A supported thin metal hologram is formed and mounted on a substrate using an adhesive. In a preferred aspect, the hologram is covered with a transparent resin which preferably is identical to the adhesive.

A stereo vision optical instrument having eyepieces which are rotatably mounted to the instrument by way of pivot plates includes apparatus coupled between the pivot plates to prevent binding of the eyepieces as they are rotated.

An image scanning apparatus for use on a laser electrophotographic printer provides improved imaging in both the scan and process direction in a printer using a multiple spot printhead.

A zoom lens system capable of wide-angle viewing for a high zoom ratio has four lens groupss, all of which change the focal length of the overall system while the position of the image plane is held constant. The second lens group comprises a negative lens element having a concave surface of large curvature on the image side, a biconcave negative lens element that is cemented to a positive lens element to provide a cemented surface that has a large curvature and which is convex toward the object…

Compact airspaced four element photographic objectives are shown with an overall length less than 1/8 the focal length. Chromatic and spherical aberrations, coma, astigmatism, field curvature and distortion are corrected. The ratio of the minimum Abbe .upsilon. value of the first and fourth elements to the maximum Abbe .upsilon. value of the second and third elements (i.e., Baker’s Ratio) is less than 1.2. The Petzval sum does not exceed 0.225. Focusing is accomplished by a movable first element…

A correcting lens for use in the formation of fluorescent dots on a color picture tube, which has its effective surface divided into a plurality of sections each of which consists of a flat or curved surface as designated and at least one of which has borderlines of discontinuity in at least two directions.

A system including an optical beam wave guide for simultaneous propagation of a plurality of independent spatially coherent optical beams with minimal mutual interference; the optical beam wave guide includes either (1) a series of spaced lenses or other beam iterating means, one at each of a plurality of distinct positions for beam iteration (reconstitution) along the length of the guide for transmitting simultaneously all of the optical beams, (2) an array of separate optical elements at each …

A three-member microscope objective having a numerical aperture of substantially 0.07 and a magnification of substantially 2.5 .times..

A zoom ring is provided for a zoom lens, the ring being made of at least two members; a cylindrical member including a rotational limit stop and provided with cam slots, and a curved member or plate formed with matching cam slots. The cam slots in both members register with each other when the curved plate is positioned on the cylindrical member by means of pin connections, the cam slots in the cylindrical member being relieved while the plate cam slots are accurately machined. In zoom lens syst…

This invention relates to spectral zonal photography in which spectral zones of a scene are stored with unique respective carrier modulations on a colorblind photostorage medium such as a black-and-white panchromatic film from which the scene can be reconstructed in color by Fourier transform techniques with spatial and spectral filtering, and in particular to methods and means to effect such storage without the intervention of a plurality of separate individual images of the scene. Each of seve…