Andy Perrin Posted October 7, 2023 Share Posted October 7, 2023 My friend and some-time student Leah is a book conservator and she is also doing her PhD in color science. This week she and a fellow student are delivering a MISHA multispectral imaging system to the National Archives of Croatia. A pretty complete description of the system may be read here: https://diglib.eg.org/bitstream/handle/10.2312/gch20221231/095-098.pdf It’s LED-based with a computer program that automates the picture taking using the 16 LEDs, 12 in the visible range, 2 infrared (940nm and 850nm) and 2 ultraviolet (385nm and 365nm). The camera is a FLIR Flyback camera, and the lens is a Schneider NIR/VIS apochromatic lens. Link to comment
Lou Jost Posted October 8, 2023 Share Posted October 8, 2023 What lens would that Schneider lens be? Link to comment
Andy Perrin Posted October 8, 2023 Author Share Posted October 8, 2023 Most likely one of these: https://www.edmundoptics.com/f/schneider-compact-vis-nir-lenses/12743/ Link to comment
Andrea B. Posted October 31, 2023 Share Posted October 31, 2023 I think that this system would be so cool to use! Yes, I am a nerd. One question though: Does that camera and Schneider lens work well for the UV bands? The lens specs mention 400-1000nm spectral range. Link to comment
Andy Perrin Posted November 1, 2023 Author Share Posted November 1, 2023 I'm sure the camera is fine since it's a monochrome Sony sensor camera that doesn't come with any filtration. The lens probably has focal shift in UV based on the complaints I saw in the paper. It's certainly not optimal there, but since they wanted it to focus all the way across the spectrum it's not too awful for a general purpose lens I guess? Link to comment
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