| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Ag8n | "If a source like the sun or an incandescent lamp is used, then maybe using a photographic bg20 filter as a standard would do. The spectrum they a..." | Read more » | over 3 years ago | |||
| Ag8n | "There is a closely related chemical recently added to the USP for uv/vis standardization. It is a solution of didymium. Some places also use a gl..." | Read more » | over 3 years ago | |||
| Ag8n | "https://youtu.be/u5tUmdWALn0 Hopefully, this link works to the video " | Read more » | over 3 years ago | |||
| Ag8n | "Of you take a look at commercial instruments, they will usually use holmium oxide or other holmium salts for calibration. Great. These salts are ..." | Read more » | over 3 years ago | |||
| Ag8n | "Found something.It's a YouTube post by chem_talk on neodymium. It's a long way from complete, but according to the post, this rare earth isn't rar..." | Read more » | over 3 years ago | |||
| mimiss | "Thank you for this idea! I have laser pointers in a few colors in my house that I can try out. On May 5, 2020, at 11:19 AM, notifications@publicla..." | Read more » | over 4 years ago | |||
| liz | "I think I used a red laser and a green laser to get the calibration to work at some point... " | Read more » | over 4 years ago | |||
| kgradow1 | "Could you use a laser pointer and still go through the same workflow with @cfastie's reference image? I'm not sure if the peaks would line up, th..." | Read more » | over 4 years ago | |||
| yp1080030 | "Note Work Computer CLICK HERE " | Read more » | almost 5 years ago | |||
| jevs | "I cannot find anything lower than 2700K, so I am going to order a 5W 2700K...hope it works out. " | Read more » | about 5 years ago | |||
| stoft | "Glad this note is helpful. Between using a "clean" CFL spectrum for wavelength calibration, a sharp narrow slit, performing a gain-correction and b..." | Read more » | almost 9 years ago | |||
| liz | "It's REALLY helpful to see your explanation of how daylight bulbs are enhanced in a way that affects the peaks we need to calibrate, so that we sho..." | Read more » | almost 9 years ago | |||
| dhaffnersr | "Hey Dave! Man this is great tech info, love it, the 23w cfl that I use is 1600 lumens, I can see by the graph data that I may try the 14w and see h..." | Read more » | almost 9 years ago | |||
| warren | "Hi, Cindy - can you link to your actual data on SWB? The average should be in the "ideal exposure range" but the important part for the 3 color ch..." | Read more » | almost 9 years ago | |||
| 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 | "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 | |||
| 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 | " " | Read more » | about 9 years ago |