Importance

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Abstract

A light source device includes: a light source element emitting first light; a first selective reflection element disposed at a position where the first light is incident, the first selective reflection element transmitting a component of first linear polarized light and reflecting a component of second linear polarized light; a second selective reflection element disposed at a position for receiving incident light that has passed through or been reflected by the first selective reflection element, the second selective reflection element transmitting or reflecting the incident light in accordance with a wavelength region; and a first polarization direction conversion element disposed between the first and second selective reflection element, the first polarization direction conversion element converting the first linear polarized light into elliptical polarized light. The first polarization direction conversion element converts the elliptical polarized light reflected by the second selective reflection element into the second linear polarized light.

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First Claim