Abstract: The invention provides an optical device for displaying one or more images on a picture tube so as to be viewable from the anterior end of the device. The optical device can be used to display abstract or non-abstract subject matter. The optical device includes a picture tube having one or more images to be displayed by the device and an imaging assembly housed in a cavity formed by lateral sides of the picture tube, the imaging assembly having a reflecting surface that reflects the one or more images on the picture tube so as to be viewable from the anterior end of the device.

Abstract: A single-mode, etched facet distributed Bragg reflector laser includes an AlGaInAs/InP laser cavity, a front mirror stack with multiple Fabry-Perot elements, a rear DBR reflector, and a rear detector. The front mirror stack elements and the rear reflector elements include input and output etched facets, and the laser cavity is an etched ridge cavity, all formed from an epitaxial wafer by a two-step lithography and CAIBE process.

Abstract: An operation microscope includes a microscope body having an illumination optical system which illuminates a subject, a lens barrel, and a main observation optical system which observes the subject, an assistant's microscope unit attached to the microscope body, and a guide rail which is disposed in the lens barrel of the microscope body, and extends in a circumferential direction about a center of an optical axis of an objective lens of the microscope body. The assistant's microscope unit is disposed in the guide rail to be movable between a usage position and a non-usage position in a circumferential direction of the lens barrel.

Abstract: A telescope having a focus display includes a tube assembly, a sensor and a focus display. The tube assembly has a first tube and a second tube connected within the first tube. The first tube has an opening. The sensor is provided on the second tube. The focus display is provided in the opening of the first tube. The focus display is provided with a screen, a processing unit and an electromagnetic sensing unit. The electromagnetic sensing unit, the processing unit and the screen are electrically connected with each other. When the first tube is telescopically moved with respect to the second tube, the electromagnetic sensing unit receives and senses the change in the electromagnetic field of the sensor. The processing unit then calculates the displacement and displays the data on the screen, so that the user can focus the telescope to obtain the clearest image.

Abstract: The lens apparatus which includes a lens system, a cam barrel including a cam surface, and a moving barrel provided with a cam follower in contact with the cam surface and configured to be moved in a direction of an optical axis of the lens system by rotation of the cam barrel around the optical axis. The cam surface is parallel to a direction orthogonal to the optical axis. The cam barrel includes a tapered surface inclining with respect to the direction orthogonal to the optical axis. The moving barrel is provided with a tapered follower in contact with the tapered surface and a pressing mechanism configured to bias the tapered follower in the direction orthogonal to the optical axis so as to press the tapered follower against the tapered surface to thereby press the cam follower against the cam surface in the direction of the optical axis.

Abstract: A tube (10) for an optical observation device, in particular for a microscope, is described, with a viewing level that is linearly variable in length and/or height, wherein the tube (10) has an optical light path, in which at least two optical elements (23, 34) are disposed, for example, deflecting elements. The tube can be designed, for example, as a swing-in tube, with a base part (20), wherein a deflecting element (23) is disposed in base part (20) so that it can rotate around an axis of rotation (22), and with an eyepiece support (30) that can swing in relative to base part (20), wherein a deflecting element (34) is disposed in eyepiece support (30) so that it can rotate around an axis of rotation (33).

Abstract: The present application relates to an eyepiece for use with a viewing device. The eyepiece is configured to change the distance between a first edge of the eyepiece and a lens near a second edge of the eyepiece. The eyepiece includes a first element having a pin extending therefrom and a rotational axis having a first axial direction and a second axial direction. The eyepiece further includes a second element having a groove, the second element sharing the rotational axis and configured to rotate about the rotational axis relative to the first element. The groove comprises a first pin movement section and a second pin movement section. The groove further comprises a pin stopping section, the pin stopping section located between the first pin movement section and the second pin movement section. The pin stopping section is configured to prevent the second element from rotating relative to the first element.

Abstract: An improved aiming tube pivot assembly for use in a sighting and/or aiming apparatus which comprises an aiming tube axially mounted within an outer tube (or housing). A support ring supports the aiming tube within the outer tube in a gimbal-like arrangement by means of ball bearings and set screws. The ball bearings are secured intermediate the aiming tube and the support ring via apertures in the outer tube. The set screws are threadedly mounted in the support ring and engage the outer surface of the outer tube. A movable cover tube can be mounted on the outer tube and substantially encloses the end of the outer tube and the support ring.

