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The box looks nice. Could you give us a view of the inside?

What is the value of L1?

That's great news. Would you mind sharing your constant resistance design?

It looks like it is an 808 nm pumping a OPS to 1060 nm then frequency doubling through a PPLN to 630 nm.

A little more light on the subject:
https://www.researchgate.net/publicatio ... our_pocket

Looks good!
What are the actuating mechanisms of the shutters? What Voltages are you using for the green laser and the heater? I'm having some problems getting my green going. What temperature are you setting with the Peltier?
Thanks

I have never refrigerated any films or plates.

I routinely develop Ultimate plates a day or more after exposure. I had one that I developed eight months later.

So you're connecting the 3 Volt batteries and rheostat from the LED assembly to the heater leads, right?

In the Wiki you can find "John Klayer"s Spatial Filter Plan".
It's simple and very easy to use.