摘要 |
An optical device includes: a light modulation element that modulates a luminous flux emitted from a light source; a casing that houses the light modulation element; a holding member that holds the light modulation element and exposes a part thereof to outside; a refrigerant housed in a housing space surrounded by the casing, the holding member and the light modulation element; and a convection start unit that is provided in the casing and causes convection of refrigerant.
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