Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1997-09-17
1999-11-30
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
356121, G01J 120
Patent
active
059946873
ABSTRACT:
A system for the control of light beams includes a beam splitter placed on the path of the beam to be controlled and deriving a measurement beam from this beam; a detection device receiving the measurement beam and measuring the shape of the wave front of the measurement beam; a wave-front shape correction device placed on the path of the beam to be controlled, activated by the detection device and correcting the shape of the wave front of the beam to be controlled. The detection device includes a light spatial modulator providing for the selective transmission of the portions of the measurement beam; a focusing device receiving the different portions of the measurement beam; a series of photodetectors placed along the focusing plane of the focusing device; a device for the identification of the photodetector or photodetectors, detecting a light wave and computing the shape of the wave front as a function of the photodetectors identified.
REFERENCES:
patent: 3764213 (1973-10-01), O'Meara
patent: 5398130 (1995-03-01), Redman
F.L. Vladimirov, et al., "Conversion of Optical Signals in a Laser with an Intracavity Liquid-Crystal Spatial Modulator," Soviet Journal of Quantum Electronics, vol. 31, No. 10, (Oct. 1985), pp. 1363-1367.
C.B. Dane, et al., "Design and Operation of a 150 W Near Diffraction-Limited Laser Amplifier with SBS Wavefront Correction," IEEE Journal of Quantum Electronics, vol. 31, No. 1, (Jan. 1995), pp. 148-163.
Chanteloup Jean-Christophe
Huignard Jean-Pierre
Loiseaux Brigitte
Tournois Pierre
"Thomson-CSF"
Pyo Kevin
Westin Edward P.
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