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Old 10-03-2016, 10:30 PM #1457
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Default Re: Post your random pics!

Quote:
Originally Posted by RB astro View Post
How cool is that !
I used to collect them as well, had a nice big variety of samples.
Passed them on to my sons too.

I guess all us dads think the same.


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Old 10-04-2016, 02:21 AM #1458
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Default Re: Post your random pics!

Quote:
Originally Posted by RB astro View Post
How cool is that !
I used to collect them as well, had a nice big variety of samples.
Passed them on to my sons too.

I used to collect as well! Didn't do much hounding just buying and being in lapidary clubs. Looks like I'm young enough to still have my collection I may sell some of them though, I have at least a few grand that I could sell and put towards a mean laser, some camera equipment that I'd love, or dare I say.... put it in a savings account.... eugh.
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Old 10-06-2016, 04:25 PM #1459
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Default Re: Post your random pics!

Fiber coupled Argon as best I can tell:



Some argon pumped dye lasers:







And these beautiful 12W RGB modules from Aten Laser:



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Old 10-06-2016, 05:42 PM #1460
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Default Re: Post your random pics!

Beautiful images of lasers I must say. Love that rgb.
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Optotronics offers some of the highest output DPSS Portable Greens on the market. Their 1.4W RPL-II is by far their most amazing product and is known to be overspec.
Optotronics RPL 532nm DPSS Portables

Dragon Lasers offers the best option for 589nm (Yellow) Laser pointers.
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Old 10-06-2016, 05:50 PM #1461
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Default Re: Post your random pics!

Quote:
Originally Posted by CurtisOliver View Post
Beautiful images of lasers I must say. Love that rgb.
Yeah, I was really impressed with that RGB, great looking build quality, very neat, well thought out.

It's smart too - he's using achromatic lenses to spatially filter R, G and B all at the same time instead of individually.
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Last edited by diachi; 10-06-2016 at 05:51 PM.
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Old 10-06-2016, 06:46 PM #1462
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Default Re: Post your random pics!

That's a smart system. I want one.
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Notable products/sites:

Jet Lasers offers various high quality Diode/DPSS Portables in their PL-E Pro hosts. Jet Lasers are known for their quality and are respected on LPF.
Jetlasers PLE Pro's

If you are after an RGB module, you can't go wrong with Optlasers. Their 400mW model is very high quality.
Optlasers RGB Modules

Optotronics offers some of the highest output DPSS Portable Greens on the market. Their 1.4W RPL-II is by far their most amazing product and is known to be overspec.
Optotronics RPL 532nm DPSS Portables

Dragon Lasers offers the best option for 589nm (Yellow) Laser pointers.
Dragon Lasers Yellow Laser Pointers

Sanwu are known to be very high quality and every newcomer should check them out.
Sanwu Home

Bang good is a good source for many electrical items and are often cheap and reliable.
Bang Good Home

For reliable safety goggles visit Survival Laser. Use LPF445 for a 10% member discount.
Eagle Pair Safety Goggles

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Which company should I buy from? By Sta




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Old 10-06-2016, 07:28 PM #1463
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Default Re: Post your random pics!

Quote:
Originally Posted by CurtisOliver View Post
That's a smart system. I want one.

Likewise, the price is a little outside my budget of $0 though...
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Old 10-06-2016, 09:41 PM #1464
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Default Re: Post your random pics!

Weird how they chose to use 3 successive X-axis expansion stages on the red.
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Old 10-06-2016, 09:53 PM #1465
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Default Re: Post your random pics!

Quote:
Originally Posted by Cyparagon View Post
Weird how they chose to use 3 successive X-axis expansion stages on the red.

I'm not seeing it ... I see two cylindrical lenses for the X-axis correction and then two anamorphics for for Y-axis correction - which makes sense if you're trying to match diameter/divergence with the blue/greens.

Then there's the achromatic lenses for the telescope/spatial filter - which don't look like they're doing much in the way of expanding the beam, seems like it's more just for the sake of spatial filtering.
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Old 10-06-2016, 10:39 PM #1466
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Default Re: Post your random pics!

Quote:
Originally Posted by diachi View Post
I'm not seeing it ... I see two cylindrical lenses for the X-axis correction and then two anamorphics for for Y-axis correction - which makes sense if you're trying to match diameter/divergence with the blue/greens.

