Apparently the organic dyes used in a Bayer matrix are transparent in the near IR. Does anyone have or can point me to data on this? I'm primarily interested in the range between 650nm to 1000nm.
Bayer matrix transparency
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Here's more than you'll even want to know I think.
https://www.researchgate.net/figure/a-Conventional-camera-system-based-on-a-color-filter-array-CFA-image-sensor-with-the_fig1_303356870
https://www.researchgate.net/figure/a-Conventional-camera-system-based-on-a-color-filter-array-CFA-image-sensor-with-the_fig1_303356870
That's the reason why cameras using IR for night vision switch to black and white. You can't white balance anymore since IR excites all 3 channels more or less the same way.
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Thanks for the paper Rick, I'll take a look at that.
D. Jung - I'm not worried about white balance, just how a color sensor responds to near IR.
D. Jung - I'm not worried about white balance, just how a color sensor responds to near IR.
Data on that isnt really neccessary, just look at some of my images!!!
(I would like to know how transparent it is too.)
(I would like to know how transparent it is too.)
That's exactly what I want to do. I'm close to downtown Tulsa and primarily shoot OSC dual band under bortle 8. I would like to add near IR that I can use as a third color channel and also to hopefully make a few broadband targets worth going after.
Once you get over 700 things start to look very monochrome. The NIR will act similarly to luminance in a way because it washes out your colour but adds detail. I find it particularly good for shooting galaxies from the city. It will provide great contrast, but you'll have to pump the colour to compensate for the strong IR that washes it out.
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