Non-distorting mirrors are disclosed that are each curved in at least one plane and positioned relative to an observer in accordance with a mathematical relation by which the observer is presented with a virtual image of a selected field of view of the surroundings, the virtual image having a specified angular magnification or demagnification without angular distortion in the aforementioned plane. Such a mirror may be designed to have a value of angular demagnification for which a wide field of ...

A blackout blind is movably mounted within a periscope of an armor vehicle for covering the eyepiece viewing opening when not in use to prevent interior light from being emitted through the periscope and revealing the location of the vehicle. A transparent block of plastic is mounted within a protective housing which extends through an opening in the vehicle armor. A viewing opening is formed in the housing portion located within the vehicle for observing an exterior field of view. A sheet metal...

An electromagnetically controllable pivoting device for pivoting a reflecting surface of a pivoting mirror about pivotal axes parallel to said surface with the aid of electrical control signals, more particularly intended for a video disc player in which a light beam is produced by means of a light source, which beam is aimed at an information track of a rotating optically readable video disc by means of the reflecting surface of the pivoting mirror. The mirror is supported by a bellows body of ...

Optical communication, switching and control apparatus and systems are disclosed, including modular electro-optical logic circuits, methods of construction and assembly of such modules and applications thereof. Optical transmission lines are interconnected by convenient connectors, and are assembled with switches, and optical signals, including visible light radiation, ultra-violet radiation and infra-red radiation are transmitted over the lines for carrying data and/or central signals. The opti...

First and second triangular prisms are bonded together at their bases with a semi-transparent reflecting material therebetween. A light beam from a laser is incident on the upstream face of the first prism and refracted thereby so as to be incident on the semi-transparent reflecting material at a predetermined angle to the longitudinal axis thereof. One component of the beam is reflected from the semi-transparent material and refracted by the first prism so as to emerge therefrom parallel to the...

Optical scanning apparatus for scanning and sensing information contained on a label-bearing article includes a light source, a rotatable member having a reflective surface, optical means for directing light from the source to the reflective surface and optical means for directing light reflected from the reflective surface to form a scanning pattern on a predetermined plane; the scanning pattern being comprised of a plurality of segments together forming at least one pair of overlapping X-shape...

A binocular optical apparatus provided with an objective and eyepiece lens system and using a mirror system for deflecting a light beam from the illuminated object to the eyepieces. The interocular separation, or distance between the eyepieces is adjustable by way of making the optical axis of at least one eyepiece swivelable relative to the optical axis of the other eyepiece at an angle determining the interocular distance of the eyepieces within an angle conforming to the range of natural eye ...

A rear view mirror assembly adapted for attachment to the outside of a motor vehicle is disclosed. The assembly comprises a fixed arm which is adapted to be attached to the motor vehicle, a disc rotatably mounted on said arm about a general horizontally axis and a pair of mirrors adjustably mounted on said disc by ball joint assemblies. By adjustment of the disc relative to the arm a desired position of the two mirrors can be obtained relative to the motor vehicle and then the mirrors themselves...

A convex mirror has a frosted non-reflective elongated and horizontal line, approximately midway of the mirror and of a width less than the thickness of the mirror, and a light source is disposed adjacent the reflective surface with a colored filter positioned between the light source and the frosted line whereby a predetermined safe distance is indicated for changing lanes into a position in front of the immediately passed vehicle. In another mirror, safe turning distances are indicated by pred...

A reflective mirror system for controlling the supply beam of a laser is provided. The system includes a first mirror having the surface of a partial section of the surface of a paraboloid of revolution and mounted in a housing relative to a collimated beam such as produced by a laser, so as to reflect the beam from the direction of travel on to a second mirror. From the second mirror the beam is reflected through an opening in the first mirror and converged to a point of focus for doing useful ...