Light projecting device with cylindrical lens

Details Light projecting device with cylindrical lens Light projecting device with cylindrical lens

1994-03-29

1996-11-05

Nelms, David C.

Optical: systems and elements

Lens

Including a nonspherical surface

396 89, 396106, G03B 300

Patent

active

055723683

ABSTRACT:
A light projecting device used to project light onto an object has a light source and a projection lens system. The light emitted by the light source is refracted by the projection lens system to form an image pattern consisting of alternate bright and dark areas. The image pattern is used to illuminate an object whose distance is to be measured using a passive distance measuring system. The projection system consists of only converging lenses.

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patent: 4804991 (1989-02-01), Ishizuki
patent: 4870442 (1989-09-01), Tejima et al.
patent: 4905034 (1990-02-01), Tejima et al.
patent: 4907026 (1990-03-01), Koyama
patent: 5051767 (1991-09-01), Honma et al.
patent: 5137350 (1992-08-01), Misawa et al.
patent: 5305047 (1994-04-01), Hayakawa

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