Title :
The lock-in CCD-two-dimensional synchronous detection of light
Author :
Spirig, T. ; Seitz, P. ; Vietze, O. ; Heitger, F.
Author_Institution :
Paul Scherrer Inst., Zurich, Switzerland
fDate :
9/1/1995 12:00:00 AM
Abstract :
A new type of CCD image sensor for two-dimensional synchronous detection (“lock-in imager”) is presented. The measurement principle allows each pixel to measure the size of the amplitude modulation, the relative phase and the mean brightness level (background) of an oscillating optical wave field. Design, operation and measurement results are presented. A typical application for this sensor would be in 3-D imaging (range measurement) using heterodyne interferometry
Keywords :
CCD image sensors; demodulation; light interferometry; optical images; optical modulation; synchronisation; 3-D imaging; CCD image sensor; amplitude modulation; design; heterodyne interferometry; lock-in imager; mean brightness level; measurement principle; operation; oscillating optical wave field; pixel; range measurement; relative phase; synchronous light detection; two-dimensional synchronous detection; Amplitude modulation; Brightness; Charge-coupled image sensors; Image sensors; Optical interferometry; Optical mixing; Optical modulation; Optical sensors; Phase measurement; Size measurement;
Journal_Title :
Quantum Electronics, IEEE Journal of
