Patent ID: 7686458
Filing Date: 2010-03-30
Classification: G02B,G03B

Abstract:
1. A supporting mechanism of a reflector of a projection apparatus, said projection apparatus comprising a reflector having a reflection surface of a rotationally-symmetrical shape about an optical axis, and being configured to reflect light at an area of said reflection surface that does not include said optical axis, said supporting mechanism comprising: a pivot supporting portion using a pivot mechanism including a member with a spherically-shaped end and a member with a bowl-shaped end contacting each other, said pivot supporting portion being configured to position said reflector at a position of said optical axis of said reflection surface or in the vicinity of said optical axis so that said reflector is rotatable about a pivot point as a rotation axis of said pivot mechanism; a fixing member having a supporting surface that supports said reflector, and a plurality of slide supporting portions each of which includes a member with a substantially spherically-shaped end and a member with a flat end contacting each other at a point, said slide supporting portions being configured to slidably support said reflector with respect to said supporting surface of said fixing member, each of said slide supporting portions having an adjusting mechanism for adjusting a supporting position of said reflector in a heightwise direction, wherein said pivot supporting portion and said slide supporting portions support said reflector at least three points.