Hi all,
I'm after a ruled diffraction grating block of approx 30mm x 30mm sizing with 600 lines/mm. I'm looking at putting together a littrow spectroscope. Have been in discussion with Merlin66 and am looking at doing something similar to Ken's efforts.
If anyone out there has one available, pls pm me. I'm not looking for a freebie, so pls include a sell price.
cheers
Mark
