Abstract: A lens hood for a camera, includes a sun shade projecting in front of the camera lens and/or at least one hood wing which can pivot about a vertical or horizontal pivot axis. Included is a three-dimensional structure with a basket-like holder for the sun shade and a fastening means, which defines the vertical or horizontal pivot axis and can pivot, for the hood wing.

Abstract: An apparatus for sun shielding for telescopic sights and binoculars incorporating a shutter mechanism to both protect the sighting system and to vary the light entering the sighting system.

Abstract: It is an object of the present invention to mount a focusing mechanism of a camera device on a vehicle without bringing the mechanism in contact with a worker's hands in an in-focus state of a lens system in the camera device having an eyelid part for preventing stray light covering part of a lens, and to improve the beauty and increase mounting flexibility. In a camera cover according to the present invention, a cylinder body (21) of the camera cover (10) covers most including the first half portion of the volume of the camera device, and the cylinder body (21), a frame body (23), an eyelid part (25) and/or an eyelid part (26), and a housing part (27) are integrally molded. Beauty seen from the front can be improved, and the beauty will not be spoiled when the camera device (12) is displaced together with the camera cover (10) and mounted.

Abstract: In order to attach a lens hood 100 to a lens body 200 while positioning the lens hood 100, fixing convex portions are provided on the lens hood 100 and fixing uneven portions 204 are provided on the lens body 200. On the fixing uneven portion 204 of the lens body 200, a positioning slope coming into contact with the fixing convex portion of the lens hood 100 upon attachment is provided on a position where a convex portion and a recessed portion are formed continuously on the lens body 200. Thus it is possible to facilitate attaching and detaching with a simple configuration while obtaining placement accuracy in the circumferential direction of a lens and in a thrust direction.

Abstract: A lens hood for a camera lens has a mounting barrel and a holding ring. The mounting barrel is hollow, is movably mounted around the camera lens and has an internal surface, a front end, a rear end, a sliding recess and at least one detent. The sliding recess if formed in the internal surface of the mounting barrel and has two ends. The at least one detent is formed adjacent to, communicating with and deeper than the sliding recess; two detents may be formed respectively at the ends of the sliding recess. The holding ring is resilient, is mounted securely around the cameras lens, is mounted in and presses the sliding recess and is selectively mounted in the at least one detent to allow the holding ring to relax and prolong usage lifetime.

Abstract: A light shielding device of a lens includes a movable barrel; an outer member positioned around the movable barrel; and a light shield ring for preventing ambient light entering the lens through a clearance between the movable barrel and the outer member, the light shield ring having a center opening through which the movable barrel is movably fitted and a self-centering annular portion around the center opening. The self-centering annular portion is in contact with an outer surface of the movable barrel and is bent by, and along, the outer cylindrical surface of the movable barrel. The light shield ring is biased against an annular part of the outer member by a biasing member, so that the light shielding ring is movable in a radial direction when a radial force is applied to the light shielding ring via the movable barrel and the self-centering annular portion.

Abstract: A light shade is provided for partially blocking ambient light from a display panel. The light shade includes a shade portion and a position portion. The shade portion is configured for partially blocking the ambient light. The positioning portion is formed on a side of the shade portion. The shade portion includes at least one baffle. The positioning portion is configured for attaching the shade portion to the display panel. The positioning portion comprises a track and a plurality of blocks formed on an inner side and an outer side of the track. When the shade portion is attached to the display panel, the at least one baffle engages with at least one side of the display panel.

Abstract: An adjustable winged eyecup allows the user to apply it to many makes and models of existing and new optics. The winged eye cup is essential for eliminating light and elements while using an optical device such as a binocular or monocular. The winged eyecup can also provide a constant eye relief for the optical device. It is designed to be removable and the same winged eyecup can be applied to many different makes and models of optical devices.

Abstract: A camera lens cap includes radially movable latch members carried on an endwall of the cap and apparatus having exposed user engageable surfaces. The latch members are movable between the first latching position and a second unlatched position relative to an adapter which has a camera lens attachment feature. An interior groove formed in the adapter and engageable by the latch members when the latch members are disposed in the first latching position to affix the lens cap on the adapter and the camera lens.

