Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1995-06-07
1999-02-09
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
2502012, 348135, 364458, G02B 704, H04N 718, G04C 2100
Patent
active
058701796
ABSTRACT:
Range or distance to points is estimated within a scene, while simultaneously imaging the scene. The range to various points within the scene is estimated by imaging at least a first color of light from the scene through an optical mask and a lens onto a CCD, and then digitally processing the first color light intensity values stored in the CCD. At least a second color of light passes through the mask essentially unchanged and is separated from the first color of light before reaching the CCD and used for imaging the scene. The optical mask is designed such that the optical system transformation matrix for the first color of light is rank deficient for a particular set of object ranges. In this way, linear functions can be found to annihilate given sampled image data at a plurality of ranges, independent of the intensity of the light received from the object. A statistical detector is used to determine the closest associated range to the actual range of the point within the scene.
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Article "Conoscopic Holography Basics and Physical Basis" by G. Sirat, J. OPT, SOC. Am.A, vol. 9, No. 1 Jan. 1992.
Cathey, Jr. Wade Thomas
Dowski, Jr. Edward Raymond
Buczinski Stephen C.
Hancock E. C.
Sirr F. A.
The Regents of the University of Colorado
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