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| Number | Title | Issue Date |
| 5991033 | Interferometer with air turbulence compensation An improved interferometer measuring system that corrects for errors in the determination of the position of a measurement reflector along a measurement path due to the presence of an atmosphere (e.g. atmospheric turbulence) along the path is disclosed. T... | 11/23/1999 |
| 5543914 | Apparatus and methods employing harmonic analysis for measuring the difference in phase between two coherent beams An improved interferometric measuring system that includes a system for measuring a phase difference between two coherent beams oscillating at substantially the same frequency, and including a phase modulator disposed into optical communication with one o... | 08/06/1996 |
| 5537209 | An interferometric measuring system having temperature compensation and improved optical configurations An improved interferometric measuring system wherein the system projects a first beam of light at a first measurement wavelength along a reference path to a reference reflector and a second beam of light at a second measurement wavelength along a measurem... | 07/16/1996 |
| 5404222 | Interferametric measuring system with air turbulence compensation An improved interferometric measuring system wherein the system projects a first beam of light at a first measurement wavelength along a reference path to a reference reflector and a second beam of light at a second measurement wavelength along a measurem... | 04/04/1995 |
| 5319629 | Content addressable optical data storage system A multidimensional optical storage medium is provided for storing a plurality of holographic images representative of data. An interrogation network generates a search argument including a target data field to be simultaneously searched for over at least ... | 06/07/1994 |
| 4998236 | Apparatus for high density holographic optical data storage Methods and apparatus for writing and reading data provide storage in a volume of memory material consisting of inhomogenously broadened absorption centers such that a beam of electromagnetic radiation controlled to be independently steered and simultaneo... | 03/05/1991 |
| 4897843 | Frequency-agile laser systems A high-speed broadband tunable laser system is disclosed. In one illustrated embodiment, a microprocessor-controlled synchronous tunable laser system is disclosed having multiple tuning elements. The tuning elements can be individual birefringent crystals... | 01/30/1990 |
| 4513441 | Image comparison system Image comparison is accomplished by forming a composite image composed of a reference image and a test image. A two-dimensional image spectrum is generated from the composite image and then is whitened by setting the magnitude of every point of the two-di... | 04/23/1985 |
