Dmitry Posted June 16, 2018 Share Posted June 16, 2018 Gear used:Olympus e-pm1 body full spectrum converted myself.Lomo T-43 triplet lens.More details in index topic Sun, no filter Quartz lamp, no filter Quartz lamp, qb21 Quartz lamp, zwb1 Quartz lamp, zwb2 Quartz lamp, zwb3 UV black U-tube, no filter UV black U-tube, zwb1 UV black U-tube, zwb2 UV black U-tube, zwb3 Link to comment
Dmitry Posted August 6, 2018 Author Share Posted August 6, 2018 Got my own UV blacklight. It have label "AD BLB-T5/4W" No filters Seems it's lamp limit, friend have better spectrum on his lamp (see 1st post). Link to comment
Andy Perrin Posted August 6, 2018 Share Posted August 6, 2018 Why does yours not have a line spectrum? Do they put some fluorescent material in the blacklights? Link to comment
Dmitry Posted August 6, 2018 Author Share Posted August 6, 2018 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 :) Link to comment
Dmitry Posted August 24, 2018 Author Share Posted August 24, 2018 I now have my own quartz mercury lamp B) no filter, iso800 0.4s exposure 315nm filter, iso200 60s exposure 334nm line is visible! Note second-order spectrum also. Link to comment
Andrea B. Posted August 28, 2018 Share Posted August 28, 2018 Aha!! good to see that 334 line. Link to comment
eye4invisible Posted August 28, 2018 Share Posted August 28, 2018 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? Link to comment
Dmitry Posted August 28, 2018 Author Share Posted August 28, 2018 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. Link to comment
Dmitry Posted April 13, 2019 Author Share Posted April 13, 2019 New test on e-m5 without dustshaker No filtes zwb2 filter Link to comment
Fandyus Posted September 5, 2021 Share Posted September 5, 2021 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 315nm filter, iso200 60s exposure 334nm line is visible! Note second-order spectrum also.What do you mean by quartz lamp? Do you mean a Mercury vapor germicidal lamp? Link to comment
Dmitry Posted September 5, 2021 Author Share Posted September 5, 2021 Old USSR device https://www.google.com/search?q=%D0%BA%D0%B2%D0%B0%D1%80%D1%86%D0%B5%D0%B2%D0%B0%D1%8F+%D0%BB%D0%B0%D0%BC%D0%BF%D0%B0+%D1%84%D0%BE%D1%82%D0%BE%D0%BD+%D0%BC%D1%8D%D0%BB%D0%B7&source=lnms&tbm=isch Link to comment
Fandyus Posted October 27, 2021 Share Posted October 27, 2021 On 9/5/2021 at 4:06 PM, Dmitry said: Old USSR device https://www.google.com/search?q=%D0%BA%D0%B2%D0%B0%D1%80%D1%86%D0%B5%D0%B2%D0%B0%D1%8F+%D0%BB%D0%B0%D0%BC%D0%BF%D0%B0+%D1%84%D0%BE%D1%82%D0%BE%D0%BD+%D0%BC%D1%8D%D0%BB%D0%B7&source=lnms&tbm=isch Oh, interesting, what is the mechanism by which it emits light? It must have been expensive. Link to comment
enricosavazzi Posted December 24, 2021 Share Posted December 24, 2021 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. Link to comment
Guest Posted December 24, 2021 Share Posted December 24, 2021 Doubles as a wireless phone charger. Link to comment
Fandyus Posted December 24, 2021 Share Posted December 24, 2021 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. Link to comment
Dmitry Posted December 27, 2021 Author Share Posted December 27, 2021 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. Link to comment
colinbm Posted December 28, 2021 Share Posted December 28, 2021 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. Link to comment
Stefano Rosoni Posted February 10, 2023 Share Posted February 10, 2023 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. Link to comment
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