Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1977-12-01
1978-08-29
Buczinski, S. C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
356 28, 356156, G01C 308
Patent
active
041100425
ABSTRACT:
Method and apparatus for measuring distance using an optical correlator system containing at least one imaging optic, at least one optically active array, and at least a system of photoelectric detectors associated with the array preferably in the form of an optical grating structure wherein for the purpose of unambiguous distance or range determination by means of optical-geometric steps in the image region and/or in the Fourier space, different beam guidance systems are constructed so that for axial relative motion between object image and array output signals are generated at each photoelectric detector system associated with each beam guidance system, these output signals differing among themselves in frequency and hence (also) in phase. A comparison is made of the output signals and from the comparison the geometric image position of the principal maximum is determined with respect to the geometric positions of the secondary maxima.
REFERENCES:
patent: 3482107 (1969-12-01), Hock
patent: 3508066 (1970-04-01), Agar
patent: 3781110 (1973-12-01), Leitz et al.
Buczinski S. C.
Ernst Leitz Wetzlar GmbH
Wells Gilbert L.
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