Method and apparatus for determining the phase and/or...

Details Method and apparatus for determining the phase and/or... Method and apparatus for determining the phase and/or...

2006-05-30

2006-05-30

Le, Que T. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C257S290000

Reexamination Certificate

active

07053357

ABSTRACT:
A method and corresponding device for determining the phase and/or amplitude data of an electromagnetic wave. The method comprises the steps: beaming an electromagnetic wave onto the surface of at least one pixel having at least two light sensitive modulation gates Gam, Gbmand associated accumulation gates Gaand Gb, applying modulation voltages Uam(t) and Ubm(t) to gates Gamand Gbm, applying a direct voltage to accumulation gates Gaand Gb, wherein the charge carriers produced in modulation gates Gamand Gbmby the incident electromagnetic wave being subjected to a potential gradient due to the modulation voltages Uam(t) and Ubm(t), thereby drifting to the corresponding accumulation gate Gaor Gb, and forwarding the charge carriers to evaluation electronics. A plurality of corresponding pixels can be assembled to form an array.

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Suzuki et al., “Real-Time Two-dimensional surface profile measurement in a sinusoidal phase-modulating laser diode interferometer,” Optical Engineering, pp. 2754-2758 (Aug. 1994).

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