Then there's the achromatic lenses for the telescope/spatial filter - which don't look like they're doing much in the way of expanding the beam, seems like it's more just for the sake of spatial filtering.
That spatial filter looks very much like every other one I've seen. I don't see it doing more than that. These are used a lot in holography, where i have my experience with them.
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Old 10-06-2016, 10:45 PM #1467
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Default Re: Post your random pics!

Quote:
Originally Posted by paul1598419 View Post
That spatial filter looks very much like every other one I've seen. I don't see it doing more than that. These are used a lot in holography, where i have my experience with them.

Yep, exactly, just doing regular spatial filtering, except with RGB instead of one wavelength.

Only difference really is that it's a proper pinhole with an adjustable mount rather than some razor blades and magnets...
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405nm | Banggood LT-850 | "5mW" | Review Unit | Review WIP
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445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
450nm | LaserPointerStore - Thor H2 | 1W(?) | Review Unit | >>Review<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD-850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
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Old 10-06-2016, 11:02 PM #1468
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Default Re: Post your random pics!

Quote:
Originally Posted by diachi View Post
Yep, exactly, just doing regular spatial filtering, except with RGB instead of one wavelength.

Only difference really is that it's a proper pinhole with an adjustable mount rather than some razor blades and magnets...
Every one I've ever seen is a proper pinhole of specific size and adjustable in three axes with usually a microscope objective lens. Never really saw a razor blade one, though I have seen a text that had a do-it-yourself spatial filter using an aluminum foil pinhole with a convex lens.
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Old 10-06-2016, 11:15 PM #1469
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Default Re: Post your random pics!

Quote:
Originally Posted by paul1598419 View Post
Every one I've ever seen is a proper pinhole of specific size and adjustable in three axes with usually a microscope objective lens.

A bunch of the DIY builds I've seen are using razor blades and magnets (Which work just fine) or home made pinholes and magnets, which also work just fine.

Best way to do it of course is with a proper pinhole and adjustable mounts. Just not as cheap.
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Old 10-07-2016, 12:36 AM #1470
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Default Re: Post your random pics!

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Originally Posted by diachi View Post
I'm not seeing it ... I see two cylindrical lenses for the X-axis correction and then two anamorphics for for Y-axis correction
All three of these are clearly X-axis. The prisms would have to be 90 degrees rotated along the beam axis to affect the Y axis instead.

The Y axis size is chosen by the collimating lens (with the X axis size being a function of this and dependent on the emitter shape). If you wanted a different Y size, you'd chose a different collimating lens, not add a bunch of optics elsewhere.

The only reason two prisms are used instead of one, is to preserve beam direction. One works just as well (if not better) otherwise. In my projector, I use just one, and have the red at a funny angle.
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Last edited by Cyparagon; 10-07-2016 at 12:45 AM. Reason: addition/clarification
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Old 10-07-2016, 12:49 AM #1471
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Default Re: Post your random pics!

Quote:
Originally Posted by Cyparagon View Post
All three of these are clearly X-axis. The prisms would have to be 90 degrees rotated along the beam axis to affect the Y axis instead.

The only reason two prisms are used instead of one, is to preserve beam direction. One works just as well (if not better) otherwise.

I'm not seeing that ... The two cylindrical lenses are correcting the X, or horizontal axis. The prism pair is correcting the Y, or vertical axis - they (the prisms) are quite clearly rotated 90 degrees to be on their side, refracting the beam (and thus correcting it) on the vertical axis. The achromatic lenses are focusing both axes (but seemingly doing no correction on their own, other than creating a focal point at the pin hole) as they are either spherical or aspherical.
Am I missing something?
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Old 10-07-2016, 12:58 AM #1472
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Default Re: Post your random pics!

No, I retract that. You're correct. The prisms are expanding Y for the red, but not the others.

The weird photo angles and glare got me turned around. My second point still stands:

Increasing Y size would not only be easier and cheaper using a different collimating lens to begin with, it would also increase X size, lessening or eliminating the need for X axis expansion.

If they were using the prisms backwards (hard to tell the angle here) to constrict Y instead of expand it, it would still be easier and cheaper to use a different collimating lens and simply expand X more. Best guess is they could only find one size of cylinder lens... or they wanted to use the same collimating lenses everywhere to keep BOM/sources low. I still would have done it differently.
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