Abstract: An apparatus for sun shielding for telescopic sights and binoculars incorporating a shutter mechanism to both protect the sighting system and to vary the light entering the sighting system.

Abstract: A new and useful structure that provides a simple and efficient lens cover for an optical sight, particularly a hooded optical sight. A lens cover structure comprises a lens cover frame, or a pair of lens cover frames, with lens covers designed to cover and uncover the lens openings in an optical sight, particularly a hooded optical sight. Each lens cover is biased toward a covering position in which it covers a respective lens opening in the hood, and is moveable against its bias to an uncovered position in which it uncovers a respective lens opening in the hood. According to a preferred embodiment, the lens covers are configured to be in predetermined orientations relative to the hood, when the lens covers are in their uncovered positions. In addition, a preferred embodiment is designed to enable the lens covers to be conveniently manipulated by the “off hand” (a shooters term describing the hand that is not responsible for fire control).

Abstract: The present disclosure is generally directed towards methods and devices for reducing or eliminating reflection-illuminated artifacts. The methods and devices in several embodiments can include providing a transparent lens cover with a blocking member for reflecting or absorbing internally-reflected light. The lens cover can be attached at the distal end of an endoscope, cannula, and/or lumen in some embodiments. Alternatively, the lens cover can be a permanent part of the endoscope, lumen, and/or cannula.

Abstract: A push-pull type camera module for a portable wireless terminal in which a hollow outer lens barrel is installed in the portable wireless terminal, a push-pull switch is installed in the outer barrel, an inner barrel is installed in the outer barrel, the inner barrel extending from or retracting to the outer barrel by the push-pull switch, a lens assembly is exposed at an outer surface of the inner barrel, the lens assembly taking a picture when the inner barrel is extended, a first switching module detects the extension and retraction of the inner barrel, and a second switching module detects rotation of the extended inner barrel.

Abstract: An optical viewing instrument is disclosed generally comprising an eyecup with a cylindrical surface and a housing with an ocular lens portion that has a corresponding cylindrical surface for slidably receiving the eyecup. The ocular lens portion has bearings protruding therefrom, and the eyecup includes longitudinal channels for receiving the bearings as the housing receives the eyecup and curvilinear channels for accommodating the bearings as the eyecup is rotated. In certain embodiments, the ocular lens portion also includes a detent, and the eyecup has a plurality of grooves into which the detent clicks as the eyecup is rotated. In some embodiments, the curvilinear channels are spiral shaped to cause axial motion of the eyecup when rotated.

Abstract: A lens cover apparatus comprises a mounting structure, a lens cover, a pivot joint structure, and a spring. The mounting structure is configured for securing the lens cover apparatus to a support structure. The pivot joint structure is coupled between the mounting structure and the lens cover and configured for allowing multi-axis articulation of the lens cover with respect to the mounting structure. The spring is coupled between the pivot joint structure and the lens cover. The spring and the pivot joint structure are jointly configured for causing spring-biased multi-axis articulation of the lens cover between a use position thereof and a stowed position thereof in response to manual initiation of the articulation.

Abstract: In an exemplary embodiment, an LCD screen hood is provided for use with digital cameras. The hood includes a hood tube that defines a light blocking sidewall having an open camera end and an opposite viewing end and enclosing a longitudinally extending viewpath therebetween. An eyepiece mounted on the viewing end includes an eyepiece lens for enlarging an image on an associated LCD screen disposed at the camera end of the hood tube. An eye cup is mounted on the eyepiece for shielding the eyepiece lens from ambient light. An objective tube fixed to the hood tube carries a three piece objective lens mounted between the eyepiece lens and the camera end of the hood tube. Magnification of the eyepiece lens varies as appropriate between 1× and 2.5×. Rotation of the eyepiece tube provides for diopter adjuxtment.

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: A shell structure is for containing one of a plurality of optic-lenses with different assembling positions to respectively assemble different kinds of optic equipments. The shell structure comprises an optic-lenses assembling frame and a containing shell provided with an assembling hole. The optic-lenses assembling frame is vertically assembled into the assembling hole and comprises a frame body provided with a frame center axis and a perforating hole formed within the frame body for the optic-lens perforating through. The perforating hole provides a hole center axis deviating from the frame center axis, so that the perforating hole can rotate to different positions to be adapted for the optic-lenses with different assembling positions perforating through when the frame body rotates around the frame center axis corresponding to the assembling hole.

