# diy-spectrometer diy-spectrometer

Author Comment Last activity Moderation
dhaffnersr "hey cristoforetti , I just wanted to give you some info on why you should be using the aluminum coated mirrors: Aluminum is also common used in m..." | Read more » about 6 years ago
cristoforetti "@stoft thank you very much for the clarification and suggestions. About 1) I am looking to use cars mirror, that should be front-surface mirrors. ..." | Read more » about 6 years ago
stoft "@cristoforetti, the camera focal distance is based on using a slit to simulate collimated light -- non-collimated light gives multiple diffraction ..." | Read more » about 6 years ago
dhaffnersr "Sounds good, the 3D printed prototype looks cool also! " | Read more » about 6 years ago
cristoforetti "Thanks dhaffnersr, that dimension shouldn't be a problem. Probably I will need to modify a bit the design, shifting the optics 5mm to the left sho..." | Read more » about 6 years ago
dhaffnersr "hey cristoforetti, my web cam's dimension's are 32mm X 32mm, so your project is pretty small I hope it will work, as far as the mirrors, if i were..." | Read more » about 6 years ago
cristoforetti "@dhaffnersr: assuming that the angles are right I think that it will be crucial to have good mirrors reflecting on a wide range of wavelengths with..." | Read more » about 6 years ago
dhaffnersr "This is certainly a very ambitious undertaking. 70X70mm that would be pretty amazing. " | Read more » about 6 years ago
emontoya57 "Dear David, I believe that in principle the back-scattering configuration should work fine, maybe except because it implies the lose of half of the..." | Read more » over 6 years ago
david_uwi "Thanks for the detailed explanation. I've seen that back scatter is a popular cofiguration what do you think? you are getting the same axis as tran..." | Read more » over 6 years ago
emontoya57 "Dear David, At the begining we also tried the right angle geometry but we only got spectra of very weak intensity, even after five or ten minutes e..." | Read more » over 6 years ago
david_uwi "I am going to attempt a Raman spectrometer. As I am in the design stages I was wondering why you chose "transmission" I am tempted to monitor at ri..." | Read more » over 6 years ago
eustatic "neat. a new role for green lasers? " | Read more » over 6 years ago
emontoya57 "Hi Warren, SERDS means Shifted Excitation Raman Difference Spectroscopy. A good open access article on the subject is available at: http://downloa..." | Read more » over 6 years ago
emontoya57 "Yes Warren, and the cheap ones (OD 4) have a FWHM of aobut 3 nm, centered at the laser line. Fluorescence is always unwanted and Raman signals are ..." | Read more » over 6 years ago
warren "Thanks! the cleaning filters, then, are very narrow-pass filters to ensure the green input laser is only the 532nm light? And is Raman mostly/alwa..." | Read more » over 6 years ago
emontoya57 "Hi Warren, I am really trying to make the device sa cheap as possible. I my first trials Ia used a REBEL T3 with its default lens (about US$400 in..." | Read more » over 6 years ago warren "Wow, very exciting. I see the build cost was$3000, but much of that is the nice camera and lens; the long-pass Raman edge filter, though, costs \$4..." | Read more » over 6 years ago