Optical measuring system

Details Optical measuring system Optical measuring system

2004-12-09

2008-10-28

Lee, John R (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C356S121000

Reexamination Certificate

active

07442909

ABSTRACT:
Apparatus and methods are described for of measuring amplitude and phase variations in a spatially coherent beam of light. A beam of coherent light is made incident upon a spatial array of phase modulating elements displaying a pixellated first phase distribution. In a measuring region of said spatial array, the phase distribution is changed to a new value while retaining the first phase distribution outside the measuring region, for example by flashing a single pixel. The change in intensity resulting from the change in phase distribution is then determined.

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Voronstov, et al., “Advanced phase-contrast techniques for wavefront sensing and adaptive optics”,Proceedings of the SPIE, vol. 4124, 2000, pp. 98-109, no month available.
Crossland, et al., “Holographic Optical Switching: The “ROSES” Demonstrator”, Journal of Lightwave Technology, vol. 18, No. 12, Dec. 2000, pp. 1845-1854.

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