My second RGB laser projector build

[c4r0]

I disassembled it from broken Shinp SL-7 laser.

[neutrino]

Glad to see you're progressing.

Have you thought of bleeding in a tiny amount of green with the 405, via a diode and a resistor divider?

It might just perk up the appearance of blue.

I don't want to hijack, but I was trying to work out to do this. As I only have a 405 at the mo. I was wondering how to 'fool' the software to produce a slightly better blue. it seems it can be done via hardware as per your post above.

Could you explain a little more on how this would be done please.

Thanks
Rich

[buffo]

Some controllers (including Pangolin models) allow you to tweak the color palette manually. So you select your pure "blue", and then add some green to it (since you blue is actually a deep violet). Also, the Pangolin color wizard (software tool) allows you to make a couple adjustments and the re-calculate the palette based on those adjustments, but with other controllers you may have to manually edit each and every color to get the effect you want. (Though if memory serves, I think Mamba Black had a color balance control that might do roughly the same thing... Been too long since I booted that software to remember!)

What software and controller are you running?

Adam

[c4r0]

Glad to see you're progressing.

Have you thought of bleeding in a tiny amount of green with the 405, via a diode and a resistor divider?

It might just perk up the appearance of blue.

Yep, I thought about it. Maybe I'll try to do it but actually I dont want to mess with the original driver for the green module. To do it I'd have to put one resistor in series with the laser diode and another one paralleled to that LD+resistor pair. That parallel resistor should be switched 'on' by a transistor (thus lowering the actual LD current) when blue laser is turned on. Also blue TTL signal should turn on the green laser too. Is that what you meant? Another way to do it is building second LD driver (lower current) connected to the LD in parallel with the original one, but probably there will be needed a ground separation between these two drivers. I'm considering trying to do what you said, but after the projector is finished

~buffo
First of all, I'm using lasers with TTL inputs, not analog inputs Then it's not possible to add some green to blue only by software configuration. I'm using Popelscan RGB interface.

[neutrino]

Some controllers (including Pangolin models) allow you to tweak the color palette manually. So you select your pure "blue", and then add some green to it (since you blue is actually a deep violet). Also, the Pangolin color wizard (software tool) allows you to make a couple adjustments and the re-calculate the palette based on those adjustments, but with other controllers you may have to manually edit each and every color to get the effect you want. (Though if memory serves, I think Mamba Black had a color balance control that might do roughly the same thing... Been too long since I booted that software to remember!)

What software and controller are you running?

Adam

Runnig FB3. I've started a new thread as to not hijack this one.

http://www.photonlexicon.com/forums/...229#post132229

Thanks
Rich

[ElektroFreak]

I disassembled it from broken Shinp SL-7 laser.

Nice! I've seen those exact modules (150mW and 100mW each with TTL) on ebay for very reasonable prices. $99US and $88US respectively.. I'm curious if they are any good. How has your experience been so far?

[c4r0]

Well, so far it works :P Output power is higher than declared 100mW. It came out from my measures that it's about 120mW of green + 30-40 mW of IR. The longest time I've been running it continuously was about 30min and I haven't noticed any instability. The only other DPSS laser with such power I've ever played with is coherent compass 315m-100 (which is something totally different) so actually I can't compare this module with any other...

[ElektroFreak]

Yeah.. the Compass isn't even on the same planet as that laser in terms of quality, but it doesn't have modulation capability so it wouldn't be suited well for what you're doing there.

[c4r0]

Hello!
I just put an article about the first version of this laser projector (before aluminum case) on my website. If you guys would like to see it, here you go: http://c4r0.skrzynka.org/_hv/index.p...rs/RGB2&lang=1 I would be grateful if someone who have read that could point out the most gross bugs in my english (I don't want all of them pointed out because it would be all that text probably :P )