Comments on: 7 color hand held laser projector

By: bsa11

bsa11 — Sat, 25 Jul 2009 17:10:49 +0000

Can one purchase this laser from caleb kraft? Or atleast communicate about this amazing laser?

By: natrix

natrix — Thu, 08 Jan 2009 07:24:30 +0000

maybe some of the fibre channel stuff would be a good place to look for a rough pwm design, i’d imagine a commercial product would need to be able to switch really fast.

By: Chris

Chris — Tue, 06 Jan 2009 17:06:40 +0000

rog8811:

Nice Setup and nice job on the alignment. It looks really good.

For everyone else:

Hey! You can modulate them you just need different laser diode drivers.

The white beam is still coherent … just 3 different coherent beams in 1 space. Your eye mixes the colors and shows you white.

If you used PWM you would need to use a really fast modulation frequency and/or maybe a DC filter on the output… as soon as you move the beam around you would get dots instead of lines.

You can buy the PS3 Laser Sleds as a replacement part so you don’t have to take apart your PS3.

By: Grovenstien

Grovenstien — Tue, 06 Jan 2009 12:28:13 +0000

I like this alot!

By: happypinguin

happypinguin — Tue, 06 Jan 2009 09:21:47 +0000

@EllisGL

No, you can’t. Like I said above, the
white LASER beam is not coherent.
You would need a phase modulator to
correct the phase of the three beams.

By: natrix

natrix — Tue, 06 Jan 2009 08:28:01 +0000

I don’t know much about laser diodes, but can they be hooked to a PWM? If they can, couldn’t you get WAY more colors with that setup?

By: EllisGL

EllisGL — Tue, 06 Jan 2009 00:12:43 +0000

I wonder if you could use this for DIY Color Holography….

By: spacewalker

spacewalker — Mon, 05 Jan 2009 23:11:06 +0000

Impressive Young padwan. Your skills are getting better every day.

By: mike

mike — Mon, 05 Jan 2009 21:29:12 +0000

That is really cool, ’scept I kind of think it might void the warranty on the ps3 to do that.

By: rog8811

rog8811 — Mon, 05 Jan 2009 20:15:05 +0000

:)I only noticed the date after constructing the web pages, the laser and the website all put together in December 2008.

Regards rog8811

By: Midnight

Midnight — Mon, 05 Jan 2009 20:08:13 +0000

Very nice :P

I like the creativity of combining “salvaged” electronics.

Again… Very nice.

By: happypinguin

happypinguin — Mon, 05 Jan 2009 19:45:45 +0000

It is nice, but not truly a LASER.

LASER is by definition a coherent
source of collimated light.
While the light is still collimated
after mixing the three beams, it won’t
be coherent.

Anyway, the white beam is beautiful and
I doubt he would like to use that for
some serious applications.
So, nice job! The three beams looks to
be very well aligned, I must admit it
is difficult to do that with that size
constraints. I have to use expensive
lab optics and supports to do the same
thing.

By: rog8811

rog8811 — Mon, 05 Jan 2009 19:39:45 +0000

Wow, thanks for taking this up :) If you want any further info I will be pleased to answer any questions.

Regards rog8811

By: Bobz

Bobz — Mon, 05 Jan 2009 19:33:34 +0000

COLOUR > COLOR

By: Chris

Chris — Mon, 05 Jan 2009 18:46:41 +0000

Me Likey… That is a really nice compact design..