Optical device using laterally-shiftable diffraction gratings

Details Optical device using laterally-shiftable diffraction gratings Optical device using laterally-shiftable diffraction gratings

2010-01-25

2011-12-06

Lavarias, Arnel C (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S573000

Reexamination Certificate

active

08072684

ABSTRACT:
A double-sided grating divider acts as a light switch where the upper and lower grating dividers are arranged to accommodate a relative lateral shift therebetween of about one-fourth of the period of the diffraction grating elements and where the critical refraction angles of the grating dividers are more than about 43.6°. Lateral shift may be achieved by various devices including MEMS and metal couplers having a known/calibrated thermal coefficient of expansion over a temperature range of interest.

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