Abstract: An image pickup apparatus is provided. The image pickup apparatus permitting a conversion lens to be mounted and dismounted, wherein a lens hood is composed of a base portion on the mounting side and a tubular portion on the front side, the base portion and the tubular portion are detachably coupled to each other, and another lens is contained in the inside of the lens hood when the another lens is mounted on the front side of an optical system, whereby even when the conversion lens is being used, the lens hood can be used as it is, and the incident light contracting function of the lens hood can be maintained.

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: A cup for an eyepiece of an optical observation instrument, comprises a peripheral wall which includes an eyepiece-connecting section for connection of the cup to an eyepiece, a transition section which adjoins the eyepiece-connecting section, a light-protecting attachment which, by way of a sectional part of the transition section, is joined to a side of the transition section that is turned away from the eyepiece-connecting section; a sight hole which is laterally defined by the peripheral wall; the peripheral wall being movable into a first, non-folded end position for someone who does not wear spectacles for preclusion of any incidence of stray light upon an eyepiece lens, and into a second, folded end position for spectacle wearers; and into a third stable position of ventilation, located between the first and the second end position, for someone not wearing spectacles.

Abstract: A light shielding structure of a lens barrel including an inner ring and an outer ring, wherein the inner ring includes a through cutout portion, the light shielding structure including an inner flange wall provided with the inner ring; a first annular groove formed on an inner surface of the inner flange wall; a second annular groove formed on an inner peripheral surface of the outer ring; and a light shield ring, wherein the light shield ring includes a cylindrical portion centered about the optical axis, and an outer flange portion which extends radially outwards from a rear end of the cylindrical portion so that the cylindrical portion and the outer flange portion and inserted into the first and second annular grooves, respectively.

Abstract: A lens hood with lens covers that need not be attached to and detached from a lens unit and are easily openable and closable relative to each other. The lens hood includes a hood body attached to the front of a lens to prevent unnecessary light from being incident upon the lens, a pair of lens covers installed inside the hood body to be pivotable about an axis perpendicular to the optical axis of the lens and movable between a closed position where they will cover the lens and an opened position where they will be outside the field of view of the lens, and a cover operating mechanism that operates in conjunction with the sliding of an operator installed slidably to the hood body to pivot the lens covers in opposite directions, respectively, and to pivot the pair of lens covers between the opened and closed positions.

Abstract: An optical filters quick assembly support system or a “Matte Box” as it is known in the film industry, supporting plurality of no-tool, quick-change, snap-on, independently 360°-rotating filter-holder stages, allowing freedom of operation in the horizontal, vertical and rotational planes. A mount base ring having an internal circular coupling slot at one face for attaching the desired number of filter-holder stages serves as an initial receiving unit. The same mount ring having two slidable and lockable brackets for connecting a sunshade in an adjustable manner, assembled to it. Filter-holder stages consisting of a ring having the same internal circular coupling slot as the mount base ring at one face and one stationary and one spring-loaded filter-holder guide attached to the opposite face. The filter-holder guides having a corresponding to the coupling slot semi-circular sliding ribs for coupling with the mount base ring or any additional filter-holder stage.

Abstract: Exposure light can pass through a partition wall parallel plate via the opening of the second wall and the opening of the first wall, the first opposing surface of the first wall and the second opposing surface of the second wall respectively oppose one surface and the other surface of the partition wall parallel plate via the first clearance and the second clearance, and the partition wall parallel plate is supported at least at three points such that the third opposing surface of the third wall opposes the entire peripheral surface of the partition wall parallel plate. Further, the third clearance is connected to an exhaust route. Specifically, unnecessary stress is not applied to the partition wall parallel plate, and even if gas tries to flow from space on one side of the partition wall parallel plate into the other space, mixing of gases between two spaces can be effectively suppressed because gas in the third clearance is forcibly exhausted outside via the exhaust route.

