| 摘要 |
A projector includes a lamp unit. This lamp unit includes a lamp which emits light, a shield member in which an opening portion is formed which allows light emitted by the lamp to radiate to the exterior, a cover glass fitted to the opening portion, and a retention member which retains the cover glass by squeezing it against the shield member. The retention member is provided with projecting flange portions which press against the four edges of the cover glass.
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