| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| stevie | "@Cindy_ExCites :) This was awesome. I'm writing a workshop on calibration and scanning and this was Super helpful :). Any chance you've moved on to..." | Read more » | about 9 years ago | |||
| mathew | "I'm trying to figure out what this flat spot is, its just soo flat! I associate it with a blow out. Digging in to the spectra themselves on your ..." | Read more » | about 9 years ago | |||
| cindy_excites | "Hi @mathew! So you mean that in all the scans above where I see the intense blue channel had overexposure? As in the post https://publiclab.org/wik..." | Read more » | about 9 years ago | |||
| stevie | "Cindy this is awesome :) I'm working on a workshop where participants will need to calibrate. This material is really helpful! Thanks for posting! " | Read more » | about 9 years ago | |||
| mathew | "the crude looks really clipped-- I know there's a dip in the middle but it is really topping out. " | Read more » | about 9 years ago | |||
| warren | "Thanks for your feedback! " | Read more » | about 9 years ago | |||
| warren | "I don't believe those are clipped - I increased the exposure until it just barely touched the top, but did not depress or deform the top of the cur..." | Read more » | about 9 years ago | |||
| mathew | "the 80W-90 looks a bit clipped in the blue: https://spectralworkbench.org/spectrums/55075 the crude is substantially clipped in the blue: https:..." | Read more » | about 9 years ago | |||
| mathew | "Cindy the flat spots on your spectra are the blown out blue channel: https://publiclab.org/notes/mathew/09-23-2014/graded-oils-using-uv-fluorescenc..." | Read more » | about 9 years ago | |||
| warren | "These look good too, and come with a spectrum datasheet: http://www.ledgroupbuy.com/solderless-true-violet-led-405nm/ " | Read more » | about 9 years ago | |||
| warren | "Powered on one of these, with a dial: http://www.watterott.com/de/Wattuino-Nanite85?x56e76=f63b1cee028854c06b93338f2945a806 " | Read more » | about 9 years ago | |||
| warren | "Here's the big list of UV LEDs below 405 nm " | Read more » | about 9 years ago | |||
| warren | "Crap, those are only in quantities of 400+ or 1000+. I'll keep looking. " | Read more » | about 9 years ago | |||
| warren | "@tonyc @ygstcu - looking at higher powered LEDs, I've found: ~$4.40: http://www.digikey.com/product-detail/en/VLMU3500-385-060/VLMU3500-385-060TR-..." | Read more » | about 9 years ago | |||
| semitones | "@warren raman scattering is usually a very weak effect, and not easily seen. The stokes and anti stokes lines are very small compared to the main f..." | Read more » | about 9 years ago | |||
| zev | "fantastic work! " | Read more » | about 9 years ago | |||
| cindy_excites | "Yes, I can post a picture of two cuvettes when I get back to the UK (after Dec. 8th). And yes, I'd like to learn more about the Raman scattering. A..." | Read more » | about 9 years ago | |||
| warren | "Hi, Cindy - so, any of the ones where you just have a sharp spike around 405 nm just mean that there was not any fluorescence, or perhaps just none..." | Read more » | about 9 years ago | |||
| warren | "Great, thanks for the feedback -- I added some of your notes to @tonyc's note on a redesign of the camera mounting: http://publiclab.org/notes/tony..." | Read more » | about 9 years ago | |||
| warren | "I love the lego hack! Maybe we should make one entirely of lego. They're very precise. @Guillaume123 - if I understand correctly, Cindy said it wo..." | Read more » | about 9 years ago | |||
| warren | " " | Read more » | about 9 years ago | |||
| warren | "Huh, did your diffuser make it easier to get bright spectra? Why did you choose to use one? The red light bulb is an experimental "fluorescent lig..." | Read more » | about 9 years ago | |||
| warren | "Hi, Cindy - wow, you had spectacularly well-lit scans! Your laser must be quite powerful, or your camera especially sensitive. I wonder what accoun..." | Read more » | about 9 years ago | |||
| Guillaume123 | "I had the same problem of ribbed cuvettes. I found some cuvettes that do not have ribs and so I use those all the time now. " | Read more » | about 9 years ago |