Question about anamorphic prisms

[edison]

exactly. If you stack 4 blue diodes like this llll and then shoot it trough a small hole of 3mm then the beam will be round. You probably end up with 3.5 watt of blue but who cares

I have a customer and he told me how he looks at things. When the divergence is low and the beam is thight no one cares about losses.

[dnar]

Yep, with the 445nm diodes we have power "to burn". Be careful with reflections when using a pin-hole. I painted mine in stove black, as with the internals of the B&K housing.

[LaNeK779]

i was thinking to sand it a fair bit to make a rough surface and then paint it black

[kitatit]

With my 445 prism build, I cropped the beam at aperture to "round" it up. At 17M I have a round spot.

Hi Wayne,
I'm real keen to see your results. I was thinking the same thing a while ago but after reading this thread below, it sounded like it wouldn't work that well.
http://www.photonlexicon.com/forums/...Spatial+filter

Have you got any pics of the beam with and without your pinhole?

Graphics ability is quiet important to me and it would be great if this method helped tidy up the beam.

[dnar]

Hi Wayne,
I'm real keen to see your results. I was thinking the same thing a while ago but after reading this thread below, it sounded like it wouldn't work that well.
http://www.photonlexicon.com/forums/...Spatial+filter

Have you got any pics of the beam with and without your pinhole?

Graphics ability is quiet important to me and it would be great if this method helped tidy up the beam.

Hi Kit, here is a shot of the final beam after pinhole. Taken at 500mW, single diode with Simon's prisms. The daytime photo with the green shows the beam is tight, the 532nm is the CNI 1.5mrad.

[absolom7691]

Very nice! What size pinhole were you using?

[kitatit]

Hi Kit, here is a shot of the final beam after pinhole. Taken at 500mW, single diode with Simon's prisms. The daytime photo with the green shows the beam is tight, the 532nm is the CNI 1.5mrad.

Niiiiiiice wow thats great! that opens up a few possibilities. Thanks for the pics.

Time spent in your upstairs bat cave is clearly yielding results!

[dnar]

Very nice! What size pinhole were you using?

Much larger than you would think. I'll measure it and get back to you.

Niiiiiiice wow thats great! that opens up a few possibilities. Thanks for the pics.

Time spent in your upstairs bat cave is clearly yielding results!

Slowly. This projector build is one year in and counting!!!!

You now have a set of Simons prisms, they are what I am using. Prisms and pinhole. No moving parts lol.

Here is a shot of the pinhole blue and my CNI green, quad red after a bounce mirror (10 meters?). The 1.5mrad CNI green is the fattest beam!!!

[absolom7691]

Here is a shot of the pinhole blue and my CNI green, quad red after a bounce mirror (10 meters?). The 1.5mrad CNI green is the fattest beam!!!

This is awesome. This is exactly what I am looking for. This should really help with graphics!

[absolom7691]

Just got my prism pair today. I am wondering if some of these 445's have better beam profiles than others. I just popped another 445 into a housing and I am using a generic glass collimator and it has a pretty tight beam. I am going to throw the optics on to clean up the FA but this looks really damn good.

dnar, were you able to measure your pinhole? I am curious to try that out. I have a pretty good beam already, but if I can round it up, it will be on par with my 640 and 532.