Grating Spectroscope

thingiverse

Although I listed this as a remix, this is actually not a remix but a redesign inspired by Luisman's spectroscope. Luisman has a nice design. I printed his design and found a couple of things that could be improved. It is easier to just redesign it. Firstly, I increased the size of the endplate/window. This spectroscope makes use of a 1000 lines/mm grating that you can purchase from Amazon or eBay. The most common one has a size of 2 in x 2 in. I made the plate 52mm x 52mm so the grating fits in without trimming. Secondly, I optimized the angle of the endplate a little bit. The original design used 45 degrees, but for a 1000 lines/mm grating, the optimized angle should be around 60 degrees. With this angle, the best practice to use the spectroscope is to point the slit to the light source while looking through the window in the direction perpendicular to the window, as I indicate in the photo. A fluorescence light would be a good start - you should easily see a few bright lines - red, orange, green, cyan, and blue. This angle also makes it very easy to take a picture with your phone. The spectroscope can be printed without support if you don't rotate the direction. The cap has 4 small buds to hold it in place. If you find it is too tight you can scale it up a little bit, like one or two percent. Print it in black for the best viewing experience.