| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| evjam | "This running as the first prototype, room for expansion of data collection and projections; e.g. opportunity for commercial prospects, such as fish..." | Read more » | over 6 years ago | |||
| evjam | "I would need help with the logistics - the high frequencies, GPS data and deep space stuff. In terms of design, user-trial, error, and amendments I..." | Read more » | over 6 years ago | |||
| evjam | "thanks Warren, heres ideas and draft..what do you think!? (: " | Read more » | over 6 years ago | |||
| warren | "Hello! This is an interesting idea -- I'd love to see it fleshed out a bit more. We do need user experience help! Maybe you have some sketches, wi..." | Read more » | over 6 years ago | |||
| stoft | "Since you appear to have verified all the individual elements, the solution must be that your overhead "fluorescent" ceiling lights are not the typ..." | Read more » | almost 9 years ago | |||
| smurpau | "Yeah, the webcam itself gives a good image and is focused. Moving the diffraction grating from 60 degrees to 45 degrees on top of the webcam gave t..." | Read more » | almost 9 years ago | |||
| stoft | "Ok, still a mystery; but I'll bet it's something simple that's overlooked. Let's double-check the obvious. In room light, the webcam by itself shou..." | Read more » | almost 9 years ago | |||
| smurpau | "Welp, still no luck, although the purple tint does appear to reduce the clipping (presumably just by absorbing some of the incident light) " | Read more » | almost 9 years ago | |||
| smurpau | "You know what, you're right. I don't see anything reflected from either side through the ethanol-washed piece, but I do through the original purple..." | Read more » | almost 9 years ago | |||
| stoft | "Ok, it was just a reflection in the earlier photo. Just good to check. Could there be any issue with the DVD as a diffraction grating having been a..." | Read more » | almost 9 years ago | |||
| smurpau | "Is this the paper holder you mean? I can't see any real gap from the front or back. I tried the spectrometer with the slit reversed as well (I'll t..." | Read more » | almost 9 years ago | |||
| stoft | "Quick question .... in your photo above (of the 0.4mm slit) it looks like there is a gap between the slit film and the paper holder for that film. ..." | Read more » | almost 9 years ago | |||
| smurpau | "Yes, this is the fluorescent tube 0.4mm slit diffraction grating and webcam As I said I've focused the webcam without the diffraction grating..." | Read more » | almost 9 years ago | |||
| warren | "I think the best plan may be to try focusing the webcam with the spec open and using a webcam program. It should be focused as it ships, actually. " | Read more » | almost 9 years ago | |||
| warren | "Hmm, I can't see any spectra on your profile at https://spectralworkbench.org/profile/smurpau Are you sure the earlier spectrum you posted was a f..." | Read more » | almost 9 years ago | |||
| smurpau | "Thanks for your reply @stoft. The light source is a fluorescent tube (there aren't any CFLs available here). I also have a green flashlight and my ..." | Read more » | almost 9 years ago | |||
| stoft | "Hmmm. Well, I'd agree the above image seems "fuzzy" but I'm also not clear as to what light the spectrum is representing. It also looks very over-e..." | Read more » | almost 9 years ago | |||
| smurpau | "I have the v3.0 kit but can't get a focused spectrum no matter how far I turn the focus ring clockwise or counter clockwise. The diffraction gratin..." | Read more » | almost 9 years ago | |||
| HalLasell | "This is an old thread, and this has probably been resolved. However, Matlab has tools which enable which support conversion of Matlab code to C co..." | Read more » | about 9 years ago | |||
| tmoravec | "the reason for the fast fallof at 600+ nm is IR filter on the CCD/CMOS chip of the camera. I am currently working on similar problem. I need to cal..." | Read more » | almost 11 years ago | |||
| warren | "I think if we do something with a few more lines, as you say, we can try it out. Say, 75-50-25-0-25-50-75, each band being about a 1/4" wide. If yo..." | Read more » | over 11 years ago | |||
| stoft | "Yes, I could print a couple sheets but it would be best to decide on the best pattern and density if you're looking to send something along the lin..." | Read more » | over 11 years ago | |||
| warren | "Aha! http://www.amazon.com/3M-3700-Color-Laser-Transparency/dp/B00004TS5M/ I'll order this now; maybe drying won't be a problem with a laser print..." | Read more » | over 11 years ago | |||
| warren | "I actually don't have an inkjet printer; would you be at all interested in printing a few sheets of this and mailing it to me? I could then cut it ..." | Read more » | over 11 years ago |