| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Vman | "Thank you so much for the idea on using heatshrink material as a material for making the slit. This is better than paper or cardboard because it di..." | Read more » | over 7 years ago | |||
| straylight | "wow, what a useful research note, thanks for taking the time to post it and explain what you did. Interesting to be able to compare the ocean opti..." | Read more » | about 12 years ago | |||
| cfastie | "That's a challenge if smartphone cameras are not very sensitive to low light. More tests are called for, but I think the cheap diffraction grating..." | Read more » | about 12 years ago | |||
| warren | "I think maybe you mean 0.2mm and 0.4mm, mathew? Good to know, both of you -- i'm getting the desktop kit slits cut today!! Thanks. " | Read more » | about 12 years ago | |||
| mathew | "Chris-- When I was doing the spectrometer tests I found that 2mm was too dim to reliably read the spectra with a cell phone camera and settled on 4..." | Read more » | about 12 years ago | |||
| warren | "For the short term, it will prompt you to take a photo, and will allow you to upload it. Once we start on the native app, it will work just like th..." | Read more » | about 12 years ago | |||
| cfastie | "Alex - That's an good point that some smart phones do HDR. To improve the chances of great results, users of the smart phone spectrometer could tak..." | Read more » | about 12 years ago | |||
| warren | "I'm very impressed that the foldable spectrometer can get such good resolution. Partially, of course, that's the DSLR, but I'm glad that folks with..." | Read more » | about 12 years ago | |||
| cavazos | "Chris Thanks for sharing your views. I believe the exposure issue can be fixed by using High Dynamic Range or HDR technique. I'm not a photography..." | Read more » | about 12 years ago | |||
| cfastie | "Hi Alex, I haven't experimented much with webcams yet, so I don't know the answer. I do know that a narrow slit is critical for precisely identif..." | Read more » | about 12 years ago | |||
| cavazos | "Hi Chris, In your opinion, what single item improves most the results of the spectrometer? Better camera? The grating? The spectrometer case? In o..." | Read more » | about 12 years ago |