Optical apparatus and projector

Abstract

Aspects of the invention can provide an optical apparatus including plural optical components including a reflection mirror provided in an optical path of a light beams emitted from a light source, and a case for optical components for housing and holding the plural optical components in a predetermined position with respect to the illumination optical axis of the light beams. The optical apparatus can further include a protruded part mounted to a back surface of a reflection surface of the reflection mirror, having a convex curved surface protruded to the outside of the surface of the reflection mirror and being in contact with the side wall when the reflection mirror is set along the side wall, and a pair of fixing parts respectively mounted to the back surface of the reflection surface of the reflection mirror so as to sandwich the protruded part therebetween and projecting to the outside of the reflection mirror. The case for optical components can be formed from a component housing member in the shape of a container having an opening through which the plural optical components are housed inside and a lid member for closing the opening of the component housing member, the reflection mirror can be set along a side wall of the component housing member, and the side wall can be provided with a pair of fixing grooves extending in a direction of housing the reflection mirror in the component housing member, guiding movement of the pair of fixing parts in setting the reflection mirror in the component housing member and enabling the pair of fixing parts to be provided with play.

Dependencies are inferred from the claim text.