Distributed coaxial light source producing constant target lumin

Details Distributed coaxial light source producing constant target lumin Distributed coaxial light source producing constant target lumin

1989-03-08

1990-06-05

Peng, John K.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358475, 362 12, 362 13, H04N 718

Patent

active

049318667

ABSTRACT:
A luminous source for illluminating targets in e.g. machine vision systems, remote manipulator systems used in outer space, etc., producing nearly constant target luminance as the target maintains various distances from the camera. This is achieved by the luminous source having a dual concentric ring shape of predetermined radii, intensity ratios and radial widths.

REFERENCES:
patent: 4219847 (1980-08-01), Pinkney et al.
patent: 4423953 (1984-01-01), Burnham
patent: 4731854 (1988-03-01), Gonzalez
patent: 4841341 (1989-06-01), Ogawa et al.

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