| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| dhaffnersr | "Hey Jeff! Sure I'd be happy to test any LEDs you want to send. I do want to throw an idea your way, I think using the higher wavelength LEDs are st..." | Read more » | about 8 years ago | |||
| aldehyde | "@cfastie I use of Mobius infragam cam (red filter) in Grow Chamber. Light -CFL. Received of infrared image Fig 1 and Fig 2. - after processing in ..." | Read more » | about 8 years ago | |||
| stoft | "Sure ... what's the LED's packaging style/type? SMD, leaded, ...? " | Read more » | about 8 years ago | |||
| cfastie | "I am not sure what your question is. I assume the red LEDs emit some NIR, but maybe not very much. With only red and blue LEDs, the amount of NIR r..." | Read more » | about 8 years ago | |||
| warren | "@dhaffnersr and @stoft, if you'd like I could send you the lower-wavelength LEDs as well for comparison testing? " | Read more » | about 8 years ago | |||
| warren | "@briandegger @jeffh - thanks for the tips on LED sourcing! Thought you'd enjoy seeing this. " | Read more » | about 8 years ago | |||
| JohnsonC | "@cfastie Hi I just have one more quick question while designing my next experiment. If I substitute the IR LEDs with red LEDs in my chamber when I ..." | Read more » | about 8 years ago | |||
| stoft | "BTW .... the comments about LED 'voltage' perspective do not seem inline with LED parameters. With LEDs, it's not the voltage, it's the current you..." | Read more » | about 8 years ago | |||
| warren | "Thanks, Dave, good to know. I'd sort of imagine it's a monochromator, like a reverse-spectrometer, using masking and a diffraction grating to gener..." | Read more » | about 8 years ago | |||
| stoft | "Note: Their UV source was a PTI LS-100 fluorescence spectrophotometer -- no longer sold. From a google books print, it sounds like a variable-wavel..." | Read more » | about 8 years ago | |||
| warren | "Ah, thanks for the download tip. OK, that's really interesting to see that lower excitation wavelengths create more variable/distinct emission spe..." | Read more » | about 8 years ago | |||
| stoft | "Note: The article can be downloaded w/o signing up using the 'Download Full Text' button at the upper right of the image frame on the web page. Fr..." | Read more » | about 8 years ago | |||
| warren | "Another thing that 1995 paper could tell us is why they chose 30nm as the offset to discard above the excitation wavelength, and more about the lig..." | Read more » | about 8 years ago | |||
| warren | "I think @gretchengehrke is back from GOSH in Switzerland, so maybe she can chime in, but I wanted to question specifically @ethanbass's point: the..." | Read more » | about 8 years ago | |||
| JohnsonC | "@cfastie I will reflect on what you have said for my next experiments, thanks for your help! " | Read more » | about 8 years ago | |||
| cfastie | "Oh, that's great to be able to disable AWB. I don't really know what manual setting would be best for your use. If you are going to be swapping f..." | Read more » | about 8 years ago | |||
| JohnsonC | "@cfastie - That is really interesting to hear and thanks for the link to Ned's note there. I actually have an installed GHI camera that currently a..." | Read more » | about 8 years ago | |||
| aldehyde | "@JohnsonC - i will thankful if you can share this program with the community. " | Read more » | about 8 years ago | |||
| cfastie | "Hi JohnsonC, That is a very intriguing chamber you have. Being able to control the spectral quality of the lighting makes some interesting things ..." | Read more » | about 8 years ago | |||
| JohnsonC | "@aldehyde - It's just a python-made program that basically looks at a pixel of an image based on location (X pixel width, Y pixel height). As far a..." | Read more » | about 8 years ago | |||
| aldehyde | "Hi, tell me please what kind of tool you use for analyze each pixel of a NDVI image? Thanks! " | Read more » | about 8 years ago | |||
| warren | "Gretchen is a chemist, so I thought she could shed some light on our questions about overlap and shorter wavelength LEDs. " | Read more » | about 8 years ago | |||
| warren | "@gretchengehrke, can you help us w excitation emission wavelength questions? " | Read more » | about 8 years ago | |||
| ethanbass | "One more thing to consider is that our DVD diffraction gratings would probably filter out most of the UV light below about 390 nm, even if we had a..." | Read more » | about 8 years ago |