- Jun 20, 2015
Just wanted to share my experience and some pics of a large Epson LCD video projector's zoom/focus assembly working as an excellent beam expander. An added benefit is that you do not need a collimating lens in front of the diode with this setup, the diode's output goes directly in to the assembly. The lenses are wideband AR coated and there was hardly any reflection at all from the input lest back to the diode. Output was pretty spectacular, these pictures are with an M462 and a PL520 as sources. I'm sort of itching to try this with an NUBM44..