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Old 02-16-2015, 12:52 PM #33
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Default Re: RGB Diffraction Grating

Alaskan if you would like the thing I pictured you can have it. I'm hoping someone will find use out of it and maybe have fun with it.


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Old 02-16-2015, 04:32 PM #34
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Default Re: RGB Diffraction Grating

My favorite part about this thread is how it was revived after 4 years and we go on talking about it like nothing happened .
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Old 02-16-2015, 07:25 PM #35
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Default Re: RGB Diffraction Grating

Starlight, I think it might go to waste with me, I already bought a 3CCD prism on ebay a couple of days ago which I believe is more suited to what I was looking for, but thank you for your kind offer.

Old threads can be revived if you are adding to the thread or seeking more of the same kind of information, it is only when someone adds to an old thread with "oh so cool" or something like that it's considered necro'ing, at least, according to Ped and I like his position on that. I can see a reason to allow it, better to add more to an old thread than start a new one.
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Old 02-17-2015, 03:12 AM #36
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Default Re: RGB Diffraction Grating

Right, I guess. But I wonder how you even stumble upon something like this? I mean it's 4 years old.
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Old 02-17-2015, 05:10 AM #37
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Default Re: RGB Diffraction Grating

I searched through pasts posts in the forum, sometimes I will do that for quite a while and if I find a thread which is on the same subject, but need more info, I figure it's better to add to it than make a new one, that way all of the info is in one thread for the next person to come to the same well.
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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 02-17-2015, 06:32 AM #38
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Default Re: RGB Diffraction Grating

I'd go with these mostly because they're cheap for 3x of them compared to other sources. They're also the taller and higher quality variety compared to the really cheap ones you'll find in many cheapo RGB setups on eBay.

I wouldn't bother with the swivel head ones. I'm not even sure what the point of the swiveling head is, as you usually don't need that degree of freedom when trying to combine beams. They lack the flexure-based adjustment screws too, which is what is used to fine-adjust and set the angle of the dichro. At the time, some guy on the forum was also selling them for way too much compared to the ones I linked to above.

You should also buy some hex-socket screws and washers to mount these to a metal plate. I bought boxes of 100x on Amazon so that I wouldn't ever run out.
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Old 02-22-2015, 12:48 AM #39
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Default Re: RGB Diffraction Grating

I now have 3 of both types, I'm hearing the swivel heads don't need periodic tweaking compared to the flex type. Now i'm on the fence!

Last edited by Alaskan; 02-22-2015 at 12:48 AM.
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