Lens-shifting device

Liquid crystal display projector

Liquid crystal display projector with a lens shading device...

Liquid crystal projector

Magnified image projector apparatus

Method and an apparatus for expanding magnification range of a p

Method and apparatus for detecting the focusing condition of an

Method of automatically focusing glass-mounted and glassless sli

Microfiche reader

Microfilm image processing apparatus having automatic focus cont

Microfilm reading device

Multiple lens image rotation system

Objective lens exchanging arrangement in a microfilm reader

Optical apparatus in which image distortion is removed

Optical device

Optical projection module

Optical resizing apparatus

Optical structure for microfiche reader

Overhead projector

Overhead projector of the under mirror type