A little off topic. Casio's laser/led hybrid projector has 24 1W laser diodes! http://www.youtube.com/watch?v=qswgvTwoWC0
laser diode without lenshttp://www.youtube.com/watch?v=AEH-j...eature=related
And what happens when they are focused:http://www.youtube.com/watch?v=gF4HG6v29UY
You can see in the video 24 spots of light, 16 on the wall, and 8 on the table. These are the factory lens already installed on the diodes. The person in the video appears to have removed the other lens thats spreads those 24 spots of light to produce a large, uniform light source.
Some interesting stuff from LPF:http://laserpointerforums.com/f65/44...tml#post713396
It seems the light output from a laser diode is coherent, but not collimated (parallel) until a lens is installed. At close proximity to the diode, it is dangerous, but like other light sources, its power is diminished at greater distances (but still more dangerous than bulbs or leds because of the coherent light). And the power per unit area is lower.
After a collimating lens is installed on the diode, those coherent photons are now concentrated in a small area, with low divergence and high power. And of course, if multiple lasers are converged on one spot, the power is further increased.
So you can collimate a laser, producing a dangerous, concentrated point of light that travels great distances, you can also converge that light, making it even more concentrated and dangerous (which our eyes will do if a laser is shined at them), but, you can also diverge (spread) that light and produce a safer, more bulb type output.
Also a bit of info on Sony's work on red laser diode:http://www.sonyinsider.com/2009/10/1...er- projector/
Probably read this already:http://www.sonyinsider.com/2010/03/0...or-projectors/
I'm curious to know if Kodak is keeping the lasers more focused until AFTER the DLP chip in order to improve contrast. This way when black is displayed, the laser light deflected to the light trap scatters less.