robk
Enlightened
I'm in the process of setting up a darkroom to develop glass holographic plates. They are red-sensitive, and you're supposed to use a green safelight. Well, I figured that the best green monochomatic light source would be an LS! I bought a green (I forget the nm)LS from Mark Hannah, mounted it on a heatsink in a box with a LM317 set for max current of 390mA. That way I can drive it with a variable voltage lab PS and never exceed 390mA, so I can dim it. My question to the group is, is it truly monochromatic? I can't have any red light in the room while processing the plates. If I catch a reflection of the green light off a CD (poor mans diffraction grating) I see a rainbow. Does this mean the LS is putting out more than one color? I didn't think it was possible.
Thanks!
Rob
Thanks!
Rob