Three dimensional imaging device

Details Three dimensional imaging device Three dimensional imaging device

1990-04-10

1991-05-28

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

356375, G01B 1124

Patent

active

050188542

ABSTRACT:
A three dimensional imaging device has a converging lens system defining an optical axis extending in a direction Z, and a color sensitive position sensitive detector having a series of pixels extending in at least one of two mutually perpendicular directions X and Y both perpendicular to the direction Z. The lens system serves to simultaneously image a plurality of distributed points on a target surface onto the detector to generate first data on the coordinate of each point in at least a selected one, and preferably both, of the directions X and Y. A mask with a pair of differently colored filters, e.g. red and blue, spaced apart from each other in the selected direction is mounted in the lens system for forming a pair of discrete images on the detector of each point, such images being formed each in a respective color. The result is to generate, by means of measurement of the spacing between the images, second data on the coordinate of each point in the direction Z. The first and second data can then be extracted for all the points by scanning the pixels.

REFERENCES:
patent: 4645347 (1987-02-01), Rioux
patent: 4828390 (1989-05-01), Miyoshi

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