Not really a photography question but I know there's a few optical wizards about so thought I'd post away . I'm working on a system that uses a 850 +/- 10 nm infrared photodiode and what I'd like is an easy way to bench test the device. It'll be illuminated and if it worked in the visible range I'd use black, 50% grey and white cards to test it with, it doesn't have to be very precise just a way to take a few readings across the range of realistic readings, as opposed to putting in an enclosure or pointing at a mirror.
Because the filters on infrared remote controls are visibily dark and farily transparent to IR but designed to block visible light I know the rules of play are quite a bit different at that wavelength. I wondered if anyone had ideas on materials to use or maybe some reference to a database of how reflective various materials are at various wavelengths?
Because the filters on infrared remote controls are visibily dark and farily transparent to IR but designed to block visible light I know the rules of play are quite a bit different at that wavelength. I wondered if anyone had ideas on materials to use or maybe some reference to a database of how reflective various materials are at various wavelengths?