Filter type used for this video on sale here: www.ebay.ie/itm/156189179840

You may wish to try a simple ZWB3 instead for around a fifth the cost and much less visible light contamination. We like them for using with deep ultraviolet AlN UVC LEDs to notch out the chip autofluorescence in the visible so as to give a purer light for illuminating fluorescent minerals. It will admit less IR overall in the longer wavelengths beyond around a micron, but so little of that is actually detected by the cmos of a phone camera anyway it doesn't really matter.

@MuonRay

Ай бұрын

This is great inside information thank you! Are you using these filters for microscopy or NDVI? I have used ZWB2, the famous UV flashlight filters, along with QB19 shown here as well as BG3 and QB4 filters, along with several from Kolari Vision (with my hot-mirror filter removed drone camera). I must upload a video next of the ZWB2 to compare with the phone camera used here.

@Muonium1

Ай бұрын

@@MuonRay I'm just using the emitters for deep UV flashlights that I use to excite fluorescent minerals like willemite and the terlingua type calcite. I have a Yingfeng HYF50P45F250AG-X4E emitter, which as of a few months ago anyway was the highest power UVC LED available, and the ZWB3 cleans its emission of visible light nicely (not totally of course, but mostly). A ZWB2 will get you similar results for your purposes with even better visible blocking ability, but will admit somewhat less IR and almost no UVC. If you search for that specific part number you will find a post on another site I did with some traces of the emission spectra both filtered and unfiltered. If you search for the phrase "modified phone sterilizer emitting 280nm light" you can see some additional traces of ZWB3 filtered light from one of those cheap Homedics phone sterilizers that became popular during the pandemic. It is the cheapest source of pure UVC light I was ever able to find, and though not bright, is useful for philately and mineral shortwave fluorescence detection.

@MuonRay

Ай бұрын

I read what you wrote about the algorithm and replied and of course KZread deleted my reply! Definitely some skullduggery going on here!