Beyond the Black Rainbow: Using Booleans to Photograph IR Rainbows!
summary
Claim: three-channel infrared color is possible by combining multiple IR-pass exposures and Boolean subtraction. Setup uses a camera with hot mirror removed, three consumer IR-pass filters (760–1100 nm, 850–1100 nm, 960–1100 nm), static scene lighting (Xenon prism rainbow), and Python to average channels, subtract matrices, and write a TIFF with the three resulting bands as RGB. Result: narrow, separated IR stripes appear, a usable thimble rig workflow that yields colored IR rainbows and altered images of a raccoon pineapple and orchid.
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chapters (7)
- 0:00Infrared rainbow intro
- 1:54Human color perception limits
- 3:17Camera sensors and IR spectrum
- 5:43Challenges with standard IR filters
- 7:08Multiple IR filters for spectrums
- 8:30Mathematical IR rainbow reconstruction
- 10:18Results and applications
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