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Old 08-06-2017, 02:18 PM #129
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

Man,
would love to see that unit lasing with 10x BE...


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Old 08-06-2017, 02:35 PM #130
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

I have a 160X beam expander it would do well with, a FAT beam, but wow, the divergence!

Special Optics 160 X Beam Expander - Album on Imgur
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Old 08-06-2017, 03:13 PM #131
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

160X Expander!!!
That would transform a 1.2mRad beam to just 7.5ÁRad! You wouldn't even notice it expanding.
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Old 08-06-2017, 03:37 PM #132
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

Quote:
Originally Posted by Alaskan View Post
I have a 160X beam expander it would do well with, a FAT beam, but wow, the divergence!

Special Optics 160 X Beam Expander - Album on Imgur
WOW 160x BE ! What's the price on something like that ? And you own that ?
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Old 08-06-2017, 04:00 PM #133
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

Omg! Seems very crazy. Maybe I'll use somehow my JL 10X BE or DL 2X at least (there is also universal adapter, but maybe the host is too big for it). Or let's see what Jack sent me in optics package - if there are sufficient lens I might build some expanding aparatus using some PVC tubes. I've just returned home, so I might spent some time with the Beautiful Beast this evening. But it is after rain with likelihood of raining, so I'm not sure about taking sky beam shots tonight.
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Old 08-06-2017, 04:32 PM #134
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

I love low divergence, bought two of those special optics expanders, one at 20X, the other at 160X.... but it has a six inch output lens, so the input on the 160X cannot be more than about 1 mm. Because of that, it wouldn't work with that laser pointer very well, but the 20X one can take a large diameter input beam with its 6 inch output collimation lens.

To find a high quality beam expander for 532nm on ebay, search for a 1064 nm IR expander, they work at 532 nm too.
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"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

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Old 08-06-2017, 05:03 PM #135
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

Quote:
Originally Posted by Alaskan View Post
I love low divergence, bought two of those special optics expanders, one at 20X, the other at 160X.... but it has a six inch output lens, so the input on the 160X cannot be more than about 1 mm. Because of that, it wouldn't work with that laser pointer very well, but the 20X one can take a large diameter input beam with its 6 inch output collimation lens.

To find a high quality beam expander for 532nm on ebay, search for a 1064 nm IR expander, they work at 532 nm too.
What about AR coating @ 532 nm (at least)?
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Old 08-06-2017, 05:25 PM #136
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

AR coatings for 1064 nm work at half the wavelength too; 532.
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Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

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Old 08-06-2017, 05:41 PM #137
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

Since 1064 is divisible by 532, it should be as theory says (AR coating should use interference to reduce reflected light from optic element surface in the AR layer), but still isn't there something omitted in consideration? Something related to AR coating material used?
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Old 08-06-2017, 06:14 PM #138
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

Well, I've looked at every coating I could find for 1064 nm and so far, they all had a dip at 532 nm too. There must be some coating which doesn't do that, but I haven't found it yet.
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Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

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Old 08-06-2017, 06:41 PM #139
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

Thanks for info a lot. Seems quite reasonable to look at them.
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"Laserpainting is a drug. Do not try it."


Current collection:
405 nm | 500 mW | Wicked Lasers Lunar
445 nm | 3.5 W | Wicked Lasers Arctic
473 nm | 100 mW | Jet Lasers PL-E Pro (Review)
520 nm | 1 W | Wicked Lasers Krypton
532 nm | 100 mW | Wicked Lasers Evo
532 nm | 800 mW | Sky Lasers PL

532 nm | 1.4+ W | Optotronics RPL-II
589 nm | 50 mW | Dragon Lasers Spartan
635 nm | 750 mW | Wicked Lasers Inferno
1 W RGB projector
(+ some laser pointers)

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LPF thread: Radim's laser painting
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Old 08-07-2017, 01:24 AM #140
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

Quote:
Originally Posted by Radim View Post
What about AR coating @ 532 nm (at least)?
A very good source for information.
https://www.edmundoptics.com/resourc...tion-coatings/
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Old 08-07-2017, 01:25 AM #141
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

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Originally Posted by Alaskan View Post
Well, I've looked at every coating I could find for 1064 nm and so far, they all had a dip at 532 nm too. There must be some coating which doesn't do that, but I haven't found it yet.
You've looked at Edmund Optics? It will work though a lot of light won't be transmitted.

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Old 08-07-2017, 05:58 AM #142
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

I've puchasef s few 1064 nm expanders and used yhem at 532 without seeing more than expected losses with an LPM. Some expanders are sold as 1064/532. I will research this more, there surely are 1064 AR coatings which aren't dual, got to be.
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Old 08-07-2017, 06:30 AM #143
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

The YAG-BBAR coating has an absolute reflectance for 532nm and 1064nm of less than 0.25%. Is that what you are talking about?
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Old 08-07-2017, 06:37 AM #144
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Default Re: Optotronics RPL-II 532 nm +1400 mW - opinions and experience?

I didn't look, Edmunds makes a AR coating good for 1064 nm which is bad at 532 nm?

Edit: There are so many different types of AR coating I bet some won't be dual, but here is an example of one which is:

https://www.thorlabs.com/newgrouppag...tgroup_id=8898


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I haven't found a 1064 nm on ebay yet which won't efficiently AR both wavelengths yet, maybe I've just been lucky.
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Last edited by Alaskan; 08-07-2017 at 06:47 AM.
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