Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1997-11-05
1999-11-02
Le, Que T.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250236, 359216, H01J 314
Patent
active
059775360
ABSTRACT:
An all-around observation device is provided for detecting a field of view having a large solid angle. The all-around observation device comprises an imaging optical system having objective means continuously rotating with a first rotary speed about a first axis and having a rotating imaging path of rays, and a polygon wheel rotating with a second rotary speed and being located in the rotating imaging path of rays. The polygon wheel is provided with beam deflecting means for continuously deflecting the imaging path of rays each time said rotating imaging path of rays passes one polygon face of the polygon wheel, such that a field of view sector is stationary imaged during a finite observation time on a detector having a two-dimensional arrangement of detector elements. A motor is arranged to continuously rotate, with a third rotary speed, the polygon wheel and the objective means about a second axis, which forms an angle with the first axis.
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patent: 4639589 (1987-01-01), Weber et al.
patent: 4984892 (1991-01-01), Hofmann
patent: 5006705 (1991-04-01), Saito et al.
patent: 5365288 (1994-11-01), Dewald et al.
Bodenseewerk Geratetechnik GmbH
Le Que T.
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