MISHA imaging system fun

[Andy Perrin]

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. 

[Lou Jost]

What lens would that Schneider lens be?

[Andy Perrin]

Most likely one of these:

https://www.edmundoptics.com/f/schneider-compact-vis-nir-lenses/12743/

[Andrea B.]

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.

[Andy Perrin]

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?