Thingiverse
Simple Visible Light Monochromator
by KysonMuh
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Proof of concept for a basic visible light monochromator
White light from a basic 5mm LED shines onto a cheap replica transmission grating (1000 lines/mm), which projects the diffraction pattern through the aperture. Rotating the lid assembly and slit allows you to select specific wavelength regions.
Simple design but I was able to achieve ~5nm resolution after narrowing the exit slit with razor blades, although the intensity wasn't amazing. Tested the resolution on my DIY spectrophotometer (published on my Thingiverse profile)
White light from a basic 5mm LED shines onto a cheap replica transmission grating (1000 lines/mm), which projects the diffraction pattern through the aperture. Rotating the lid assembly and slit allows you to select specific wavelength regions.
Simple design but I was able to achieve ~5nm resolution after narrowing the exit slit with razor blades, although the intensity wasn't amazing. Tested the resolution on my DIY spectrophotometer (published on my Thingiverse profile)
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