Detection of the phase and amplitude of electromagnetic waves

Details Detection of the phase and amplitude of electromagnetic waves Detection of the phase and amplitude of electromagnetic waves

2007-07-03

2007-07-03

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140RC, C250S201900

Reexamination Certificate

active

10398537

ABSTRACT:
The invention relates to a device for detecting electromagnetic waves, especially for also detecting the phase and amplitude of electromagnetic waves, using elements that react sensitively to incident electromagnetic waves. The aim of the invention is to provide a method and a device for detecting the phase and amplitude of electromagnetic waves that are economical as possible and also allow relatively high resolution. To this end, the invention provides that the device has two different pixel types, one pixel type being essentially only sensitive to intensity and the other pixel type being essentially only sensitive to phase. Accordingly, two different pixel types are used in the method, one of which reacts essentially to the intensity of the incoming electromagnetic waves, while the other pixel type is phase-sensitive.

REFERENCES:
patent: 4939369 (1990-07-01), Elabd
patent: 5598261 (1997-01-01), Duncan et al.
patent: 5751427 (1998-05-01), de Groot
patent: WO 98/10255 (1997-09-01), None
Schwarte et al., “New optical four-quadrant phase detector integrated into a photogate array for small and precise 3D cameras”, Mar. 1997, Proceedings of SPIE—vol. 3023 Three-Dimensional Image Capture, pp. 119-128.

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