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UltravioletPhotography

Mercury Hg lamp spectrum lens test - Lomo T-43 40mm f4


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Gear used:

Olympus e-pm1 body full spectrum converted myself.

Lomo T-43 triplet lens.

More details in index topic

 

Sun, no filter

post-192-0-88517200-1529168809.jpg

 

Quartz lamp, no filter

post-192-0-11586100-1529168887.jpg

 

Quartz lamp, qb21

post-192-0-38247200-1529168894.jpg

 

Quartz lamp, zwb1

post-192-0-55886000-1529168899.jpg

 

Quartz lamp, zwb2

post-192-0-19889200-1529168905.jpg

 

Quartz lamp, zwb3

post-192-0-53077000-1529168911.jpg

 

UV black U-tube, no filter

post-192-0-28905500-1529168917.jpg

 

UV black U-tube, zwb1

post-192-0-12623200-1529168926.jpg

 

UV black U-tube, zwb2

post-192-0-15326400-1529168932.jpg

 

UV black U-tube, zwb3

post-192-0-31814900-1529168940.jpg

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  • 1 month later...

Got my own UV blacklight. It have label "AD BLB-T5/4W"

 

No filters

post-192-0-82810300-1533576284.jpg

 

Seems it's lamp limit, friend have better spectrum on his lamp (see 1st post).

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It have two narrow lines 405nm and 436nm.

Line 365nm is wide and bright. Probably it have some material or coating.

 

In any case, it's useful - it is powered by 4xAA batteries and can be used outdoors away from electricity :)

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  • 3 weeks later...

I now have my own quartz mercury lamp B)

 

no filter, iso800 0.4s exposure

post-192-0-11896000-1535137440.jpg

 

315nm filter, iso200 60s exposure

post-192-0-93663400-1535137448.jpg

 

334nm line is visible! Note second-order spectrum also.

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eye4invisible

I've been playing around with some projection lenses recently (more for visible and full spectrum videography, than for anything UV-specific).

 

How are you attaching your ZWB filters to these types of lenses?

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My two copies of T-43 have 35.5mm and 27mm filter threads. I use step-up rings to more common 37mm and 46mm.

 

In worst case you can glue step-up ring in front of lens.

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  • 7 months later...
  • 2 years later...

I now have my own quartz mercury lamp <img src='http://www.ultravioletphotography.com/content/public/style_emoticons/default/cool.png' class='bbc_emoticon' alt='B)' />

 

no filter, iso800 0.4s exposure

post-192-0-11896000-1535137440.jpg

 

315nm filter, iso200 60s exposure

post-192-0-93663400-1535137448.jpg

 

334nm line is visible! Note second-order spectrum also.

What do you mean by quartz lamp? Do you mean a Mercury vapor germicidal lamp?

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  • 1 month later...
  • 1 month later...
enricosavazzi
On 10/27/2021 at 10:28 PM, Fandyus said:

Oh, interesting, what is the mechanism by which it emits light? It must have been expensive.

Guessing from the accompanying scheme, it looks like a (radio-frequency?) oscillator feeds a coil that excites gas inside a sealed glass tube with an oscillating electromagnetic field, possibly inducing a luminescent discharge in the latter. I cannot read Russian, so I am just guessing. There are no electrodes at all in the gas tube, so the external electromagnetic field is the only thing that can pump energy into the gas.

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5 hours ago, enricosavazzi said:

Guessing from the accompanying scheme, it looks like a (radio-frequency?) oscillator feeds a coil that excites gas inside a sealed glass tube with an oscillating electromagnetic field, possibly inducing a luminescent discharge in the latter. I cannot read Russian, so I am just guessing. There are no electrodes at all in the gas tube, so the external electromagnetic field is the only thing that can pump energy into the gas.

I see, thanks a lot.

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5 hours ago, Dmitry said:

Found some explanation about this device with schematics - http://wkarl.narod.ru/3t_dop19.htm

Working frequency is 40,68 MHz induced on quartz capsule with Hg inside.

I got this warning from my server....
 

Malicious Content

We've blocked a website that may contain Malicious Content. The http://wkarl.narod.ru site you've been blocked from visiting may contain viruses, trojans or spyware that can be harmful to your devices.

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  • 1 year later...
Stefano Rosoni
On 28/12/2021 at 01:57, colinbm said:

Ho ricevuto questo avviso dal mio server....
 

Contenuto dannoso

Abbiamo bloccato un sito Web che potrebbe contenere contenuti dannosi. Il sito http://wkarl.narod.ru che ti è stato impedito di visitare potrebbe contenere virus, trojan o spyware che possono essere dannosi per i tuoi dispositivi.

I went to the site http://wkarl.narod.ru/3t_dop19.htm and found no threats. Browsers often prevent users from navigating for fear of who knows what hidden dangers in certain sites, but this is not true.

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