Abstract: An arrangement is specified for rotatable adjustment of a cap (2) on an eyepiece housing (1), with the cap (2) having grooves (3) on its inner face, which rise in the axial direction and have defined latching depressions (4) in the sliding bases (11) of the grooves (3), and pins (5) which point radially outwards being arranged on the eyepiece housing (1) and engaging with sliding bases (11) of the grooves (3) and resting on the sliding bases (11) of the grooves (3) and in the latching depressions (4) in a prestressed manner. The arrangement comprises the pins (5) being mounted in a sprung manner in the eyepiece housing (1).

Abstract: Vision enhancing apparatus includes a lens and tethered lens cap which protects the lens when the apparatus is not in use. The apparatus also includes a protrusion having a shape complementary to the lens cap for retaining the latter when the apparatus is in use.

Abstract: A water-resistant scope shade is provided having a sun shielding barrel which includes a barrel grasping collar, a barrel body, and a pivotal hook affixed to the barrel. The sun shielding barrel is removably attached to a sighting end of a telescopic sight of a rifle or other optical device. The pivotal hood includes lenses of a circular configuration to be fittingly received on a collar of the pivoting hood. A second embodiment has both a pivoting hood housing the lens and a pivoted cover for protecting the lens in the installed position.

Abstract: A pair of binoculars, a telescope or the like, comprising a protective lens cap articulated to the front of the lens, is characterized in that a pivot joint arrangement is formed between an edge of the lens and the protective lens cap, in use having a substantially horizontal pivot axis and a substantially vertical pivot axis.

Abstract: An arrangement for rotatable adjustment of a cap on an eyepiece housing with a stationary pin pointing radially outward from the eyepiece housing and a groove which is assigned to the pin, arranged on the inner side of the cap and rises in the axial direction, is characterized in that, in a plane at right angles to the longitudinal axis of the eyepiece housing, three pins are arranged on the latter, the heads of which pins have at least approximately the same spacing from the longitudinal axis, and in that the sliding bottom of the groove assigned to each pin has a smaller spacing in relation thereto, so that the cap bears against the pins under prestress.

Abstract: A ring-shaped flare stopper is made of a phosphor bronze plate having a thickness of 0.03 mm by sheet metal stamping. An inner periphery for defining a circular opening is formed in the flare stopper. The inner periphery has the form of the side face of a circular truncated cone. The flare stopper is so installed in a lens barrel that the inner periphery is inclined with respect to an optical axis of a taking lens unit. Since incident light is not reflected by the inner periphery of the flare stopper, the occurrence of ghost and flare is prevented. To prevent the deformation and misalignment of the flare stopper, the flare stopper installed in the lens barrel is attached to a spacer.

Abstract: A light trap includes a light focusing assembly and a light trap assembly. The light focusing assembly includes an access member and an intermediate member. The access member has a frustoconical shape and includes a first end and a second end having a larger cross-sectional area than the first end. The intermediate member defines an internal cavity therethrough. The intermediate member also includes a first end and a second end, with the first end being in optical communication with the second end of the access member. The light trap assembly includes a housing and a conical member. The housing defines an internal cavity that opens through one end thereof. The housing is positioned relative to the intermediate member proximate the second end of the intermediate member. The conical member has a base and an opposing apex, and is disposed within the internal cavity defined by the housing.

Abstract: A protective, open-ended, sleeve, FIG. #2, which is easily slipped over the ends of a rifle telescopic sight, hereafter called a ‘boot’. The portion of the boot which slips over the end of the telescope, (4), fits snugly enough for a firm fit. Where the boot extends past the end of the telescope tube it tapers, (5), to a smaller diameter, providing a barrier to rain drops which might reach the lens of the telescope, thus ensuring a constant clear sight picture through the telescope for the hunter. This boot will ensure that there will be no delay in taking that split-second shot at game that may not provide another shot otherwise.

Abstract: The invention provides a computer monitor bezel including a bezel mount, and opaque planar member, and a bezel face. The bezel mount includes a frame and a mounting formation. The frame defines a frame viewing opening entirely surrounded by the frame. The mounting formation is located on the frame to mount the frame to a sub-monitor in a position wherein a screen of the sub-monitor is viewable through the frame viewing opening. The opaque planar member is located over the bezel mount. The bezel face includes a translucent planar member and an attachment component. The translucent planar member is located over the opaque planar member. The attachment component has a first end secured to the translucent planar member, extends past a plane of the opaque planar member, and has a second, opposing end secured to the frame.

