Low Divergence Projector- A New Video

[JRGixxerfreaK1]

Planters,

Thank you for making this kind of video!

Sorry to go off your topic,
Is there a possibility you could test those osram 520nm in cold temp?

Would be interesting!

[White-Light]

Love the machining quality in the projector.

I suspect the double lining near the corners is the result of the scanners being slightly over speed - the corners also slightly rounded. The same thing was seen the 506 video when it was pushed to around 50+ degrees. Would be interesting to see if it re-aligned and squared off if you reduced the scan angle.

Love your builds.

[planters]

JR,

The second projector (built to house the Saturn's) might actually use a pair of the 1W 520s. I plan to deeply cool these like the reds, but the cost ($720 each from DTR) is still kinda painful. I am pretty sure that like their 445nm sisters the all GaN 520s will probably color shift very little, but increase in efficiency 5-15% within the temp range achievable with TEC's.

White-Light,

I think you are right about the combination of speed and projection angle. I can see the rounding decrease and the dbl line width decrease as the speed is dropped, but these "60,000" kpps scanners are running @ 42K @ 25 degrees. This is neither very vast or very wide and if the rotor shaft twists or the position feedback is slow or inaccurate then whatever the mechanism this is going to limit projector performance. Both the DT and PT 40s in my other satellite projectors show these aberrations only much more pronounced and at 25K @ the same scan angle.

[TechJunkie]

Amazing high end construction Eric. I could never come close to building anything like that. You're a true artist of design, and function.

I watched some of your other videos and they are very informative, although I probably only understand half of it. Your spatial filter design is simple, and genius at the same time. And your workshop looks like it could withstand a hurricane. Very impressive all the way around.

LOL @ when you say "Finagle". You can tell you're a New Englander.

[planters]

LOL @ when you say "Finagle". You can tell you're a New Englander.

Actually, I'm from Chicago, but we love the mountains. In fact, one of my other projects actually did survive a hurricane and ended up supporting the building that was designed to house it. I'll tell you about it in the spring.

[Stiffler]

Eric,

Besides the telescopes & spatial filters, is there any other beam correction optics being used on the blue & red? I would expect to see prisms on the blue, but unless I am missing something they appear to be absent in this build. Awesome video as usual, I look forward to watching your future videos.

-Eric

[planters]

The red uses an Optima 4mm collimnator and the blue uses the stock (from the projector) aspheric collimnator. I do not think I will be using prisms very much in the future. I have a couple of pairs for sale...now.
The blues are now so powerful that hard driving a PBSed pair can give over 5W of blue. The red and blue beams can be better expanded with a cylinder pair as long as the beam is on axis.

One application that I can envision for the prism pair would be a 10W blue quad, colored cyan by a pair of the DPSS lasers that will become available when the direct greens start being placed in projectors. A couple of these 15W moving heads on each side of a stage and watch out...LOBO.

[f150trk21]

Hope I got it right

[planters]

Wow! You sure did. And for the one I'm building to showcase the Saturn scanner I will probably replace the DPSS with a green module/beam line almost identical to the red (cooled/enclosed). I am waiting for the price of the 520nm diodes to drop and will replace the DPSS when it makes sense. Also, I will be improving the base plate cooling (a lot) with a pair of water cooling systems from Corsair. This should allow the enclosed modules to drop even lower.

[dnar]

Simply amazing Eric! I also loved watching your high powered pumped green laser video, I learn so much from each video so thanks!