Optical detector

摘要

An optical detector (110) is disclosed, the optical detector (110) comprising:
at least one spatial light modulator (114) being adapted to modify at least one property of a light beam (136) in a spatially resolved fashion, having a matrix (132) of pixels (134), each pixel (134) being controllable to individually modify the at least one optical property of a portion of the light beam (136) passing the pixel (134);at least one optical sensor (116) adapted to detect the light beam (136) after passing the matrix (132) of pixels (134) of the spatial light modulator (114) and to generate at least one sensor signal;at least one modulator device (118) adapted for periodically controlling at least two of the pixels (134) with different modulation frequencies; andat least one evaluation device (120) adapted for performing a frequency analysis in order to determine signal components of the sensor signal for the modulation frequencies.

主权项

1. An optical detector, comprising:
at least one spatial light modulator within the optical detector and which modifies at least one property of a light beam in a spatially resolved fashion, said modulator comprising a matrix of pixels, each pixel being controllable to individually modify the at least one optical property of a portion of the light beam passing the pixel; at least one optical sensor which detects the light beam after passing the matrix of pixels of the spatial light modulator and for generating at least one sensor signal; at least one modulator device which periodically controls at least two of the pixels with different modulation frequencies for activation of the at least two of the pixels; and at least one evaluation device which performs a frequency analysis in order to determine signal components of the sensor signal for the modulation frequencies.