Abstract: An arrangement for rotatable adjustment of a cap on an eyepiece housing with a stationary pin pointing radially outward from the eyepiece housing and a groove which is assigned to the pin, arranged on the inner side of the cap and rises in the axial direction, is characterized in that, in a plane at right angles to the longitudinal axis of the eyepiece housing, three pins are arranged on the latter, the heads of which pins have at least approximately the same spacing from the longitudinal axis, and in that the sliding bottom of the groove assigned to each pin has a smaller spacing in relation thereto, so that the cap bears against the pins under prestress.

Abstract: The invention is a single device comprised of both an eye enhancer cover and a shade collector the two being connected to each other by two or more elastic band fasteners so it can be removably mounted on a sighting telescopic sight and can be easily stored when not in use. The object of the device is to optimize sighting of a target area under adverse lighting conditions with a single device.

Abstract: A water-resistant scope shade is provided having a sun shielding barrel which includes a barrel grasping collar, a barrel body, and a pivotal hook affixed to the barrel. The sun shielding barrel is removably attached to a sighting end of a telescopic sight of a rifle or other optical device. The pivotal hood includes lenses of a circular configuration to be fittingly received on a collar of the pivoting hood. A second embodiment has both a pivoting hood housing the lens and a pivoted cover for protecting the lens in the installed position.

Abstract: Binoculars, one form of telescope, in accordance with the present invention have a lens frame drive responsive to manipulating a focusing ring. Lens frames are driven to advance or withdrawn by means of the lens frame drive. The lens frames are driven to thrust from their positions of collapse to other positions, at which they enable observation, by manipulating the focusing ring. At this time, lens barriers covering the front surfaces of the lens frames are pressed by means of projections, and thus driven from positions at which they block objectives to other positions at which they free the objectives. Withdrawal of the lens barriers and thrusting of the lens frames can be achieved merely by manipulating the focusing ring. Changing the lens barriers from their positions of protection to their positions of withdrawal can be achieved with the simple manipulation.

Abstract: A tubular attachment for a video monitor frame which encloses an LCD screen by insertion of the frame through an entry opening in the attachment to be located within an internal chamber of the attachment. The function of the attachment is to reduce glare when observing an LCD screen and also to provide an element of privacy and decrease sun damage to the LCD screen. The attachment is to be constructed of a rubberized fabric sheet material which not only permits the attachment to be stretched to accommodate to different sizes of video monitor frames but also permits the attachment to be collapsed when not in use facilitating its stowage.

Abstract: A water-resistant scope shade is provided having a sun shielding barrel which includes a barrel grasping collar and a barrel body, and a pivotal hood affixed to the barrel. The sun shielding barrel is removably attached to a sighting end of a telescopic sight of a rifle.pivotal hood includes lens of a circular configuration to be fittingly received on a collar of the pivoting hood.

Abstract: Binoculars includes a pair of lens barrel bodies and a pair of eyepiece portions. At least one of the pair of eyepiece portions is provided with an eyepiece frame fixed on one of the lens barrel bodies, a plurality of eyepiece lenses, a diopter adjusting portion that moves all of the plurality of eyepiece lenses by the same movement amount in an optical axis direction, and a via-rotation-drawable type eye cup portion. The diopter adjusting portion includes a cam pin fixed relative to the eyepiece frame and a diopter ring that is guided by the cam pin in the optical axis direction by rotating of the diopter ring around an optical axis to move all of the plurality of eyepiece lenses in the optical axis direction.

Abstract: An optical apparatus according to the present invention has an eyepiece side body internally equipped with a diopter adjusting ring for diopter adjustment of an eyepiece, a barrier, an eyecup ring including a driving pin for opening and closing the barrier and a cam groove for advancing and retreating an eyecup fitted in an eyecup ring. When the eyecup ring is rotated counterclockwise, the barrier is rotated up to an opening position, and when further rotated, the eyecup is twisted up. When operated in the reverse direction, the eyecup is drawn in and the barrier is rotated to a closing position. It is possible to easily accomplish the moving and opening/closing operations for protecting a hood member (eyecup) and an optical system (eyepiece), and the structures thereof are simple.

