circuit board.

Abstract: Optical loupes are disclosed which include eyepieces (21) having an ocular (40) and an objective (42). A transfer tube (44) is mounted for transferring light between the ocular (40) and objective (42). The objective (42) is arranged at an obtuse angle with respect to the ocular and the ocular and objective are in side by side relationship. The transfer tube includes a transfer means having mirrors for transferring light from the objective to the ocular. A light source (38) including a plurality of diodes (100) is mounted between the eyepieces (21) of illuminating a work area. The eyepieces (21) can be adjusted in the interpupliery direction by adjustment nobs (35) which engage in slots (34) on a support bar (22) which hold the eyepieces (21).

Abstract: An erecting prism of a binocular includes a first and a second prism, which are held by a holder, and the holder being supported vertically movable and laterally immobile with respect to a thin plate. The thin plate is supported laterally movable and vertically immobile with respect to a right moving body. A shaft reception means is provided, for rotatably supporting a jig, at the right eyepiece cylinder that is attached to the rear wall 303B of the right moving body. The position of erecting prism is adjusted by using a jig to move the holder vertically with respect to the thin plate, and to move the thin plate laterally with respect to the right moving body. The jig may be supported by the shaft reception means and rotated.

Abstract: A binocular telescope comprises right and left slide plates, and right and left mount plates disposed on the right and left slide plates. Right and left telescopic optical systems are mounted on the right and left slide plates which can be moved to adjust interpupillary distance for a user. A part of the right telescopic optical system is mounted on the right mount plate, and a part of the left telescopic optical system is mounted on the left mount plate. The right and left mount plates are moved along the optical axes of the right and left telescopic optical systems, to perform a focusing operation. The right and left slide plates have straight portions extending parallel to the optical axes. The right and left mount plates have right and left guide shoes slidably engaged with the straight portions.

Abstract: A telescope system facilitates easy upgrading from friction lock mounting to manual worm drive, and from manual worm drive to motor drive. Vibration isolation provides a steady field of view for enhanced observation and photography. A telescope mount facilitates enhanced below the horizon and zenith viewing. A tripod has detents which hold the legs thereof in a deployed position during handling of the tripod. A cam lock reliably maintains a desired length of telescoping tripod legs.

Abstract: A telescope (1) with inclined viewing relative to the axis of sight (2) has a sighting device (4) with a mounting (8) that is adapted to be inserted in or removed from a recess (9) on the telescope housing (6) at an inclined portion (5) such that the sighting device (4) is disposed on the side adjacent the eyepiece (3).

Abstract: Binoculars doubling as a toy, in particular, various spherical shapes such as a soccer ball or baseball. These binoculars have lens barrels ejected from hemispherical bodies to increase the field of vision up over a long distance. The binoculars doubling as a toy may be constructed with hemispherical bodies 1 and 21 defining a complete global shape when coupled with each other, connected to each other by a hinge 15; eye lens barrels 6 and 26 each having eye lenses 5 and 25 and mounted to centers of arc sections 2 and 22 of the bodies 1 and 21; circular plates 7 and 27 mounted into grooves 3 and 23 formed in the arc sections 2 and 22; objective lens barrels 10 and 30 each having objective lenses 9 and 29 and inserted into through holes of the circular plates 7 and 27; and springs 13 and 33 each mounted between the eye lens barrels 6 and 26 and the objective lens barrels 10 and 30.

Abstract: A stereoscopic viewing apparatus for viewing side-by-side complimentary stereoscopic image pairs of various sizes to produce a three-dimensional effect, the stereoscopic viewing apparatus comprising a pair of left and right spaced-apart ocular windows and variable septa.

Abstract: An image deviation correcting device and an optical apparatus having such a device. The device includes: a driven part to be driven so as to correct an image deviation; a holder for holding the driven part; a first linkage arranged perpendicular to the optical axis of the driven part, the first linkage having four arms connected in a parallelogram, one of the arms being secured to the holder; a middle part secured to opposite arm thereof; a second linkage overlapped with the first linkage in parallel relation thereto, the second linkage having four arms connected in a parallelogram, one of the arms being secured to the middle part; and a base part secured to opposite arm thereof. The one of the arms of the first linkage is generally perpendicular to the one of the arms of the second linkage.

