Compact Polarization-Based Collimators with High Contrast

High-performance polarization-based triple-pass lenses require precise management of polarization over a range of incidence angles and wavelengths. These lenses have the potential to provide high optical power in a compact arrangement, as needed for (e.g.) wide field-of-view near-eye immersive displ...

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Bibliographic Details
Main Authors MCGETTIGAN, ANTHONY D, SHARP, GARY D
Format Patent
LanguageEnglish
Published 11.02.2021
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:High-performance polarization-based triple-pass lenses require precise management of polarization over a range of incidence angles and wavelengths. These lenses have the potential to provide high optical power in a compact arrangement, as needed for (e.g.) wide field-of-view near-eye immersive display applications. Accordingly, disclosed herein is a wide-angle polarization-based triple-pass lens that includes an input polarizer producing a first transmitted linear polarization; a first retarder-stack for converting from linear-polarization to circular-polarization; a curved partial-reflector; a second retarder-stack for converting from circular-polarization to linear-polarization; a reflective linear-polarizer; and a geometric-compensator (GC) between the input polarizer and the first retarder-stack, the second quarter-wave retarder and the reflective linear-polarizer, or both. The GC reduces the first-pass transmission of the lens for rays incident off-normal.
Bibliography:Application Number: US202016923705