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Old 03-14-2015, 05:15 AM #33
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Default Re: What diodes and power are these?? BMW Laserlight

Yea, I read another article saying 445nm works well and then later read 405 is better. I will try at 405nm next and see what I find as it is supposed to be the best wavelength which will be interesting, since 405nm is so much fainter to the eye than 445nm blue.


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Old 03-14-2015, 05:41 AM #34
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Default Re: What diodes and power are these?? BMW Laserlight

Quote:
Originally Posted by crazyspaz View Post
One of the videos about the laser headlights specifically states the lasers used are 405
YES! Finally a source of multi-watt 405nm
diodes!
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Old 03-14-2015, 05:45 AM #35
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Default Re: What diodes and power are these?? BMW Laserlight

Well, they use a pellet in those headlights, right? I bet the chemistry in those is biased towards 405 producing the brightest color white because my disk doesn't respond well at all to 405nm. I tried 980mw of 405nm and it is far lower output than my 1.9 watt 445nm blue and the color spectrum isn't nearly as white, more yellow-white.

I put both beams on the disk and 445nm produces about 20 times more brilliant white light than 405nm which when compared side by side, the 405nm "white" product looks more violet-white. It must be a chemistry bias toward 445nm on this particular product.

Edit:

More testing done: The white light coming off of the remote disk doesn't want to collimate like a laser beam, I guess that should be no surprise, given the large diameter. If I had a tiny bead made out of this material and passed the 445nm beam through it, I think it would collimate into a tight white light beam very nicely, but never as tight as a regular laser beam.
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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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Last edited by Alaskan; 03-15-2015 at 04:35 PM. Reason: reorganized to follow thread posts + added test results
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Old 03-16-2015, 05:55 AM #36
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Default Re: What diodes and power are these?? BMW Laserlight

405nm is used cause it gives them a wider gamut of color to work with. I made a light using a yellow highlighter cap and my 0.5 watt 405nm pen. It was in 560nms and i put it through a telescope and actually hit a car parked in my yard at night that was 80 feet away. 445nm can only make things give out 460+nm light.
while 405 lets you get the whole spectrum of ROGBIV.
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Old 03-16-2015, 05:37 PM #37
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Default Re: What diodes and power are these?? BMW Laserlight

The disk I have puts out a brilliant white light with a ever so slight tint of blue when illuminated with 445nm, or close to it, using an M140 laser and by comparision a somewhat dim yellow-white at 405nm with some visible violet too, as you mentioned, but difficult to see unless doing a side by side check. Of course, white has lots of colors in it anyway, I will post a graph showing the spectral output of one of these. The seller I bought my remote phosphor disks from is telling me these disks are specifically for 450-460nm. As a point of interest, he offers them in 2700K, 3000K and 4000K spectrum output but they are made up to 5000K, perhaps more.

Reading one of RHD's posts, the M140 diodes commonly put out closer to 452nm



What's this you are telling us about that yellow highlighter cap? There was something in the cap which caused 405nm to put out 560nm? Can you pass on which highlighter so I can get one to try it with? Or, are you yanking my chain, lol?
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To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


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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Last edited by Alaskan; 03-16-2015 at 07:27 PM.
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Old 07-08-2016, 03:18 PM #38
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Default Re: What diodes and power are these?? BMW Laserlight

Genuine BMW Laser Light Headlight Headlamps Retrofit Modules G11 G12 7 Series | eBay
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