Abstract: A binocular assembly that includes a hands free support mechanism for supporting the binoculars in front of the user's eyes without using any of the user's hands. The hands free support mechanism includes an adjustable head securing strap and a pair of positioning arms. Each of the pair of positioning arms rigidly extends from one of the binocular elements of a user adjustable binocular assembly at an angle “A” of between twenty-five and forty-five degrees.

Abstract: A protective assembly structured to protect an optical device, such as a pair of binoculars that include a pair of lenses, a pair of eye pieces, and a main body having at least a pair of interconnecting shafts extending from the lenses. The protective assembly itself includes a resilient material housing having a first and a second housing segments structured to receive a corresponding interconnecting shaft of the optical device snugly and protectedly therein.

Abstract: A binocular assembly which is held in optical alignment with a human being's eyes and without the use of a human being's hands. The binocular assembly includes a support member, a pair of optical systems positioned and mounted on the support member for magnifying items within view of the human beings eyes, an adjustment to laterally adjust and position the pair of optical systems laterally relative to one another to accommodate spacing between the human beings eyes, and a fastener for engaging the human being's head and securing the binocular assembly about the head of the human being.

Abstract: Binoculars has a pair of body units, lens cover members and lens cover member control mechanism. The body units have a lens each and are relatively movable between a first position in which the body units are not used and a second position in which the body units are used. The lens cover members are movable, at the fronts of the body units, between a protective position in which the respective lenses are not exposed to an outside and a retracted position in which the respective lenses are exposed to the outside. The lens cover member control mechanism latches the lens cover member to the protective position when the units bodies are set to a first position in which they are not used and releases the latching of the lens cover members in interlock with the movement of the body units from the first position to the second position and, by doing so, moves the lens cover members to the retracted position.

Abstract: The present invention is usable as a stereoscopic visual unit capable of obtaining fine stereoscopic effects and also usable as binoculars, by provided with a first housing 11 that has a pair of convex lenses 12 and 13 and disposed at a specified space and having mutually almost parallel optical axes; and a second housing 20 that has a supporting part 25 supported swingable to the first housing for keeping a pair of pictures to be stereoscopically viewed on the optical axis of each convex lens in its first swing position, and a pair of concave lenses 26 and 27 disposed on the optical axis of each convex lens, a specified distance apart from each convex lens in its second swing position.

Abstract: A viewer that creates an enhanced and immersive image is disclosed. Also disclosed is a novel collapsible viewer that assembles into a substantially rigid structure to maintain proper optical alignment of the lenses and the image(s). This viewer also excludes extraneous light, while allowing the user to focus the device to compensate for variations in eyesight of the users. Also disclosed is a novel means for interchanging images and locking them into optical alignment with the lenses of the viewer.

Abstract: A sturdy, reusable and collapsible viewing instrument for assisting in viewing distant objects that is assembled from a blank. The blank comprises two pivoting frames in which ocular and objective lenses are affixed. Domains of the blank are foldable along pre-etched fold lines to form parallel sides of the viewing instrument. Ideally, the blank dimensions approximate those of a standard credit card so that the viewing instrument may be stored in one's wallet or purse.

Abstract: An optical device, preferably in the form of a pair of folding binoculars (10) includes a front support (12) with a first optical means in the form of a pair of front lenses (25). A second optical means in the form of a pair of rear lenses (27) are supported by a rear support (14). Both the front support (12) and the rear support (14) are pivotably mounted to a spacing means (16) extending between the front support (12) and the rear support (14). The supports (12,14) are pivotably mounted to the spacing means (16) about respective mounting edges (17,18). The supports (12,14) each have a free edge (20,22) located opposite the respective mounting edges (127,18), enabling the support (12,14) to be folded from an operative configuration to a storage configuration. The optical device (10) may also include a releasable holding means (35, 36, 37, 38, 39, 39a, 39b) to hold the front support and the rear support in the operative configuration.

Abstract: A collapsible binocular foldable between an open operable position and a closed position made of a semirigid material. The foldable binocular includes an objective lens panel, an ocular lens panel and top and bottom panels hingedly connected to the objective and ocular lens panels. A lateral flap is attached to and extends outward from the lateral edges of the front panel. The objective, ocular and top and bottom panels define the side opening which is generally trapezoidally shaped in the open position. The lateral flaps include a middle portion which is likewise generally trapezoidally shaped and which covers the side openings when the binocular is in the open position. The lateral flap has a length which is greater than a length of the side openings so that when the lateral flap is closed to cover the side openings, the flap will engage the ocular lens panel to prevent overinsertion.

