Topic: I just ordered a new green laser!

[James]

What the hell..... I got some money so I finally broke down and ordered a decent analog modulated green laser!

It's rated at 700mW and I should have it in a few days. It's already in the USA!

So now I should have enough green and my white won't be pink!

James.   

[staroflaw]

Now then James. You just can't resist can you. lol


How you been mate? I have not had much time to work on the laser for over 6 months now.
Here are a few pix of what I have done so far.


Later bud. 

[James]

WOW! That's some really neat looking stuff!

Please describe what we are looking at!

It looks like you are running 4 different wavelengths and that you have incorporated the correction amps into the diode drivers.

[BlinkenLights]

i dont see a correction amp, all i see is 4 diode drivers...

[staroflaw]

They are diode drivers. (analog modulation) 1.5A

2-Red (PBS)
1-Green
1-Blue - 445nm
1-Violet - 405nm

Next I am working on a PSU and microprocessor controlled "Gain" to give me full control of each laser min-max power output using a atmega328 and digital pots.
I know I can adjust this in software but in stand alone mode a hardware approach is the best solution.
Plus I can lock all RGB channels to keep the optimum white balance at lower outputs.

Using a microprocessor also allows me to log temp and output (mA) and some error and fault control.

The current drivers I made are designed to adapt to the mods easily.

[James]

That's really nice!

I have red, green, blue and violet in my projector as well. I started out thinking I would write code to independently control the violet as a forth, discrete color, but I also wired my projector with a switch so that the violet could get it's signal from the blue channel.

So far, I haven't done a whole lot with that idea.

Still, it is fun to scan in pure violet onto glow-in-the-dark paper!

The green laser I just got is quite a bit brighter than the other colors and I adjusted it with the gain control of the green channel on the LaserBoy correction amp. The linearity is not exactly right, but once I got it adjusted down a little, it's not bad at all.

James.