NEOS Acousto Optic Beam Deflector FA on Ebay

[LaserLover]

If your into super high speed scanners, Laser TV or just want the highest quality scanner possible and do your own design and building then checkout this auction at " http://tinyurl.com/yksh95 "

Good luck bidding and see my other auctions.

Rick

[Astroguy]

If your into super high speed scanners, Laser TV or just want the highest quality scanner possible and do your own design and building then checkout this auction at " http://tinyurl.com/yksh95 "

Good luck bidding and see my other auctions.

Rick

To do a laser TV wouldn`t you need two? One to sweep back and forth and one to sweep up and down. Or does this do both?

[buffo]

Fred:

Nah, you only need one - for the horizontal scan. The vertical scan is easy. For example, with standard NTSC video you're only talking 60 fields (or 30 frames, if you forgo the interlace and just progressively scan whole the image) per second, so that's 60 trips (or 30 trips progressive) up and down each second, which is well within the limits of your standard galvo. The horizontal scan rate, on the other hand, is 15.7 Khz, which is pretty darn fast! (15,700 trips back and fourth each second) Thus they need the AOM for the horizontal scan.

Adam

[Astroguy]

Fred:

Nah, you only need one - for the horizontal scan. The vertical scan is easy. For example, with standard NTSC video you're only talking 60 fields (or 30 frames, if you forgo the interlace and just progressively scan whole the image) per second, so that's 60 trips (or 30 trips progressive) up and down each second, which is well within the limits of your standard galvo. The horizontal scan rate, on the other hand, is 15.7 Khz, which is pretty darn fast! (15,700 trips back and fourth each second) Thus they need the AOM for the horizontal scan.

Adam

Got it. Thanks, that makes sense now. How hard is it to sync to two to work together?

[LaserLover]

You can use 2 AOBD's one for Horiz and the other for vertical and never worry about a galvo going wanky on you since you won't have any moving parts (NEOS has done this and you end up with a very expensive laser tv projector). The best bet is to use a good high quality galvo like a Cambridge 6800 for the vertical. If you have schematic you can tap off the sysnc circuits in your video source and design some interface to convert the signal levels and logic required but it's doable for a Tech with experience and a bit of basic TV knowledge.
Mind you you would have monochrome and would have to have three of everything and good alignment + corrective optics to get full color (expensive but doable).

Rick

[liteglow]

wow there is so much for me to learn