Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1986-09-09
1989-01-17
Lee, John D.
Optics: measuring and testing
Range or remote distance finding
With photodetection
350320, 350355, 350409, 354163, 354403, 356 4, 356123, G02F 101
Patent
active
047984376
ABSTRACT:
Discrete segments of an analog optical wave signal are collected in individual waveguides of a waveguide array. In the waveguide array, the optical signal is processed to provide an analysis of the signal or to control the signal. The signal can be analyzed by Mach-Zehnder interferometers which can provide an indication of the distance of a subject from the array. By controlling the dielectric constants of the waveguides electronically, the array can serve as an aberration free focusing lens or as an aberration compensation lens. Rapid electronic control of the focal length of the lens makes the lens particularly applicable to automatic focusing systems, systems which view only objects within a selected range of distances from the array, and the compiling of in focus segments to form a wide depth of field image.
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Greenwood Darryl P.
Leonberger Frederick J.
Rediker Robert H.
Lee John D.
Massachusetts Institute of Technology
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