Anyone Built...

[Bbe]

My RGB in process, but with spatial filter and TEC cooling-heating

[norty303]

Lovely little shipping crate too

[jors]

Nice build!
On red section, Do you obtain better beam profile with Plano-concave curved side towards diode? We usually orient PC flat side towards diode...

[logsquared]

Nice build!
On red section, Do you obtain better beam profile with Plano-concave curved side towards diode? We usually orient PC flat side towards diode...

Planters had made a post awhile back about getting better results with some of the lenses reversed. I tried it with Dave's cylinders and some from Edmonds I had around. I could not get a improvement then. These lenses are from Edison. I saw a huge (20%) reduction in spot size with the PC reversed! I believe it may be due to the thickness of the edison PC lens. I think the thickness allowed the rapidly expanding beam to converge a lot inside the glass before hitting the curved side.

[logsquared]

Want to try these setups soon. The idea is going with only ONE cylinder set correction for all diodes.

I want to try this also. I tried it with a single 300mm FL cylinder. It worked! But with a 4, 6, 8 power telescope I fear focusing all the spots may be harder. However, the telescope on the green and blue is much more tolerant of distance from the diodes so it may be possible.

[jors]

Planters had made a post awhile back about getting better results with some of the lenses reversed. I tried it with Dave's cylinders and some from Edmonds I had around. I could not get a improvement then. These lenses are from Edison. I saw a huge (20%) reduction in spot size with the PC reversed! I believe it may be due to the thickness of the edison PC lens. I think the thickness allowed the rapidly expanding beam to converge a lot inside the glass before hitting the curved side.

I agree, I also tried with PCs from Dave & Edmund and didn't noticed better results on this setup

[jors]

I want to try this also. I tried it with a single 300mm FL cylinder. It worked! But with a 4, 6, 8 power telescope I fear focusing all the spots may be harder. However, the telescope on the green and blue is much more tolerant of distance from the diodes so it may be possible.

Yes, I looked at your thread, impressive diode centering mounts!!

[logsquared]

Yes, I looked at your thread, impressive diode centering mounts!!

Thanks!

I made a crappy paint drawing of what I think happens with thicker lenses. The further you get from center of the incoming beam the more it refracts on the plano surface. I believe this causes the aberrations. Maybe someone smarter/ more versed in optics can give more insight.

[andy_con]

i would agree with you on this one, again not clued up on it though

Thanks!

I made a crappy paint drawing of what I think happens with thicker lenses. The further you get from center of the incoming beam the more it refracts on the plano surface. I believe this causes the aberrations. Maybe someone smarter/ more versed in optics can give more insight.

[jors]

Thanks!

I made a crappy paint drawing of what I think happens with thicker lenses. The further you get from center of the incoming beam the more it refracts on the plano surface. I believe this causes the aberrations. Maybe someone smarter/ more versed in optics can give more insight.

nice explanation, thanks!