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Looks like a interesting project! I think it could be made fairly compact. However, I'm thinking to do it would require abandoning the pre-made mounts and holders. New diode mounts and mirror adjusters would have to be imagined and built. Precise machining would be needed. Not a easy...

The slow axis of MM diodes is very dependent on current (gets bigger with higher currents). The fast axis seems pretty stable. Im not sure why. If I had to guess the fast axis is basically diffraction limited due to its very small dimension. This probably keeps divergence stable in that...

Stuff like this combiner. And lots of modules built over the years. I can't recall the exact reflectivity. I think about 95% for blue.

Hundreds of them. Don't heat the glass directly, just the Aluminum. The glue on the back is fairly soft. The glue will be three small dots per mirror. It can be removed with a new sharp razor.

heat the AL mount with a heat gun or torch. After awhile the mirrors can be popped off with a sharp object like a razor blade.

I bought this ebay item and it was a tri beam diode.

Beautiful machine!

Its very complicated and can't be explained in one sentence. Audience scanning shows are set-up by highly trained individuals. They use lots of measuring, testing, math and electronic hardware to make the show safe by keeping the power of the laser under safe limits as it scans the crowd.

Sharp GH0637AA2G has a about half the divergence of the P73. It is only good for 750mW so need to knife edge or PBS two. Probably easier to just overdrive the P73 and add correction optics.

Did you short the output of the driver before connecting the diode? Residual charge in the caps can kill SM diodes real quick.

A lot of different things to consider. Size and complexity of logo, surface to be projected on, safety, are a few. Where are you located? Maybe I can help.

No personal experience with the NDB7675 . 1.8A is the sweet spot for the m462. I love the m462. To me its the perfect blue for RGB projection.

I have a few NUBM07 and really like them . My problem is I have several projectors with the m462 and the '07 don't color match with the m462. Also, its better for me to have 2x m462 than a single more powerful diode due to the 12v power supply available. The n465 might be an alternative but...

Any possibility of the m462 coming back?

You know what, the Sharp GH0637AA2G 700nW 638nm diode drops off after the rated current. Maybe Sharp rates their diodes differently?

You could blow off with air then use optical cleaning papers with reagent grade alcohol or acetone. Try not to scrub the surface. Usually I lay the cleaning paper on the surface then wet it with the solvent. Next, slowly drag the paper off the surface. Only use that area of the paper once...

Incredible! I'll have to try one of these.

Im kinda confused. Is the divergence roughly half of the M140?

Its for projector use so has to be single beam. It was supposed to be a single beam diode. Who else is selling the single beam units? And what are the specs? I took it up to 2A (max the supply could do) and man! they put out some red light.