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Microscope system with on axis programmable. Fourier transform filtering
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DOI：10.1016/j.optlaseng.2016.04.008.png)
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We propose an on-axis microscope optical system to implement programmable optical Fourier transform image processing operations, taking advantage of phase and polarization modulation of a liquid crystal on silicon (LCOS) display. We use a Hamamatsu spatial light modulator (SLM), free of flickering, which therefore can be tuned to fully eliminate the zero order component of the encoded diffractive filter. This allows the realization of filtering operation on axis (as opposed to other systems in the literature that require operating off axis), therefore making use of the full space bandwidth provided by the SLM. The system is first demonstrated by implementing different optical processing operations based on phase only blazed gratings such as phase contrast, band-pass filtering, or additive and substractive imaging. Then, a simple Differential interference contrast (DIC) imaging is obtained changing to a polarization modulation scheme, achieved simply by selecting a different incident state of polarization on the incident beam. (C) 2016 Elsevier Ltd. All rights reserved.
Keyword:
Spatial light modulator (SLM)
Liquid crystal on silicon (LCOS)
Optical microscopy
Blazed gratings
Phase and polarization modulation
Differential interference contrast (DIC)
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OAAI分享收藏分享收藏Analysis of multiple internal reflections in a parallel aligned liquid crystal on silicon SLM.png)
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