spectroscopy
spectroscopy


Author Comment Last activity Moderation
stoft "Observation of some basic system parameters will help define the limits. 1) A single stable source (Solux and CFL) plus the PLab-class spectromete..." | Read more » about 5 years ago
stoft "With non steady-state sources, measurement error results from asynchronous data sampling. The 'fix' is either long integration time (assuming the s..." | Read more » about 5 years ago
jenjimah "Sure I'll post a question about it! After stewing on it a while, I don't think it should be a huge issue in most relevant contexts, (esp. for other..." | Read more » about 5 years ago
jenjimah "Thanks! It looks like khufkens predicted the response from >700 as the data was not yet available. If you look at the spectrum published by Sony..." | Read more » about 5 years ago
jenjimah " Great fodder for thinking about. 1) Agreed, having an individual light measurement per plant has advantages in certain scenarios. I guess it comes..." | Read more » about 5 years ago
MaggPi " This may be OBE but Hufkens has posted files of the PI response curves: https://khufkens.github.io/pi-camera-response-curves/ which were also r..." | Read more » about 5 years ago
stoft "Ok, the project concepts are taking shape which always prompts more thoughts. 1) By 2D mapping the light spectrum and relative intensity, you will..." | Read more » about 5 years ago
warren "Hi! I think the question of rolling shutter might deserve it's own question posted, to really dig into - it's a great question! One thought I had w..." | Read more » about 5 years ago
jenjimah "I was just reading on the pi website about the rolling shutter and I was wrong about the global shutter (it said only cameras with physical shutter..." | Read more » about 5 years ago
jenjimah "So I was reading about minimum exposure time of the Pi cameras and learned that it uses something called a "rolling shutter", which means it reads ..." | Read more » about 5 years ago
jenjimah " Yes that's exactly what I intend to do with the sun. Given sensor stability, and no shifts or changes in the spectrometer's build, calibration wou..." | Read more » about 5 years ago
stoft "A few more thoughts... On absolute 'average' intensity - You could use a Solux source (at fixed distance and known orientation) as a transfer stan..." | Read more » about 5 years ago
stoft " Ah, I've seen the curve on the web but it was not attributed to the specific sensor. It's helpful to now have that information. It looks like the ..." | Read more » about 5 years ago
jenjimah " Hi Dave, I just heard back from Sony regarding the IMX219 Sensor response. Here's the pdf and a screenshot: IMX219_Spectrum.pdf Although it doe..." | Read more » about 5 years ago
stoft " Jasmin, glad my previous notes were helpful. I did find one plot for the IMX219, but it was not from Sony and only covered to 700nm. The IMX265 c..." | Read more » about 5 years ago
jenjimah " Hi Dave, I looked at some of your posts before writing this one, actually! Your work is super helpful. I also couldn't find IR data from the Sony..." | Read more » about 5 years ago
stoft "Interesting project. I did not readily find spectral response curves from Sony on the IMX219 sensor though others in that family of devices appear..." | Read more » about 5 years ago
jenjimah "Hi Warren, thanks! I'll definitely try to document my process well as it comes along. I have a lot of motivation to get this going because I want t..." | Read more » about 5 years ago
warren " This is really cool! We'd love to see build photos as you go. We're also really interested in lighting setups and would love to see more documenta..." | Read more » about 5 years ago
midol "some PMS5003 distributors specify that Mie scattering is used " | Read more » about 5 years ago
arun " hi!! " | Read more » about 5 years ago
Ag8n " Just realize, these methods are far from being implemented. The mercury one is " proof of concept", which means it still needs troubleshot, valid..." | Read more » over 5 years ago
bryanchua "Thanks for the feedback @Ag8n ! We used FTIR because we saw that people have made DIY FTIR spectrometers and we also read these articles where FTI..." | Read more » over 5 years ago
Ag8n " I've never seen FTIR used for mercury detrmination. Usually, that is a variation of AA. The instrument set up you show is for transmission. Pro..." | Read more » over 5 years ago