Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 4056307 | Anamorphic scanner lens system An improved anamorphic scanner lens system including seven axially aligned cylindrical lens elements, the cylinder axes of the surfaces of the first six elements being disposed at right angles to the direction of the scan line, the axis of the front surfa... | 11/01/1977 |
| 4043641 | Three-lens system providing a variable focal power along one principal meridian Variable focal power along one principal meridian may be obtained by an optical system having two cylinder lenses at either end and their axis of cylinder in a single plane spaced along an optical axis. A moveable cylinder lens with its axis oriented 90°... | 08/23/1977 |
| 4042821 | Remote control light receiver A light receiver for use in a light activated remote control system. A modified cylindrical lens having a wide horizontal acceptance angle and a narrow vertical acceptance angle is directly coupled to a photodetector. The resulting combination provides op... | 08/16/1977 |
| 4009394 | Remote control light transmitter employing a cylindrical lens A light transmitter for use in a light activated T.V. remote control system. A modified cylindrical lens having a wide horizontal dispersion angle and a reduced vertical dispersion angle is directly coupled to a light emitting diode. The resulting combina... | 02/22/1977 |
| 3994583 | Noncontacting method and apparatus for monitoring the speed and travel of a moving article A method and apparatus for monitoring the speed and travel of a moving article (such as a moving sheet of wood veneer) without contacting the article. The apparatus is stationary relative to such an article, and contains an optical imaging system includin... | 11/30/1976 |
| 3991741 | Roof-lens solar collector An array of linear lenses is used as a combination roof-skylight-solar collector. The lenses are oriented at a given latitude to face the most remote of the earth's poles inclined by the local latitude angle. Moving absorbers are used to receive the sunli... | 11/16/1976 |
| 3990785 | Anamorphic zoom lens The present invention relates to an anamorphic zoom lens of rear system intended for photography or projection, which, seen from the object, consists of an afocal zoom part, an afocal anamorphic lens system and an image forming lens system. The above ment... | 11/09/1976 |
| 3977904 | Semi-conductor battery The battery is of the type including a plurality of laminar semi-conductor bodies arranged on a dielectric support in parallel relation to each other and each comprising respectively layers of two different but oppositely conducting semi-conductor materia... | 08/31/1976 |
| 3975095 | Catoptric projection system with a spherical reflecting surface A catoptric projection system in which a projection lens and a spherical convex mirror are arranged with their optical axes intersecting at a point on the mirror at an angle with respect to each astigmatism so that an image is projected from the film plan... | 08/17/1976 |
| 3964824 | Light transmitter An optical system adapted to direct a plane of light in a 360° pattern. This is accomplished by directing a beam of light from a laser onto and normal with a bundle of fiber optics. The beam is reflected and refracted by the optical elements sufficiently... | 06/22/1976 |
| 3947186 | Eye-test lens and method The invention is a test lens made to fit a standard optometrist's trial-lens frame. The lens is a crossed-cylinder astigmator of about &#b1; 5 diopter strength, preferably formed by cementing together a first planoconvex cylinder lens of about 5 diopter s... | 03/30/1976 |
| 3936163 | Vision examination lens system An optical system utilizing a single spherical and two cylindrical lenses. The cylindrical lenses are located along the optical axis of the spherical lens and between the spherical lens aand an optical target. A first of the cylindrical lenses is fixed lo... | 02/03/1976 |
