Optical position detecting unit, optical coordinate input unit a

Details Optical position detecting unit, optical coordinate input unit a Optical position detecting unit, optical coordinate input unit a

1994-07-28

1996-03-26

Gonzalez, Frank

Optics: measuring and testing

By polarized light examination

With light attenuation

2502221, 345175, 345179, G01B 1114, H01J 4014, G03B 1910

Patent

active

055025684

ABSTRACT:
An optical position detecting unit is configured by an image pickup unit for detecting the intensity of light, a pattern member disposed in the front of the image pickup unit and on a light path of the light and having a specific pattern, and a signal processing unit for extracting information with respect to the distance in the direction of a normal line of a pixel array region of the image pickup unit between a light-emitting source and the image pickup unit on the basis of signals with respect to the specific pattern projected to the pixel array. A distance between the pattern member and the pixel array of the image pickup unit is required to be known in advance in order to extract the information with respect to the distance. By using only one image pickup unit, the distance to the light-emitting source can be calculated.

REFERENCES:
patent: 3951550 (1976-04-01), Slick
patent: 4092072 (1978-05-01), Ellis
patent: 4209254 (1980-06-01), Reymond et al.
patent: 4550250 (1985-10-01), Mueller et al.
patent: 4688933 (1987-08-01), Lapeyre
patent: 4710028 (1987-12-01), Grenier et al.
patent: 4851616 (1989-07-01), Wales et al.
patent: 4946277 (1990-08-01), Marquet et al.
patent: 5073770 (1991-12-01), Lowbner
patent: 5148016 (1992-09-01), Murakami et al.
patent: 5159322 (1992-10-01), Loebner
patent: 5166668 (1992-11-01), Aoyagi
patent: 5196900 (1993-03-01), Pettersen
patent: 5227622 (1993-07-01), Suzuki
patent: 5296838 (1994-03-01), Suzuki
patent: 5298737 (1994-03-01), Proper
patent: 5355222 (1994-10-01), Heller et al.
"Production of Distance Detector using PSD," Transistor Technique, Aug. 1990, pp. 79-88 Shokodo, Coding Theory, 1973, pp. 474-499.
"Maximum Length Sequence and Application thereof," Electronics, Information and Communication Society Journal, vol. 76, No. 12, pp. 1337-1340, Dec. 1993.
Gaston, C. A. "Pencil Position Monitor" IBM Technical Disclosure Bulletin, vol. 12, No. 12, May 1970, p. 2361.

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