Old 07-06-2009, 06:56 PM #1
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Default Interesting paper about micro laser projectors

http://www.optics.arizona.edu/opti58...nProjEngin.pdf

I need one!!


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Old 07-06-2009, 09:27 PM #2
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Default Re: Interesting paper about micro laser projectors

"The LPD engine is comprised of a red laser (635 nm), a blue laser (440 nm) and a green laser (532 nm)."

Based on the diagram it would appear as thou they have a dpss green but the red and blue are simply collimated diodes. Maybe one of our more experience memebers could shed some light for me I thought that wavelength had to come from dpss.

EDIT-I read further in the paper and it does say the 440mn is a semicondutor LD like the red Man i wish i had one of these
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Old 07-06-2009, 09:29 PM #3
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Default Re: Interesting paper about micro laser projectors

If you're referring to the 440nm wavelength, they are diodes. 440nm blue diodes are a recent development, but they are easily (but expensively) available to the general public.
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Old 07-06-2009, 09:34 PM #4
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Default Re: Interesting paper about micro laser projectors

Oh, sorry i was a little vague with my first comment but you got it anyway
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Old 07-06-2009, 09:40 PM #5
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Default Re: Interesting paper about micro laser projectors

Quote:
Originally Posted by ElektroFreak View Post
If you're referring to the 440nm wavelength, they are diodes. 440nm blue diodes are a recent development, but they are easily (but expensively) available to the general public.
If this is approved and mass produced maybe the production of real green laser diodes could grow and be readily available for everybody
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Old 07-06-2009, 09:43 PM #6
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Default Re: Interesting paper about micro laser projectors

Green diodes are the last link in the "practical HD laser projection" chain. DPSS lasers are just too unstable. These units still use DPSS for green, but they talk about the fact that it limits the system in several ways. Green diodes would make the unit smaller, cooler, and greener(literally)..
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Old 07-06-2009, 10:01 PM #7
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Default Re: Interesting paper about micro laser projectors

I can't for the life of me find an old post, it was on the old forum. it had a link to an actual mini laser projector. do any of you guys remember this. it was small, rectangular, and about an inch thick, and it was blue. please tell me i'm not crazy.

thanks
michael

edit. it was really bugging me. so i spent some one on one time with google. and got 2 links. this one that i found uses a green diode.
this is for the how it works, a cool little movie.
Microvision: How The PicoPô Display Engine Works

this is a description
Microvision showcase Pico Projector for mobile devices
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Old 07-07-2009, 03:26 AM #8
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Default Re: Interesting paper about micro laser projectors

It doesn't use a green laser diode, but it will.

III-V green laser diodes haven't been published. If one exists, it's not known outside of the R&D department that made it. The highest published wavelength is 515nm, but even that was using some trickery that won't really be doable for mass production. When something is published, we'll hear about it pretty quickly afterwards. And I feel like it'll get published pretty quickly after it gets made.
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Old 07-07-2009, 04:07 AM #9
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Default Re: Interesting paper about micro laser projectors

I want to build one of those. Would my 100 watt soldering gun be OK to make the connections?? :-)

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Old 07-07-2009, 09:43 AM #10
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Default Re: Interesting paper about micro laser projectors

Sure, just file the tip to a pencil point :-)
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Old 07-07-2009, 10:59 AM #11
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Default Re: Interesting paper about micro laser projectors

That must be one *tiny* AOM in that thing, in fact with the use of an AOM the green will actually have better modulation than the red and blue diode lasers. When these projectors become cheap they could have some fun parts to play around with !
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Old 07-07-2009, 01:25 PM #12
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Question Re: Interesting paper about micro laser projectors

Wondering if, improving and developing green diodes, they want to make a combined RGB diode for minimize the size ..... "combined", i mean like the actual red/ir in a single case

but they can have focal lenght focusing problems, after ..... or need to use holographic lenses that act at a different FL for each wavelenght .....
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