| 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 » | almost 8 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 » | almost 8 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 » | almost 8 years ago | |||
| dhaffnersr | "Sounds good, the 3D printed prototype looks cool also! " | Read more » | almost 8 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 » | almost 8 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 » | almost 8 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 » | almost 8 years ago | |||
| dhaffnersr | "This is certainly a very ambitious undertaking. 70X70mm that would be pretty amazing. " | Read more » | almost 8 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 » | about 8 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 » | about 8 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 » | about 8 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 » | about 8 years ago | |||
| eustatic | "neat. a new role for green lasers? " | Read more » | over 8 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 8 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 8 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 8 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 8 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 8 years ago |