Optical device and protector

Optical device and rear projector

Optical device, optical device manufacturing method, and...

Optical element and exposure apparatus

Optical equipment

Optical equipment with at least first and second ventilation...

Optical lens unit having internalized fan unit and projection ap

Optical modulator holder optical device and projector

Optical modulator, optical device and projector

Optical parts casing and projector

Overhead projector

Overhead projector

Overhead projector

Overhead projector

Overhead projector with high illuminance lamp as light source

Overheat prevention device

Photoreproduction apparatus with pulsed light projector source

Picture display apparatus and cooling apparatus for optical appa

Polarizer module

Portable projector using an LED and related heat dissipation...