Question: making a slit in spectrometer

by vafa |

What I want to do

making a simple and exact schemical spectroscopy

My attempt and results

I making the Box but I cant making simple adgustable slite

Why I'm interested

I like to use this instrument in analytical chemistry

thanks a lot

Alternatively, you can buy one from Edmund / Thor for ~250$. You can also get grating mirrors (reflective diffraction gratings) there for ~100$.