Light amount adjusting device and projector using the same
Light amount control apparatus and projector apparatus using...
Light amount control device and projector
Light blocking panel for overhead projectors
Light-source device and projection type display device
Liquid crystal projector
Masked image projection system and method
Masking device for overhead projector
Material selective device
Method and apparatus for inhibiting projection of selected...
Microform-reader
Multi-aperture optical dimming system
Opaque adapter for overhead projector
Optical arrangement for use in a microfiche reader and method
Optical shutter with rotational axis in light path of...
Optical system with array light source
Optical system with iris controlled in real time
Outer suspension type lens shielding mask for projection...
Outer suspension type lens shielding mask for projection...
Outer suspension type lens shielding mask for projection...