OPTICAL SYSTEM, VIRTUAL IMAGE DISPLAY DEVICE, AND HEAD-MOUNTED DISPLAY
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United States of America Patent
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Issued Date -
Mar 14, 2024
app pub date -
Sep 8, 2023
filing date -
Sep 12, 2022
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Abstract
An optical system for a virtual display device includes: a light guide; a partial reflector to: transmit first image light guided in a first direction from a first side of the partial reflector through the light guide; and reflect second image light to exit outside the light guide, the second image light guided in a second direction, different from the first direction, from a second side different from the first side through the light guide; a reflector at the second side of the partial; and a polarizer. The polarizer rotates a polarization of the first image light polarized in a first polarization direction; and rotates a polarization of the second image light to polarize the second image light in a second polarization direction. The partial reflector has a lower reflectance for light polarized in the first polarization direction than for light polarized in the second polarization direction.
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