Multiple wavelength quadrant detection

Details Multiple wavelength quadrant detection Multiple wavelength quadrant detection

2007-01-09

2007-01-09

Tarcza, Thomas H. (Department: 3662)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S206100, C356S141500, C359S019000

Reexamination Certificate

active

10238906

ABSTRACT:
A quadrant detector includes a holographic optical element and a plurality of detector elements. The holographic optical element is designated to have four quadrants, each of which directs radiation incident thereon to an associated detector element. Signals from the detector elements are processed individually to optimise the performance of each detector element.

REFERENCES:
patent: 4092531 (1978-05-01), Moss
patent: 4181435 (1980-01-01), Williamson et al.
patent: 4185919 (1980-01-01), Williamson et al.
patent: 4231533 (1980-11-01), Durig
patent: 6493490 (2002-12-01), Steiger
patent: 2002/0057632 (2002-05-01), Alon et al.
patent: 311340 (1989-04-01), None

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