JMC Posted October 5, 2020 Share Posted October 5, 2020 Here's an odd one for you all. Apparently these are designed for use by the military with car headlamps, and they are an IR long pass filter. The aim being to use them in combination with night vision goggles. They are big - 18.5cm diameter - and curved with a smooth side on what would be the outside of the lamp, and with the lens patterning on the inside. Here's what they look like. The paper packaging on one of them has what looks like a date stamp for 1966. When I measured the transmission spectra I just started to get the edge of the IR transmission. Unfortunately my spectrometer doesn't go any higher, but I'm guessing they are something like a 900nm long pass. Although they probably fit my Landrover Defender (they're not one for big design changes until the new 'Defender' that has just come out), I haven't quite bought myself a night vision setup yet. I bought them as they are the right size for my studio flash system so I could use them for long wavelength IR imaging. The transmission is a bit high up, but c'est la vie, for £25 delivered for the two of them from eBay I thought they were worth a gamble. Link to comment
Stefano Posted October 5, 2020 Share Posted October 5, 2020 Impressive. Looking forward to see what you will do with them (with your flashes). Link to comment
bvf Posted October 5, 2020 Share Posted October 5, 2020 Doubt they'll fit your Land Rover - the writing appears to be Polish (see https://dictionary.cambridge.org/dictionary/polish-english/zwierciadlo ) . You'd probably be better off with one of these - https://en.wikipedia.org/wiki/UAZ-469 . But be interesting to see what you can do with them. Link to comment
Cadmium Posted October 6, 2020 Share Posted October 6, 2020 Jonathan, That's pretty cool! Link to comment
dabateman Posted October 6, 2020 Share Posted October 6, 2020 You need to get some fun spot lights above your car and mount that. Then go hunting at night. I visualize that in a Crocodile Dundee movie for some reason. Link to comment
JMC Posted October 6, 2020 Author Share Posted October 6, 2020 Yes they should be good fun. I heard back from the vendor who I asked for a bit of history. Russian military apparently (so not for my Landrover, as you suspected Bernard). I did find some Landrover ones fof sale though, so it looks like the West had some too.... Link to comment
dabateman Posted October 6, 2020 Share Posted October 6, 2020 I don't know if this screen shot helps. But I wonder if one of the papers says NKC6. Link to comment
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