An optical system includes a first expansion region that expands a luminous flux traveling in a first direction by splitting and duplicating it into luminous fluxes traveling in a second direction intersecting the first direction to increase the number of luminous fluxes, and a second expansion region that expands the luminous fluxes traveling in the second direction by splitting and duplicating them to increase the number of luminous fluxes. The first expansion region has a central region that contains a center of the first expansion region, and an end region that lies on at least one end side of the first expansion region. The end region has a diffracted light quantity less than half the diffracted light quantity in the central region.
OPTICAL SYSTEM AND HEAD-UP DISPLAY SYSTEM INCLUDING SAME
2025-01-16
Patent
Electronic Resource
English
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