US 10,012,532 B2 · Optical detector

Abstract

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; and at 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.

Claims34

Dependent claims

An optical detector, comprising:

a spatial light modulator 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 two optical sensors adapted for acquisition of images at at least two different focal positions and for generation of at least two sensor signals;
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 signals for the modulation frequencies.

2 more elements

Dependencies are inferred from the claim text.

Optical detector

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Optical detector

Life of this patent

Abstract

Claims34