| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| jhondue123456 | "https://www.google.com " | Read more » | 14 days ago | |||
| Luniversdelalicorne | "totally agree " | Read more » | almost 3 years ago | |||
| Ag8n | "A possible light source for a spectrometer--the light on the cell phone. But what is the spectrum like? I didn't know. Here is an answer from qu..." | Read more » | almost 3 years ago | |||
| Ag8n | "Look up didymium glass filters,PNB586 or BG20. That will be a start. Usually, if you find a good vendor, they will have a copy of the UV/Vis spec..." | Read more » | almost 3 years ago | |||
| Ag8n | "One of the alternate calibration methods, posted on a different thread, was to use photographic filters that were made of didymium. It sounds like..." | Read more » | almost 3 years ago | |||
| dcanprdn | "R G B colored low-price lasers are everywhere ??!!! Ebay, Aliexpress etc ADP " | Read more » | almost 3 years ago | |||
| dcanprdn | "Why not use low price R G B office laser pointers for visible light calibration ? ADP " | Read more » | almost 3 years ago | |||
| Ag8n | "Sorry, got a phone call. The same line listed for this spectrometer should be usable for the spectrum lab instrumenent. The lines are only listed..." | Read more » | about 3 years ago | |||
| Ag8n | "Checked on amazon. Found three spectrometers, similar in function to the spectrum lab. They are priced at $7, $9, and $37. The $37 is the best. I..." | Read more » | about 3 years ago | |||
| givemehits | "ok " | Read more » | about 3 years ago | |||
| amerikangold | "Correct ! " | Read more » | about 3 years ago | |||
| Ag8n | "Or of holmium chloride solution, for that matter. Probably the solution would work better, but there would be done handling issues. " | Read more » | about 3 years ago | |||
| Ag8n | "Thanks for the alternate source of didymium glass. Do you know of any less expensive sources of holmium oxide glass? Thank you. " | Read more » | about 3 years ago | |||
| david_uwi | "You've got to be careful with lasers. The visible lines are often not their main emission lines. For instance a green laser (532 nm) puts out more ..." | Read more » | about 3 years ago | |||
| socinova123 | "If you’re looking for the best social media management company then it is the best solution for you. which is well-known and trustworthy. " | Read more » | about 3 years ago | |||
| Ag8n | "I checked the pictures of the 3 lasers in one of the marketing shots. The red, green, and the violet laser all showed a laser warning tag with 405..." | Read more » | about 3 years ago | |||
| Ag8n | "Another option is a pack of three lasers marketed as kitty chase toys. They run about $20. Again, quality is an issue. The colors are listed as ..." | Read more » | about 3 years ago | |||
| Ag8n | "You want a sharp, distinct, and stable line for calibration. Which is why the lasers are sought after. They are also hard to find. Please check ..." | Read more » | about 3 years ago | |||
| Ag8n | "Amazon has tricolor, four lead, LEDs. So all of the different color LEDs are in the same package. I'm this case, they give off red, green and blue..." | Read more » | about 3 years ago | |||
| Ag8n | "Some of the early lamps for hplc detectors used mercury lamps, which could cover both visible and uv wavelengths- granted only specific ones. But ..." | Read more » | about 3 years ago | |||
| warren | "Hi! It's a good question. CFLs have multiple very strong and stable lines, so it's hard to find something like that. If we had infrared we might us..." | Read more » | about 3 years ago | |||
| Tomas0413 | "Quick update: The grating orientation might be the thing. I tried 4 * 2 = 8 combinations for the grating, and it didn't make any difference - in ..." | Read more » | over 5 years ago | |||
| Pushpaw | "Just tried it and it is important to note that what you will see is 3 dots once the laser beam has passed through the diffraction grating. One is w..." | Read more » | almost 6 years ago | |||
| Tomas0413 | "The grating orientation might be the thing. I somehow didn't think about it before. I do have a laser pointer, and when I tried a few weeks ago, I ..." | Read more » | almost 6 years ago |