Abstract: A collapsible stereoscopic viewer includes a generally rectangular housing formed of parallel sides and top and bottom surfaces all pivotally secured to form a collapsible rectangular. A pair of internal walls are similarly secured between the top and bottom surfaces to form two optical channels within the housing. A pair of lens supports are pivotally coupled to the housing interior and may be secured therein using a tab and slot attachment. Each lens support receives and supports a conventional eyepiece lens. A pair of front walls are pivotally secured within the housing interior and may be locked into a vertical position by a tab and slot arrangement. Each front wall defines an aperture aligned with one of the eyepieces. The housing further includes a pair of downwardly extending curved arms which support a pivotally coupled planar image plane movable between a vertical and horizontal position upon the arms.

Abstract: A binocular includes two parallel telescope systems. Each telescope system includes an objective system, an erecting system and an eyepiece system. The erecting system and the eyepiece system of each telescope system are part of a movable unit which is movable toward and away from a front-most lens of the objective system. The movable unit can be moved towards the front-most lens to a position in which an object cannot be viewed through the telescope system.

Abstract: A kind of foldable binoculars includes a substantially L-shaped first bracket including a first bottom plate having a first side and a second side, and a first side plate defining two first viewing holes and having a first side extending from the second side of the first bottom plate and a second side. A substantially L-shaped second bracket includes a second bottom plate having a first side pivotally connected with the second side of the first side plate and a second side, and a second side plate defining two second viewing holes and having a first side extending from the second side of the second bottom plate and a second side pivotally connected with the first side of the first bottom plate. Two concave lenses are each mounted on a corresponding one of the two second viewing holes.

Abstract: A binocular includes two parallel telescope systems, two slide frames on which the telescope systems are respectively supported, and two shells, one fixed to each of the slide frames covering the telescope systems. The slide frames are supported by an I-shaped frame consisting of top and bottom members and a center block is provided between the top and bottom members. The slide frames between the top and bottom members so that the slide frames are slidable.

Abstract: A viewer having a collapsed condition and a viewing condition. The viewer includes a front and rear wall formed of a flexible material and joined together at their top and bottom edges. The front wall includes a pair of images disposed on the interior surface of the front wall, while the exterior surface includes a reflection print. The rear wall includes a pair of viewing apertures having lenses in optical registration with the pair of images. A middle wall is disposed intermediate the front and rear walls and is joined together with the rear wall at their bottom edges. The middle wall includes at least one aperture in optical registration with the pair of images. The front and rear walls move between the viewing condition wherein the front and rear walls flex to define convex curves and the pair of images are viewable through the pair of viewing apertures, and the collapsed condition wherein the interior surfaces of the front and rear walls abut the middle wall.

Abstract: A spherical binocular capable of being conveniently portable and suitable for use for watching a game in a baseball stadium, a soccer ground or the like. Two hemispherical shells are foldably or pivotally connected together into a spherical configuration. The hemispherical shells each are formed at a center thereof with an ocular through-hole, in which an ocular concave lens is fitted. A front plate is fitted in a front opening edge of each of the shells and formed at a center thereof with an objective opening, in which an objective convex lens is arranged so as to be aligned with the objective convex lens. When the hemispherical shells are folded over each other to align the front opening edges with each other, a holding pawl and holding groove of one of the hemispherical shells are fittedly engaged with a holding groove and a holding pawl of the other of the hemispherical shells, respectively.

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 collapsible binocular comprising a substantially rectangular-faced open-sided housing having a front wall formed with a pair of objective lens apertures and a rear wall formed with a pair of eyepiece lens apertures is provided. A top wall, a bottom wall with an intermediate transverse fold line, the front wall and the rear wall of the housing are integrally connected and a flap is integrally connected to the front wall for attaching the front wall to under side of a visor extending from the top wall. A left side wall member and a right side wall member are integrally attached to the front wall or to the rear wall such that the front wall or the rear wall, respectively, play the role of a centered portion. When the binocular is assembled, any pairs of objective lens apertures will be in alignment with any pairs of eyepiece lens apertures.

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.