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| Number | Title | Issue Date |
| 4471222 | Bifunctional optical sensing system A bifunctional sensor is disclosed for an optical seeking system which utzes a single focussing lens arrangement for focussing light of two distinct wavelength ranges. A first detector for detecting light of the first wavelength range is provided nearest... | 09/11/1984 |
| 4398786 | Collimation lens system An eyepiece or collimation lens system (22) is formed by three optically-powered lens elements (A, B, C) aligned on a common optical axis (23) and arranged to accept radiation in the infrared wavelength region from a real image (I) and provide a bundle of... | 08/16/1983 |
| 4381149 | Range responsive apparatus The invention provides a range responsive apparatus primarily intended for operation at infra-red. A detector is arranged to receive electro-magnetic energy simultaneously from different spaced portions of a field of view which is caused to rotate so as t... | 04/26/1983 |
| 4335959 | Optical element for photographic radiometer A plastic optical element having especially selected spectral transmission characteristics is structured to collect and direct radiation from a photographic scene onto the surface of a photodetector which operates to generate an output signal that can be ... | 06/22/1982 |
| 4328318 | Glasses containing fluorine, their preparation and their application Glasses containing fluorine. These glasses are characterized by the fact that they contain at least 25% in moles, approximately, of a fluoride or a mixture of fluorides MX(X1)2, in which: X and X1 each represent a fluorine atom... | 05/04/1982 |
| 4322124 | Low cost wide field of view infrared sensor A wide field of view infrared sensor is disclosed. A field of view in excess of 180 degrees is achieved by the use of a single element, negative miniscus lens. There is provided a flat PbS detector element, and the lens has an anti-reflection coating of S... | 03/30/1982 |
| 4321594 | Passive infrared detector A passive infrared intrusion detection system is provided in which one or more Fresnel lenses are employed to focus received infrared energy onto a detector element which provides an electrical output signal indicative of the level of received radiation. ... | 03/23/1982 |
| 4181626 | Method of preparing tungsten hexacarbonyl containing polymers and polymers prepared thereby Disclosed are light absorbing solutions of tungsten hexacarbonyl in olefinically unsaturated carboxylic acids and light absorbing polymers prepared from allyl carbonate, olefinically unsaturated acid monomers, and tungsten hexacarbonyl. Also disclosed is ... | 01/01/1980 |
| 4087688 | Infrared radiation-burglary detector An infrared radiation-burglary detector comprising an optical system for focusing the radiation upon a radiation receiver. One or more internally reflecting prism surfaces enclose the axis of the optical system and are arranged substantially parallel to s... | 05/02/1978 |
| 4085910 | Dual mode optical seeker for guided missile control An optical assembly is mounted in the nose of a missile, this assembly including an infra-red sensor for sensing the orientation of the missile relative to an infra-red illuminated target, and a visible sensor such as a vidicon for determining the orienta... | 04/25/1978 |
| 4062867 | Metal 1,2 dithiolene thiophene derivatives Novel compounds of the formula: ##STR1## where: Me is nickel, platinum or palladium and each R is the same radical selected from the group consisting of ##STR2##... | 12/13/1977 |
| 4038547 | Tracking and sighting instrument Tracking and sighting apparatus for use in a missile guiding system. The apparatus receives visible light from a target, along with infrared light from the missile itself. Initially a beam splitter separates these different types of light. The beam splitt... | 07/26/1977 |
| 4027160 | Infrared detection system with parallel strip reticle means Optical detectors are arranged along the focal length of a spherical mirr Signals passed by a lens and reflected by the mirror impinge on the detectors as the system scans the horizon. A reticle means is placed between the mirror and the detector to caus... | 05/31/1977 |
| 4009928 | Three element varifocal lens systems A three element varifocal lens system in which the front and back lens elements are stationary and the inner lens is shiftable from the telephoto to the wide angle position. The front lens is negative while the inner and back lenses are positive. The lens... | 03/01/1977 |
| 3992078 | Lens structure An optical objective for the infra-red wave band, comprising front and rear simple positive lens elements each made of Germanium, said elements being axially spaced by a distance S lying between 0.8F and 1.2F, the rear surfaces of said elements being plan... | 11/16/1976 |
