Microvision laser projector

[White-Light]

Puzzled as to how it can be Class II and yet output 200mw.

[weartronics]

http://www.microvision.com/showwx/pd..._userguide.pdf

pg. 5

Red
AlGalnP laser diode
90 mW
635-645nm

Blue
GaN laser diode
50 mW
440-460nm

Green
Frequency doubled IR laser diode
60 mW
526-537nm

Nice, thanks!

The power levels are comparable to those of low-powered vector projectors. I don't know if the MEMS scanner could be adapted for vector scanning or if the mechanics are designed around resonant frequencies of the raster scan. But I think this type of product, especially as it becomes more of a commodity/consumer product, could be an interesting source of pre-mounted, pre-aligned, diameter/divergence matched, white-balanced RGB diodes/modules, collimators and dichros. Basically sapping all the fun out of building your own projector.

Of course, if this type of product becomes more of a commodity/consumer product, nobody would be impressed by a comparable vector projector anyway!

[aijii]

hmmm... *wonders what would happen if he swapped out the low powered crap for his 4W RGB..."

[Things]

You'd probably melt the little scanning mirrors at 4W :P

[allthatwhichis]

hmmm... *wonders what would happen if he swapped out the low powered crap for his 4W RGB..."

Do it! Do it! Do it!

[aijii]

somehow i don't think i'd fit the beam on the mems chip...

they'd have put some many hours towards getting the beams from each of the diodes exactly the same divergence/beam size...

they probably focus the beam to fit on the mems chip, then re-collimate it afterwards...

pretty cool idea though. won't be long guys before we're ripping apart "macrovision" home theatre projectors to rip the lasers out of... perfectly collimated, 445, 532 and 640nm RGB lasers...

[Serveurperso]

Hi all,

I get the showwx+ (50% brighter than showwx) from amazon to France and I love it

The Green laser is not a DPSS (808nm pump diode and Nd-vanadate + ktp doubler, system well known here.)

Microvision use the G-1000 green lasers from Corning, it's a special SHG (second harmonic generation, direct 1060 IR diode + doubler only!) green laser. This Green Laser G-1000 will be one of the most highly efficient, highest blanking speed and smallest size, for the moment.



As you can read on the web, Corning stop this "synthetic green laser" because the arrival of direct green laser diodes is imminent.

This green system will probably never find in a commercial lasershow... lol

I want dismantles a "old" showwx v1 next time, I'd like to see this totaly awesome white laser source assembly...

At aperture of the showwx, I can see clearly the resonant MEMS micro mirror, like 1mm diameter, round.

The white beam diam. is like <1mm ! divergence looks very good... and blanking speed is... lol >20KHz ?!

Have a Joyous Holiday Season!
Pascal

[LaNeK779]

it's a special SHG (second harmonic generation, direct 1060 IR diode + doubler only!) green laser.

i had thought about that a couple of years back (pumping a doubler directly with 1080) but i lack the technical skills, theoretical knowledge and funding to go on and actually build it. so it was more of a half drunk pipe dream. lucky me, someone who knew what he was doing went on and actually built it

As you can read on the web, Corning stop this "synthetic green laser" because the arrival of direct green laser diodes is imminent.

this "imminent" makes me really anxious..... any more info?

http://ntuzhchen.blogspot.com/2010/1...een-laser.html

[Serveurperso]

My english is bad, sorry, and "imminent" seems exaggerated, but it's soon for sure :

1) http://www.microvision.com/displayground/?p=1030 Microvision Signs Multi-Year Agreement with OSRAM for Supply of Green and Blue Lasers (August 6th, 2009 !)
2) http://www.azom.com/news.asp?newsID=18547 OSRAM 50mW direct green laser diode
3) http://www.picopros.com/article/osra...er-development -=> On July 20, 2010 Compound Semiconductor reported an update related to Osram Opto-Semicondustors' solid-state green laser development program... ...Companies such as Microvision have indicated that they plan to start sampling direct-emitting green laser deigns this year and will have a few designs available in production volumes by mid-2011. This gives Osram some (but not much) time to improve things if they want to get into the first PicoP® products using solid-state green lasers in 2011 !!!!

http://www.picopros.com/article/nich...ico-projectors or 510nm direct green from NICHIA....

Mid/End 2011 : Microvision ShowWX "3" with Osram or Nichia direct green

Some information for now :

This is the 3ch laser driver used by Microvision, from MAXIM, News: http://www.investorvillage.com/mbthr...1798&showall=1 and Datasheet : http://www.maxim-ic.com/datasheet/index.mvp/id/6307 !

A matching 2D Mems scanner datasheet : http://maradin.co.il/maradin-product/specification/ ...

http://www.picopros.com/article/corn...-launch-timing
Microvision use Corning G-1000 for Showwx 1, and G-2000 for ShowWX+ it is possible.
The G-2000 is 30% brighter (60mW -=> 80mW) and 60% more efficient (blue and red diode can use more power with same battery usage) and offers 20% better bandwidth than G-1000.



I don't understand how the adjustment "COLOR ALIGMENT" work on this product :
Each color can be independently moved horizontally or vertically, it's awesome I dont understand how it is technically possible with three combined lasers, and a micro-mirror MEMS....
Servo Motorised optical part?

[Serveurperso]

I get a small issue with the showwx+, I just noticed that the green output is slightly noisy, from unpacking, I can see slight horizontal lines on all white background, on Windows/VGA.

It's slightly visible even on the green, yellow or cyan part of the embedded image.

I get small power variations on the green laser, like a "superimposed white noise" of low/medium frequency.

RED and BLUE are perfect (No noise)

It's barely noticeable for normal use, but clearly visible on full power green full screen size.

I ask Microvision about this...

Pascal