If only such a filter were available at even an almost affordable price, with decent transmission
It sucks but you are looking at about 200$ and up for real good filters if you are not finding some old used lab fluorescence equipment for salvage
zbw2 filter is not good enough for what you say with very low fluorescent minerals
Band-pass-Filter—365nm-Laser-Line—FWHM-20nm
and 275nm LEDs with up to 50mW are not powerful enough for outdoor use, but can lite up a lot different minerals
Do you have a link for the “quad LG part”? I saw your pic on the FB group but my Google Fu is failing.
also another question would be simply order a 5x5mm filter and mount it above the LED itself
12.5$ is not so bad
for example this filter
Link broken - do you have a good one?
Have not seen these before - fantastic find, if they really work. I don’t see any mention of the angle of the light? Great idea, I think I’ll try them!
Thanks - link works now, Angle of incidence: 0° - I think that means any light not hitting pretty much at a direct 90d angle will be transmitted, no? Great for lasers, but LEDs? That’s the trouble with dichroics and UV bandpass (at least as far as I have seen).
This simple means it’s a 0° not a 45° or brewster angled filter, of course if light hits more angled it will lose some blocking
probably best here to use LEDs with a high dome not domeless ones
Not sure if you can source ZWB1 filters easily like ZWB2
The ones I’ve tested pass too much visible. Sadly… I use the narrow beam (high dome) LEDs but they really don’t work with the dichroic filters I’ve tried.
Yes, simple to order ZWB1 but we don’t use them other than for photography (reduces the blue/purple bleed you see in many fluorescent mineral photos). I’ve got a few ZWB1 filters, and ZWB3 filters also that we are testing for SW 254nm (Hoya is discontinuing the manufacture of u-325c bandpass filter glass - a big problem for us).
Problem with the ZWB3 is that it solarizes over 50% in under 100 hours - not suitable for shortwave lights.
https://www.ebay.com/itm/273958188158
I bought these today for my Convoy S2+ Nichia UV. I can compare them to ZWB2 once I receive them.
seems lasers are also no option
RLU4116E, 375 nm, 70 mW, 5.6 mm 4.700,00$
Just an FYI - way overpriced. You can get them on Aliexpress for less than $2.00, $0.50 in small qty. Special order, but they seem to be able to scrounge them up.
Those would be so neat to play with. But $4.7k probably not economical
FWIW - back when there was only one (cheap) source for the 405nm diodes I tore one out of a playstation. Built a mineral light - the very energetic beam was amazing, in spite of the purple light. Did things to minerals we didn’t expect.
Wonder if there’s some commercial application for this where we could do the same (rip the diode out).
Will Google…
you can buy 1W 405nm 38x38mm laser engraving machines under 50$
ZWB1? Which seller?
Just gotta ask the ones on Aliexpress that look like manufacturers (hard to sort from all the resellers). Eventually you’ll find one who has them. Lots of companies making these it seems.
That’s too vague.
You mentioned specific prices, are they from a specific seller that you or someone you know bought from? Which one? Are you confident what you received was a ZWB1 filter, not ZWB2?
Sorry, haven’t bought filters in over a year. Last time I bought I purchased 500 pcs of ZWB2 for $0.50/ea and 10ea ZWB1 for around $2 - but that’s a long time ago. Suggest you contact several of the manufacturers - I’m sure they will give you a good quote.