Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2004-07-12
2008-03-04
Assaf, Fayez G. (Department: 2872)
Optical: systems and elements
Diffraction
From grating
C359S569000
Reexamination Certificate
active
07339737
ABSTRACT:
A beam multiplier includes a beam-multiplying layer and an adjacent optical layer. The beam-multiplying layer is operable to generate output beamlets of light from an input beam of light, and the optical layer has an adjustable index of refraction. By switching the index of refraction of the optical layer between first and second values, one can switch the beam multiplier to a first state (e.g., “on”) where it generates the output beamlets of light, and can switch the beam multiplier to a second state (e.g., “off”) where it passes the input beam of light but does not generate the output beamlets. And by using the beam multiplier as an exit-pupil expander, one can switch the exit-pupil expander to a first state where it generates multiple exit-pupil images, and to a second state where it generates only a single exit-pupil image.
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Tegreene Clarence T.
Urey Hakan
Assaf Fayez G.
Graybeal Jackson Haley
Microvision Inc.
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