Parabolic solar collector body and method

Parallel digital processing system using optical interconnection

Parallel processing system with programmable optical interconnec

Penta prism mask

Phase-type diffusing plate

Phase-type focusing screen and process for manufacturing the sam

Photographing lens switchable between manual focus and auto focu

Plastic zoom lens

Polymer dispersed liquid crystal display device

Portable image display

Portable image display

Powered zoom device

Prism and optical device

Prism and real image type view finder

Prism and viewing optical system using the prism

Prism assembly

Prism for image rotation

Prism having two inner surfaces and outer shape regarded as...

Prism having two inner surfaces and outer shape regarded as...

Prism optical element, image observation apparatus and image...