| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| MrBumper | "Hi Chris, Thanks for the tip on dark material and your findings on grating orientation. The internet really is killing bricks and mortar retail, I ..." | Read more » | almost 10 years ago | |||
| cfastie | "...if the grooved side of the DVD diffraction grating is either facing towards or away from the camera... I experimented with that once, although I..." | Read more » | almost 10 years ago | |||
| mathew | "more technical details on the Sanm camera: Sensor: HM2050 CMOS sensor Pixels: 2mega (UXGA) Top resolution:1600*1200 Lens type: 1/5 inch EFL: 2.85mm..." | Read more » | over 10 years ago | |||
| stoft | "Ok, so the plots are absorption; which makes more sense. However, the Y axis is labeled "Intensity". It would be more clear to either plot relative..." | Read more » | over 10 years ago | |||
| ygzstc | "Dave - Thanks a lot for the insights...As you said, when I add oil sample, intensity decreases and since the plots above is the difference between ..." | Read more » | over 10 years ago | |||
| jeffh | "Very nice work. I checked the listing for the lamp, and if you are using the original bulb, it is a "warm white" with color temperature of 2700 deg..." | Read more » | over 10 years ago | |||
| stoft | "Nice experiment. As I recall, white LEDs have a significant 'bump' at about 430nm, a dip at 470nm and a broad peak about 600nm so I assume the 470 ..." | Read more » | over 10 years ago | |||
| liz | "Wow this is fantastic!!! I can't wait to try this method~! " | Read more » | over 10 years ago | |||
| ygzstc | "Jeff, I am sure it can be done. However, coding is not my strong suit :( I may help on theory and algorithm development though... Cfastie, you are..." | Read more » | over 10 years ago | |||
| cfastie | "This is excellent research. Do you think if I bought some "100% extra virgin olive oil" and sent you a sample, you could tell me if it was really 1..." | Read more » | over 10 years ago | |||
| warren | "Wow, this is spectacular -- thanks! I'm wondering if there's a way we could write a macro for Spectral Workbench to do this kind of analysis in rea..." | Read more » | over 10 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 | |||
| eustatic | "Grazie! " | Read more » | about 11 years ago | |||
| michelemariacaruso | "it's fantastic, i think that it is very useful " | Read more » | about 11 years ago | |||
| eustatic | "adding cardboard scrap to top flap: " | Read more » | about 11 years ago | |||
| eustatic | "Green Zip Tie construction Eustis / Kearney this is how green zip tie was made and is "aimed." following diagram for step 6 alignment--less tha..." | Read more » | about 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 | |||
| stoft | "Yes, I ink-jet printed on 'Grafix' transparency film (not the adhesive version)-- it's available on-line via Amazon. It's reasonably stiff in small..." | Read more » | over 11 years ago | |||
| warren | "Thinking about how to do this well... did you print on a laserprinter? Can you run transparency through one of those? Would inkjet work, or would i..." | Read more » | over 11 years ago | |||
| stoft | "I see your point. I just wonder about having only a single attenuation step which could make it difficult to find the best level; a case of too lit..." | Read more » | over 11 years ago | |||
| warren | "I actually think there's an advantage to stepped grading, because a) it's easier to pick out the pattern -- like a barcode -- vs. continuous chang..." | Read more » | over 11 years ago |