Abstract: To provide a camera that is suited to shoot both a demagnified image and a magnified image. The camera includes a housing body 11 containing a CCD 15, and a lens barrel 12. An abutted member 20 having an objective lens 40 therein is engaged with the lens barrel 12 and a rotatable manually-controlled member 30 is fitted around that lens barrel. The abutted member 20 moves back and forth in the direction of an optical axis K in response to the rotation of the manually-controlled member 30. A user moves the objective lens 40 back and forth by moving the abutted member 20 back and forth to shoot either a demagnified image or a magnified image. A demagnified image is photographed with the abutted member 20 contained in the lens barrel 12. A magnified image is photographed with the abutted member 20 projected from the lens barrel 12. An end of the abutted member 20 is positioned so that the focal point of the objective lens 40 falls on the center thereof.

Abstract: A rear-project video assembly with a foldable reflector includes a housing and a screen mounted in a first side of the housing. A reflector has one side pivotally connected to a second side of the housing for reflecting image to the screen. An overhead projector is mounted on a bottom of the housing for projecting image to the reflector and a drive device is mounted between the screen and the reflector for expanding the reflector when using the reflector and backward moving the reflector after using the reflector to reduce the volume of the rear-project video assembly. A bellows is mounted between the peripheries of the second side of the housing and the reflector to prevent the foreign matter and the light ray from entering the housing.

Abstract: A laser projection apparatus includes a source for generating a laser beam, various optical elements for manipulating the laser beam in order to obtain a predetermined image projection of laser light, wherein the optical elements each have at least one optical axis, and connecting elements which connect the optical elements such that the optical axes of adjacent optical elements extend coaxially, which various optical elements are accommodated in separate modules, wherein the connecting elements are formed by couplings mutually coupling the modules so that direct mutual coupling of the modules with different optical elements ensures that the optical axes thereof extend coaxially and that the whole optical system is thus aligned.

Abstract: Telescopes have many accessories including astrophotography devices. A finely threaded accessory ring of conventional diameter is provided on these telescopes with the accessories being screwed thereinto with the constant danger of cross-threading. The present invention is threaded into the accessory ring of the telescope and on to the mating threads of the accessories. Through the use of the adapter of the present invention, the male adapter includes an outwardly projecting locking pin and the female adapter includes a mating, generally L-shaped locking slot to allow slide-on and twist locking and twist and slide-off unlocking. This can be accomplished in one to two seconds versus ten to twelve seconds to install and seven to eight seconds to remove accessories using the conventional thread-on, thread-off method.

Abstract: A screen assembly that includes a screen material which is bonded to a thin metal substrate. The substrate is typically a solid 1/16 inch thick sheet of aluminum that is both light weight and strong. The bonded screen/substrate subassembly is mounted to an flip panel frame which is pivotally connected to an outer frame. To increase the rigidity of the substrate, the edges of the screen subassembly are located within a channel of the flip panel frame and held in place by a flexible foam cord that is pressed between the subassembly and the frame. The outer frame is pivotally connected to a stationary frame that is mounted to a structure, such as the wall of an aircraft passenger compartment. To display images on the screen, the outer frame is rotated away from the wall and the flip panel frame is flipped around to expose the screen to the passenger compartment.

Abstract: A mounting device for a laser light source comprising fixed and mobile platforms which are generally cylindrical in shape, the fixed platform being slideably receivable within an optical tube. Each of the platforms has both one closed and one open end, the closed end defining a centrally-located socket for receiving a spherical bearing and at least three holes spaced equidistant from each other. The holes in the fixed platform are alignable with those in the mobile platform. In assembled relation, the spherical bearing is juxtaposed between the two platforms and held in place by three clamping screws. The shank of each of these clamping screws extends through one of the holes in the fixed platform, past the spherical bearing, and threadedly engages a hole in the mobile platform. Adjustment of the boresight, or alignment with a target, of the laser beam is accomplished by tilting the mobile platform so that its longitudinal axis is disposed at a slight angle to the longitudinal axis of the fixed platform.

Abstract: A compact self-contained fail-safe motorized mirror assembly is provided for selective attachment to the end of a borescope insertion tube, attachment is through three self-locking standoff pins threaded on each end for engagement in the mirror assembly housing and the head connector of the insertion tube. One end of each pin and its socket is right-hand threaded and the other is left-hand threaded. A simplified bayonet style battery housing and motor "on/off" switch are provided at the other end of the housing to complete the assembly so that actuation of the motor can only be accomplished by deliberate rotation of the battery housing end and it cannot be accidentally disengaged except by a compound reverse motion of the end cap.