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| Number | Title | Issue Date |
| 5238532 | Method and apparatus for removal of subsurface damage in semiconductor materials by plasma etching A high pressure plasma is used in conjunction with a plasma assisted chemical etching material removal tool 10 to rapidly remove subsurface damage from a substrate without mechanically contacting the surface and without introducing new microscopic or atom... | 08/24/1993 |
| 5218785 | Apparatus for finishing a conic surface The apparatus for finishing the conic surface includes a flexible base member and rigid side members, which rigid side members are secured such that the planes thereof intersect in a line that is collinear with the axis of the conic surface to be finished... | 06/15/1993 |
| 5218423 | Method and apparatus for generating a plurality of radiation beams from incident radiation in a multiple wavelength interferometer A beam-slicer (6) for generating a plurality of radiation beams, or pencil beams (7), from incident radiation (3). Each of the beams is directed to a different region of space. The beam-slicer includes a substrate (17) that, for a transmission grating emb... | 06/08/1993 |
| 5198919 | Narrow field or view scanner This invention discloses a narrow field of view scanner (10) incorporating two multi-faceted polygon scanning wheels (12, 16) having a slightly different number of facets (14, 18). Each scanning wheel (12, 16) turns at an angular rate such that a facet (1... | 03/30/1993 |
| 5083034 | Multi-wavelength target system A target system adapted for use in a cassegrain reflective optical collimator system comprises a single target pattern including at least one visible target, at least one near infrared target and at least one far infrared target. This single test target p... | 01/21/1992 |
| 5072188 | Apparatus for measuring the conductivity of paint spray using an electromagnetic wave An apparatus and method for measuring the conductivity of a fluid. The apparatus 10 provides both a contact and non-contact monitoring of fluid conductivity by measuring the A.C. dielectric properties of the fluid. The apparatus 10 transmits an electromag... | 12/10/1991 |
| 5041726 | Infrared holographic defect detector An infrared holographic defect detector (10) comprises a far infrared pulsed coherent source (14) of infrared radiation which provides infrared radiation. The radiation is directed at a generally non-reflective surface (12), for example, a surface of an a... | 08/20/1991 |
| 5041735 | Miniature infrared test target A miniature infrared test target that comprises a heated four-bar test target operated at a high temperature and a physically separated ambient field operated at ambient temperature. A beamsplitter is disposed relative to the test target and the field in ... | 08/20/1991 |
| 5023452 | Method and apparatus for detecting trace contaminents Apparatus and methods for identifying the nature of an unidentified substrate present in trace amounts of known gaseous or liquid media such as air or water include collecting a sample of the substance in the media, filtering and concentrating the sample,... | 06/11/1991 |
| 5009502 | System of holographic optical elements for testing laser range finders A focusing, collimating, and beamsplitting test system for testing laser rangefinders for their beam quality, ranging accuracy, and sight unit alignment. The system includes holographic optical elements in place of conventional mirrors, lenses and beamspl... | 04/23/1991 |
| 5005401 | Noncontact on-line measurement of the viscosity of liquid paint A method and apparatus for non-contact measurement of the viscosity of a liquid such as paint. In accordance with the method and apparatus, the surface of a liquid is perturbed with a standing wave of predetermined wavelength. This perturbation is effecte... | 04/09/1991 |
| 5004914 | Fiber-optic interferometric chemical sensor A fiber-optic interferometric chemical sensor for detecting chemical vapors in the air. The chemical sensor 10 includes a light source 12 which outputs an optical signal to a first beam splitter 14. The first beam splitter 14 splits the optical signal int... | 04/02/1991 |
| 5003186 | Stratospheric Welsbach seeding for reduction of global warming A method is described for reducing atmospheric or global warming resulting from the presence of heat-trapping gases in the atmosphere, i.e., from the greenhouse effect. Such gases are relatively transparent to sunshine, but absorb strongly the long-wavele... | 03/26/1991 |
| 4987582 | X-ray fluorescence imaging of elements A system for detecting the presence of known materials in a body or container. The system incorporates a gamma or X-ray source for irradiating the body with gamma rays to produce X-ray fluorescence of materials contained therein. A directionally discrimin... | 01/22/1991 |
| 4986639 | Eye protection device against broadband high intensity light An eye protection device against broadband high intensity light sources, including a fast response component (picosecond to microsecond) and a slow response component (microsecond and longer). The fast response component consists of two thin semiconductor... | 01/22/1991 |
