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Glowing UV

Glowing UV

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This is an image taken of a 400W SON (Osram) arc tube glowing blue and placed inside a broken fluorescent lamp. The coating is obviously fluorescing with the UV content in the glow from the SON arc tube.

gasses.jpg UV_Phos.jpg tes_induction.jpg Tungar.jpg

Light Information

Light Information

Manufacturer:Osram
Model Reference:SON
Electrical
Wattage:400W

File information

File information

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Filename:UV_Phos.jpg
Album name:tuopeek / misc
Keywords:Miscellaneous
File Size:73 KB
Date added:Oct 03, 2016
Dimensions:900 x 1205 pixels
Displayed:125 times
Date Time:2016:10:03 19:30:16
DateTime Original:2016:11:02 19:24:10
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Exposure Time:30/10 sec
FNumber:f 3.1
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Focal length:4.3 mm
ISO:200
Make:FUJIFILM
Model:FinePix S3400
Software:Adobe Photoshop Elements 2.0
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URL:http://www.lighting-gallery.net/gallery/displayimage.php?pos=-126139
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Ash
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Oct 03, 2016 at 12:58 PM Author: Ash
Awesome. Never knew there is UV in the Phosphorescence of the SON arctubes. But what light it takes to excite it so it can put out UV ? Does the fill in the arctube put out shorter wavelength that is capable of it or you had to use outside light source ?
tuopeek
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Oct 03, 2016 at 01:23 PM Author: tuopeek
It appears to be stimulated from a short UV emission during initial start. Quite easy to do if a high voltage is applied to the lamp but not enough current to ignite it. I haven't tried an external UV source yet.
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tuopeek 111967450636623837217 tuopeek1
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Oct 03, 2016 at 01:57 PM Author: tuopeek
Got me thinking, I tried the arc tube under a UV ā€œCā€ lamp. It does make it glow but not nearly as much as high voltage pulse. So I think it may be electron bombardment that makes it glow the most. This also ties in with the fact the glow under UV ā€œCā€ is end to end but nothing behind the electrodes glow when pulsed.
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Oct 03, 2016 at 02:15 PM Author: Ash
I got HPS arctubes to glow like that just form momentary power up on the normal HPS gear, or on CCFL inverter and other sources of low current HV. Also got it to glow by exciting with Xenon strobe from outside. But i never tested the emitted light for UV content
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Oct 03, 2016 at 03:03 PM Author: tuopeek
Interesting a strobe light works, don't think they will produce any shortwave UV.
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Nov 27, 2016 at 03:15 PM Author: don93s
I've seen HPS lamps with mercury/argon buffer that start out looking mercury vapor until run-up vaporizes the sodium.
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