Back reflective mirror and back projection type video...
Back-projection display system and method for making a back-proj
Background image control by presenter position
Backlash free lens focusing apparatus
Backprojection transparency viewer
Backscreen edge contouring for off-axis large field of view...
Backup light source
Ball detection viewer
Beam alignment chamber providing divergence correction
Beam alignment system using arrayed light sources
Beam combining device and projector having such beam...
Beam splitter
Beam splitter
Beam-combining device and color image projection apparatus provi
Beam-combining device and color image projection apparatus provi
Beam-splitter folded path for rear projection displays
Beamsplitter optical projection system
Bi-directional optical apparatus for altering an optically proje
Bidirectional web medium drive
Bidirectional, cassette-loaded changer mechanism for overhead tr