Abstract: A line light source includes point light source and a light distribution assembly for transporting light from the point source. A fluorescent colorant is included in the light distribution assembly.

Abstract: The present invention provides a pole light for directing or delivering light in a desired pattern to a surface proximate to the pole light. The present invention also provides a method for lighting a plurality of desired regions on a surface in a precise and predetermined pattern useful, for example, as a traffic management and guidance system.

Abstract: A conspicuity enhancer includes a case defining an optical cavity having an output optical window. The conspicuity enhancer also includes first and second linear light sources forming a V. Each linear light source has a light emitting device that inserts light into one end of the light source. The other end of each light source is attached to the case such that each linear light source is in optical communication with the optical cavity.

Abstract: An optical device having a transparent body and including two prism surfaces formed thereon. The composite structure exhibits two axis stability in that the angular relationship between the input beam and the output beam remains fixed for slight movement of the device about two orthogonal axes.

Abstract: A line light source has a light-emitting element that emits light into an insertion conduit. A light absorber absorbs light that makes greater than a predetermined angle with the axis of the light conduit.

Abstract: A reflective overhead projector is provided with two lamps for the purpose of allowing change from one to the other of the lamps in the event of expiration of the lamp in use. The lamps are arranged to face the center of a circle at which is positioned a rotatable planar mirror which may be turned to direct light from a desired one of the two lamps. An electrical switch senses the position of the mirror and directs electrical power to the appropriate lamp.

Abstract: A light source substantially longer than its diameter exhibits two different optical characteristics, such as two different colors, depending upon the direction along the long axis from which it is viewed. The light source comprises a light conduit employing total internal reflection and two illumination sources directing light into the light conduit from opposite ends.

Abstract: The bedstead storage box may be adapted as a bedstead for any regular-size bed, including king-size. It includes a shallow box to support the bed off the floor, a lid to carry a bed assembly including the springs, mattress and bedding, hinges to position the lid on the box and to serve as fulcrum when the lid is raised, gas springs disposed between the lid and box to counterbalance the weight of the load when opening the box, and a lock to secure the box in the closed position. If the bedstead storage box is to be situated with the hinged side adjacent to a wall, the use of an elevated hinge permits the bed to stand closely adjacent to that wall without interference when raising the lid.

Abstract: The invention provides a reflective sheeting material having a structured reflective surface having a linear ray of isosceles prism reflecting elements, each element including a pair of reflective surfaces at an angle of about 120.degree. therebetween. The invention also provides a reflective sheeting material having a structured reflective surface comprising an array of reflecting elements, each comprising a polyhedron having three paralellogram faces. The invention also provides an apparatus such as a light pole for transporting light and reflecting the light in a broad, uniform pattern. The apparatus comprises (a) a columnar light conduit, for transporting light therealong, the conduit having a proximate end and a distal end; (b) a light source provided at the proximate end of the light conduit,and (c) a light distributing reflective member, such as the reflective sheeting material described above, comprising a multiplicity of repeating reflecting elements.

Abstract: A high aspect ratio light fixture has an optical window with a light extraction film therein. The light extraction film has a plurality of linear prisms facing the interior of the light fixture. In one embodiment of the invention the prisms are triangular in shape while in another they are four sided.

Abstract: A light fixture providing normalized output. An undirected light source is located in an optical cavity having an optical window. A film with a smooth surface and a structured surface is placed in the optical window with the smooth surface facing the interior of the optical cavity. The structured surface has a plurality of triangular prisms thereon.

Abstract: An overhead projector includes a projection head which contains a pivoting mirror and a pivoting projection lens interconnected by a linkage. Rotation of the mirror causes rotation and translation of the projection lens and automatically corrects for Scheimpflug distortion and loss of overall focus of the projected image.