Patent ID: 7375757

Claim:
An optical system having an optical module, the optical module comprising: an optical element including a light receiving portion, said light receiving portion being between a shielding layer and a lens; an optical filter between said lens and a diaphragm portion of a lens barrel, an opening through said diaphragm portion exposing said optical filter; a plate between said lens barrel and a wiring board, said wiring board being between said optical element and said plate, wherein said plate is of a first material, said wiring board being of a material other than said first material, wherein said light receiving portion and said lens are disposed along an optical axis, wherein a through-hole extends through said lens barrel, said plate, and said wiring board, wherein said optical axis extends through said opening, said optical filter, and said through-hole, wherein said lens barrel is in an inner periphery of a holder, said plate being between said holder and said wiring board.