Thanks for the link! I’ve been trying to figure out how to buy/make a Raman spectrometer for cheap (currently in a third world country too!). Have you built one

Thanks for the link! I’ve been trying to figure out how to buy/make a Raman spectrometer for cheap (currently in a third world country too!). Have you built one yet? I’m having trouble finding the lenses needed (mostly because of my lack of knowledge). Any chance you know what to use? Laser ($40): https://a.co/d/0wjNGBz https://a.co/d/0wjNGBz Diffraction grating ($12): https://a.co/d/6bpO8xm https://a.co/d/6bpO8xm Laser focusing lens: Not found Fluorescence collection lens: Not found Focusing lens: Not found Collimating lenses: Not found