sunlight
sunlight


Author Comment Last activity Moderation
stef "Further to my previous replies, it may be possible to view the sun disk attenuated with the filters used by welders to view their work. I have not ..." | Read more » almost 5 years ago
Metamer "I, too am trying to get spectral data of sun/sunsets. Would be interested to hear what you've learned " | Read more » almost 5 years ago
stef "What I was alluding to is that with all of the filter attenuation, the cmos sensor was still overloaded. This can be seen in the spectra submitted..." | Read more » about 5 years ago
Ag8n "There are two approaches to this, the hardware and software. Sounds like you took care of the hardware end very well. Can you think of any softwa..." | Read more » about 5 years ago
stef "I have used photographic neutral density filters and have not been able to view the sun directly using the spec3 highly modified device. The attenu..." | Read more » about 5 years ago
Ag8n "Only one suggestion then. Sunlight can be strong. As a safety measure, partially block the sun and work your way up to full exposure. Might not ..." | Read more » about 5 years ago
jsbonillam "I am going to make and analyse the graphs with the wavelength and absorption. " | Read more » about 5 years ago
Ag8n "Please forgive the question, but what lines are you using and what method of analysis? Thank you for the information. " | Read more » about 5 years ago
warren "Oh, i don't know, but it looks very cool! " | Read more » about 5 years ago
jsbonillam "@warren The camera will be just part of the spectrometer. I am still considering whether to use LDRs (light depending resistors), as here http://ww..." | Read more » about 5 years ago
warren "How would you set up the spectrometer next to the other equipment, or the tracker? Are you using a raspberry pi camera as-is, as well, or just as p..." | Read more » about 5 years ago
warren "I think the Lego spectrometer's suitability for this is an open question, but the Raspberry Pi Camera v2 is very low noise and could be worth testi..." | Read more » about 5 years ago
stoft "Jeff, I have doubts about "current bleeding" between the quantum wells as they are isolated from each other with silicon and the conversion to data..." | Read more » almost 7 years ago
viechdokter "Yeah, thanx for the tags. I will try to add them to my next notes. But feel free to add any tags you find helpful. " | Read more » almost 7 years ago
warren "Also, it may be helpful to add some common tags like "spectrometer,overexposure" to your posts, which I've been trying to help do too. This will ho..." | Read more » almost 7 years ago
warren "I also think that when a blue pixel is extremely overexposed, neighboring pixels may be triggered, either by current on the sensor chip itself or p..." | Read more » almost 7 years ago
warren "Hi, thanks for posting! One thing I've wondered about is whether different exposures -- that are not clipping/overexposed but are different overall..." | Read more » almost 7 years ago
stoft "Interesting observations. My guess is that IF the camera's sensor responded in a purely linear fashion, the over exposure would be white as you'd e..." | Read more » almost 7 years ago
viechdokter "Hi Chris, you are right, the settings are important too. I absolutely forgot to mention them. Here is a (translated) snapshot of the settings: ..." | Read more » almost 7 years ago
cfastie "Hi viechdokter, These are great observations. They reveal important features of spectra created using consumer cameras as the detector. It's real..." | Read more » almost 7 years ago
viechdokter "Okay, now I understand. Thanx. " | Read more » almost 7 years ago
warren "Hi, I think the glass in the camera lens and the sensor limitations may prevent much UV, even without a window. When we use a laser, we're mostly ..." | Read more » almost 7 years ago
viechdokter "Okay, my sunlight did not show much UV because I let it shine through a glass window. Next time I will try without the glass. (Waiting for the nex..." | Read more » almost 7 years ago
dhaffnersr "I am so glad that you asked that question! I use 2 types of cuvettes, 1) Quartz - they have neutral UV absorption, so it passes right on through wi..." | Read more » almost 7 years ago