Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1996-02-12
1999-02-09
Font, Frank G.
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
356357, 356358, 356359, 356349, 356376, G01B 902, G01B 1124
Patent
active
058701915
ABSTRACT:
Apparatus and methods of measuring position information, typically the depth coordinate, of a point on the surface of an object. In one embodiment, the apparatus includes two sources of radiation positioned to illuminate the point on the surface of the object with radiation from each of the sources. The radiation from each of the sources is coherent with respect to the radiation from the other source. A control system changes the phase of the radiation from at least one of the sources relative to the phase of the radiation from the other source as measured at the point on the surface of the object. A detector is positioned to receive radiation scattered by the point and a processor, in communication with the detector, calculates position information in response to the change in phase of the radiation from the source and the received radiation scattered by the point on the surface of the object.
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Mermelstein Michael S.
Shirley Lyle G.
Font Frank G.
Massachusetts Institute of Technology
Merlino Amanda
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