Differential interferometric light modulator and image...

Optical: systems and elements – Optical modulator – Light wave temporal modulation

Reexamination Certificate

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C359S291000

Reexamination Certificate

active

11161452

ABSTRACT:
A differential interferometric light modulator and image display system comprises a polarizing beam splitter, a polarization displacement device and a linear array of MEMS optical phase shifting devices to modulate a line image. The polarizing beam splitter acts as both the polarizer and the analyzer in an interferometer. The polarization displacement device divides polarized light from a polarizer into orthogonal polarization components which propagate parallel to one another. The MEMS optical phase shifting device array imparts a relative phase shift onto the polarization components and returns them to the polarization displacement device where they are recombined and sent to the analyzer. The MEMS optical phase shifting devices are electronically controlled and convert electronic image data into actual light modulation.

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M. Francon, Optical Interferometry, Academic Press, New York, 1966; chapter VII, “Polarization Interferometers”.
M. Francon andS. Mallick, Polarization Interferometers, John Wiley & Sons, New York, 1971; chapter 1, “Introduction to Polarized Light” and chapter 2, “Birefringent Beam-splitters”.

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