Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1996-01-31
1998-04-07
Le, Que
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250216, 359251, G01J 120
Patent
active
057367302
ABSTRACT:
A receiver device is intended to detect a beam of electromagnetic entry signals of a known geometry, arriving at a variable entry angle of incidence. It comprises an optical lens, comprising at least one aspherical surface capable of correcting the geometry of an incident beam according to a correction formula chosen in accordance with the entry angle of incidence, for transforming it into an incident beam and applying it to a quadratic detector. This tends to suppress the divergences of the energy received by the detector cording to the angle of incidence, and makes it possible to render substantially constant the signal-to-noise ratio of the detection and the detected signal, irrespective of the entry angle of incidence of the incident entry beam.
REFERENCES:
patent: 5012081 (1991-04-01), Jungwirth et al.
patent: 5029956 (1991-07-01), Takanashi et al.
patent: 5173810 (1992-12-01), Yamakawa
Dassault Electronique
Le Que
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