Light-sensing device

Details Light-sensing device Light-sensing device

1995-12-07

1998-06-02

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

With photodetection

G01C 308

Patent

active

057608857

ABSTRACT:
A light-sensing device comprises a light source consisting of a semiconductor laser, a light-transmitting optical system having a lens surface and a diffraction grating surface arranged on the optical axis of light emitted from this light source, and a light-receiving detection system that detects any of the emitted light that is reflected from an object to be inspected. This emitted light is diffracted in at least two intersecting directions by the diffraction grating surface.

REFERENCES:
patent: 3822930 (1974-07-01), Douklias
patent: 5163319 (1992-11-01), Spies et al.
patent: 5189679 (1993-02-01), Derry et al.
patent: 5313262 (1994-05-01), Leonard
patent: 5552893 (1996-09-01), Akasu
"OPTICS", Hecht and Zajac, pp. 354-357, 1979.
Patent Abstracts of Japan, vol. 10, No. 351 (P-520), Aug. 7, 1986, Tsugito Maruyama et al.; "Slit Light Source" (JP-A-61-149919).
Patent Abstracts of Japan, vol. 12, No. 483 (P-802), Aug. 17, 1988, Koji Kamisaka, "Lens" (JP-A-63-199301).
Patent Abstracts of Japan, vol. 17, No. 615 (E-1459), Jul. 30, 1993, Tatsuya Asaga, "semiconductor Laser", (JP-A-5-190976).

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