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slit
slit


Author Comment Last activity Moderation
rebornteam0107 "Now a days there are so many people who are suffering from Knee Pain. This problem is most common in old age people. According to a survey, Cities ..." | Read more » over 2 years ago
ananyo2012 "Really a nice way to create a slit ! @warren Is it possible to adjust the slit in the same sheet as the spectrometer? The dimensions are pretty sma..." | Read more » over 2 years ago
warren ":+1: " | Read more » about 4 years ago
CBradley "@warren hey, thanks for the reply. I haven't really finished tinkering with the spectrometer yet but I will try to make some simple slits with tape..." | Read more » about 4 years ago
warren "Hi @CBradley - i think it's a good idea, yes! If you have a specific beginning and end size and are willing to share your work, we can probably get..." | Read more » about 4 years ago
CBradley "@warren Hi, I wanted to ask if you have encountered collimation slits that were not perfectly parallel (i.e. in a slight V shape tapering to close)..." | Read more » about 4 years ago
asnow "Thank you @warren ! " | Read more » about 4 years ago
warren "@asnow - here's some for 0.09mm ! spectrometer-slits-letter-0.09.pdf spectrometer-slits-letter-0.09.svg " | Read more » about 4 years ago
warren "And here are the ones we've reformatted for efficient printing at letter size! spectrometer-slits-letter-0.18.pdf spectrometer-slits-letter-0.18..." | Read more » about 4 years ago
warren "I believe this is the 2016 full PDF we printed from -- i did a new layout more recently that was just for one size, but this is the full-sized shee..." | Read more » over 4 years ago
warren "Some good notes on this over the years: https://publiclab.org/notes/cfastie/1-21-2013/spectrometer-image-quality https://publiclab.org/notes/warr..." | Read more » over 4 years ago
warren "We currently sell this pack: https://publiclab.myshopify.com/collections/spectrometry/products/acetate-slit-bundle With 0.09mm, 0.12mm. 0.15mm, an..." | Read more » over 4 years ago
zengirl2 "Yes, this seems to be an easy solution :) " | Read more » over 4 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 » over 6 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 » over 6 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 » over 6 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 » over 6 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 » over 6 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 » over 6 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 » over 6 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 » over 6 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 » over 6 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 » over 6 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 » over 6 years ago