Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1993-10-06
1996-05-28
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
2502062, 3561413, 3561415, G01C 2102
Patent
active
055213731
ABSTRACT:
A radiation source directs radiation toward a radiation sensor in such a way that the intensity of radiation sensed by the radiation sensor alternates in a periodic manner as the radiation source moves radially relative to the radiation sensor. The radiation sensor generates either a "1" or a "0" depending upon whether the intensity of the radiation sensed by the radiation sensor is above or below a particular reference value. Thus, the angular position of the radiation source relative to the radiation sensor is indicated by an alternating series of "1"s and "0"s. A multi-bit binary value which indicates the absolute position of the radiation source relative to the radiation sensor can be generated. In this case, a band of radiation is directed toward the radiation sensor. The radiation band is separated into a plurality of portions, the intensity of each successive portion being twice the frequency of the preceding portion. Each portion of the radiation band impinges upon a corresponding sensor. The signal generated by each sensor element is thus one bit of a multi-bit binary value which varies as the radiation source moves radially relative to the radiation sensor.
REFERENCES:
patent: H412 (1988-01-01), Miller, Jr. et al.
patent: 3413515 (1968-11-01), Haring
patent: 3651508 (1972-03-01), Scarborough, Jr. et al.
patent: 3858201 (1974-12-01), Foster
patent: 4086485 (1978-04-01), Kaplow et al.
patent: 4193689 (1980-03-01), Reymond et al.
patent: 4314761 (1982-02-01), Reymond et al.
patent: 4329684 (1982-05-01), Monteath et al.
patent: 4367465 (1983-01-01), Mati et al.
patent: 4521772 (1985-06-01), Lyon
patent: 4550250 (1985-10-01), Mueller et al.
patent: 4565999 (1986-01-01), King et al.
patent: 4576481 (1986-03-01), Hansen
patent: 4626100 (1986-12-01), Johnson
patent: 4857721 (1989-08-01), Dunavan et al.
patent: 4914283 (1990-04-01), Brinckmann et al.
M. Sakaguchi and N. Nishida; "The Hologram Tablet-A New Graphic Input Device"; Fall Joint Computer Conference, 1970; pp. 653-658.
Grimaud Jean-Jacques G.
Harvill Young L.
Lanier Jaron Z.
Oberman Mark L.
Teitel Michael A.
Nichols Steven L.
VPL Research Inc.
Westin Edward P.
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