Laser-based display?

Question

Hi folks,I'm interested in creating a display device thatI can build cheaply and which can cast an imageonto a wall, whether the wall is near or far.Imagine I'm walking down the street, I take abox out of my jacket, flick a switch, and a laserbegins drawing an image onto the wall of alarge building.Ideally I'd like to have a computer inside the unitthat will have enough battery-backed storageto hold several images.I am thinking that drawing scan lines like a CRTwould greatly simplify the mirror motions.Ideally, if several colors of lasers could becombined, perhaps a video signal could beused as input to draw a video onto a wall.Can anyone tell me if this has been donebefore, and how far the idea has been taken?Thanks.

martin griffith · Accepted Answer

Hmm, I think you should check out some Issac Asmiov patentsmartin

John · Answer

You're looking for a pocket-sized equivalent of the laser projectors used for light shows. If you are physically able to move several hundred pounds of batteries, you can have almost any size display you want ;-)

John B · Answer

On 07/10/2006 the venerable  etched in runes:Elektor magazine published one this month. Have a look here:-- John B

J.A. Legris · Answer

If you want a rasterized image, a DLP projector is simpler, brighterand faster than a mechanically scanned laser.--Joe Legris

John Fields · Answer

---Something like this, perhaps? :-- John FieldsProfessional Circuit Designer

Brendan Gillatt · Answer

Take a peek at this:Apparently small green lasers aren't powerful enough to project yet sono full colour.-- | Brendan Gillatt						||  brendan {at} brendan emovethis// gillatt {dot} co {dot} uk ||      				|| PGP Key: |

yubbers9 · Answer

Thanks Brendan, I've found more on that.

Laser-based display?

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