Accessory for use with an overhead projector
Adjustment method and apparatus of optical system, and...
Alignment apparatus
Alignment optimization in image display systems employing...
Animated visual effect adaptor for projectors
Apparatus and method for focusing a projected image
Apparatus and method of forming and projecting high precision op
Apparatus and method of forming and projecting high precision op
Apparatus and method of forming and projecting high precision op
Apparatus for compensating engine location for projection...
Apparatus for fine-adjusting orientation of optical device
Apparatus for positioning and adjusting a light pipe
Arrangement for addressing rays or planes of light in space
Arrangement for applying coded illuminated patterns to an object
Astigmatic lenticular projector system
Audio-video recording of overhead projector based presentations
Automatic follow-up projecting system