Rotational member of projector with improved retention
Slide projector having two image-projection systems which operat
Slide projector with automatic focusing system
Slide projector with automatic slide warpage compensation
Speckle reduction using a tunable liquid lens
Stabilizer for optical devices
Support structure for projector
System and method for optical calibration of a picture...
Three dimensional projection system
Video projection device having a converter lens attachably...
Video projector focus adjustment mechanism
Video projector lens angulation mechanism