February 1st, 2004

origin of sinful devotion

infrared spectrum

I have been hoping to perform a test of my camera's actual sensitivity to infrared light- trying to determine what is the actual response to various frequencies of light. I have been concerned that using the Hoya R72 filter, since a small amount of red is passed through the filter I might be fooling myself into believing what I was observing was actually infrared. So, I performed a test: I obtained a bag of prisms and some diffraction gratings from Edmunds Scientific. Collapse )
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