Abstract: In an eyepiece cup for binoculars, which fits substantially tightly in particular around a user's eyes, provision is made for air admission holes.

Abstract: An eyecup assembly for a submarine periscope blinder assembly includes an annularly-shaped ring having a multiplicity of holes, which are unthreaded, extending therethrough and adapted to receive screws for securing the eyecup assembly to a like multiplicity of holes which are threaded and arranged in a circular pattern around an eyepiece opening in the blinder assembly, the ring defining a central viewing opening. An eyecup lateral shell circumscribes the eyecup chamber and is fixed to the ring and configured to conform generally to an eye area of a viewer's head, and to be interchangeably mounted to the threaded holes to receive either the viewer's left or right eyes by selectively indexing the holes in the ring 180° apart relative to the threaded blinder assembly holes.

Abstract: A lens barrel assembly includes a lens barrel and a lens hood detachably mounted on the lens barrel. A lens barrel includes a mounting threaded portion and three guide rails at three circularly equally spaced positions around the lens barrel. Each guide rail is provided with a forward latch and a rearward latch. The lens hood is constructed of an elastically deformable member, and has a notch to be engaged with the rail. The lens hood is in sliding engagement with the outer circumference of the lens barrel, and is movable between a retracted position and a photographing position. At each position, the lens hood is locked by the respective latch. The lens hood is easily shifted to the photographing position or to the retracted position along the lens barrel, and is also easily attached to and detached from a camera.

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: In an image reading device in which an original is illuminated by a light source, and a reflected beam from the original is imaged on a sensor through a rod lens array, a light-shielding member is arranged between the beam exit surface of the light source and the incident surface of the rod lens array to prevent the beam from the light source from being directly incident on the rod lens array to cause a flare. An image reading device and information processing apparatus in which the image quality is rarely degraded by the flare beam are provided.

Abstract: An optical shield for preventing stray light from reaching the focal plane of an optical device includes a tubular housing defining an aperture at one end for admitting light to pass through the housing to the focal plane, and a plurality of annular conical baffles attached to the housing wall and axially spaced along the housing between the aperture and the focal plane. In one embodiment, the housing wall is conical and the baffles are all aimed at a location on the housing wall which is between the aperture and a forwardmost one of the baffles adjacent the aperture, such that the rearward-facing surfaces of the baffles are shielded from direct and reflected light. The baffles are spaced sufficiently closely and are long enough that the baffles shield the focal plane from those portions of the housing wall that are directly illuminable by light passing through the aperture.

Abstract: A lens barrel is provided with: first and second lens frames which are adapted to be able to make a relative displacement therebetween and are adapted so that an inner peripheral portion of one of the first and second lens frames overlaps with an outer peripheral portion of the other lens frame in a used state; a light shielding portion, which is provided at one end portion of the first lens frame, for blocking light which is incident from the end portion in the used state; and a pressure-contact light shield member that is provided at a place which is nearer to an other end portion of the first lens frame than the light shielding portion provided at the one end portion thereof and that is adapted to be elastically deformed by being pressure-contacted to the outer peripheral portion of the second lens frame, thereby blocking light transmitted by the light shielding portion provided at the one end portion of the first lens frame.

Abstract: A portable viewing tunnel for transparencies, medical radiographs, mammograms and other trans-illuminated materials is presented. Its proper use provokes human physiologic darkness adaptation primarily by means of an elastic neoprene rubber laminate cylinder with a malleable distal aperture which can be manually shaped to fit the form of the dark or detailed areas of interest being viewed. This characteristic prevents light which is emanating from bright sources within or next to the trans-illuminated image from reaching the eyes and spoiling physiologic darkness adaptation. Additional steps to exclude stray light include a soft, form fitting goggle on the proximal end to contact the face around the eyes forming a light tight junction between viewing tunnel and the eyes. An intermediate lens board is included for easy changes in binocular magnifier lenses. This device replaces most of the need for bright lighting or masking for viewing dark areas on transparencies and other trans-illuminated materials.