Cool, I was wearing polycarbonate safety glasses. Not for the UV, but because I didn't know what kind of abuse the tube had before I got it. The filament dissipates 12.5W, so the bulb gets pretty warm, even without any plate voltage. Mercury coated flying glass seemed like a possibility.
No, it flashes uniformly at ~50mS (~20Hz) rate. That "wobble" in the video, is due to tube flash rate "beating" with the video frame rate. I'll have to dig up the spectral characteristics of common clear plastics. I know acrylic is does not transmit IR. That's why laser engravers work well on them. But I'm not sure about the shorter wavelengths. On Wednesday, May 29, 2013 2:13:31 PM UTC-7, dr pepper wrote: > > Paint some of the white stuff on it from the inside of a fluorescent > tube, and you'll have a complicated white light bulb. > > They made us wear safety glasses at my last place, they had a lot of > welding bays, and claimed that clear polycarb safety glasses spread > out the uv from a flash enough to largely reduce the effects, so a > piece of clear polycarb might work. > > Does the bulb flash like in the vid or is it slower or faster in real > life. > > On 29 May, 20:16, Grahame Marsh <[email protected]> wrote: > > On 29/05/2013 19:02, JohnK wrote: > > > > > > > > > Much UV leak out do you think? > > > > > ..clip.. > > > > Fo a go-no go test you might look to see if the UV is strong enough to > > illuminate anything with UV writing on it. UK currency notes and > > European passports carry invisible (to the eye) markings that light when > > lit with even soft UV. My UV lightbox for PCB manufacture and UV leds > > are sufficient when held very close. I'm guessing that USA currency > > and/or passports might be marked as well? Or else writing using a UV > > security marker pen perhaps. > > > > Grahame > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/6e988287-2b79-4f03-9d4e-82fede1b61f6%40googlegroups.com?hl=en-GB. For more options, visit https://groups.google.com/groups/opt_out.
