Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



New gizmo's

ped

Well-known member
Joined
Nov 25, 2008
Messages
4,914
Points
113
Know what they are? :) (without Googling ect)

 



diachi

Well-known member
Joined
Feb 22, 2008
Messages
9,736
Points
113
Know what they are? :) (without Googling ect)

HID lamps for your vehicle?

Edit: Saying that, doesn't look like other HID lamps I've seen - does look like some kind of lamp though.
 
Last edited:

ped

Well-known member
Joined
Nov 25, 2008
Messages
4,914
Points
113
Not HID no , they serve a specific function.
 

diachi

Well-known member
Joined
Feb 22, 2008
Messages
9,736
Points
113
Not HID no , they serve a specific function.

It's hard to tell from your pictures, but on closer inspection I don't seem to see any sign of a filament - so some sort of flash lamp maybe? Not sure what for - wouldn't be for a laser, they usually use linear flash lamps.

Am I getting warm? :D
 

DashApple

Well-known member
Joined
Jan 14, 2009
Messages
1,463
Points
83
They are cold cathode based , looking at the inverter behind ( similar to the ones for PC lighting tubes )


Are they UV bulbs in the > 340nm range ? UV C ?
 
Last edited:

diachi

Well-known member
Joined
Feb 22, 2008
Messages
9,736
Points
113
They are cold cathode based , looking at the inverter behind ( similar to the ones for PC lighting tubes )


Are they UV bulbs in the > 340nm range ? UV C ?
If anyone knows lamps, it's you! :D :bowdown:
 

ped

Well-known member
Joined
Nov 25, 2008
Messages
4,914
Points
113
It's hard to tell from your pictures, but on closer inspection I don't seem to see any sign of a filament - so some sort of flash lamp maybe? Not sure what for - wouldn't be for a laser, they usually use linear flash lamps.

Am I getting warm? :D
You're colder than the current temp in Yellowknife (just looked it up, -29!!) sheesh that cold :crackup:
They are cold cathode based , looking at the inverter behind ( similar to the ones for PC lighting tubes )


Are they UV bulbs in the > 340nm range ? UV C ?
Yep, except they are 185nm :D
 

diachi

Well-known member
Joined
Feb 22, 2008
Messages
9,736
Points
113
You're colder than the current temp in Yellowknife (just looked it up, -29!!) sheesh that cold :crackup:


Yep, except they are 185nm :D

Yeah, temperature really plummeted the last few days - it's now roughly where it should be for January! :D Bloody bitter out there.

See - Knew Ion would guess close! What are you going to use them for?
 

ped

Well-known member
Joined
Nov 25, 2008
Messages
4,914
Points
113
Haha Thanks , I know bits and pieces xD



So do I get cookies ? , > 340nm covers 185nm :p :D
Haha I laughed at that, yes it does cover 185nm :crackup:

They are part of an air purification system I'm building including 2 10g/hr ozone generators :)

As you know, that kind of light ain't no good for you so it's all going in a lightproof enclosure.
 

Sigurthr

Well-known member
Joined
Dec 11, 2011
Messages
4,374
Points
83
Ahh you guys beat me to it!

Very nice, Ped! I had a 185nm 200W LPHg lamp some 15 odd years ago and I loved it. Unfortunately it was fragile as eggshells and my folks lead to its demise by improperly trying to move it when I was away. Never did get a replacement. Sadly they junked the HV transformer that it was with too. Anyway, those almost look like the type which can be mounted directly into water tanks for purification.

Never mind the skin, 185nm gives you one hell of a corneal burn! It's like someone poured hot sand in your eyes and then sprayed you with lemon juice.
 

ped

Well-known member
Joined
Nov 25, 2008
Messages
4,914
Points
113
Here they are fired up, my Sony Z3 does the colour justice, that's how they appear IRL.

@Sig , so, even unfocused , they are cornea killers?

 
Last edited:

Sigurthr

Well-known member
Joined
Dec 11, 2011
Messages
4,374
Points
83
Oh yeah UV does not need to be focused, heh. They're probably pretty low wattage so you'll be ok for a few second exposures here and there. The onset of corneal UV keratitis feels like dry eyes. You can catch it early before it gets severe, it will still be unpleasant but bearable. So just be careful, or ya know, wear pretty much anything on your eyes that isn't quartz or fused silica, haha.
 

ped

Well-known member
Joined
Nov 25, 2008
Messages
4,914
Points
113
I'l wear my UV protection glasses :)
 

Cyparagon

Well-known member
Joined
Sep 12, 2007
Messages
9,595
Points
113
Low pressure mercury cold cathode lamps, typically with a quartz tube and designed for germicidal purposes. While mercury does have a 185nm line, it is absorbed almost instantly by the oxygen in the air. None of it gets to you. It's called vacuum UV below 200nm because it only travels in a vacuum.

254nm is the actual dominant line here, but it also has the standard 405, 436, 546, and 578nm visible lines which give it the light blue color.



You can protect from 254nm with ANY glasses you have lying around. Basically anything stops this wavelength, regular glass included.

> 340nm covers 185nm :p :D
185 is greater than 340, eh? :confused:
 
Last edited:

ped

Well-known member
Joined
Nov 25, 2008
Messages
4,914
Points
113

Don't be a stick in the mud, it was in jest :) .

But I was wondering what was giving it the light blue colour so your post makes sense. I knew there would be other peaks, but not at 254nm , thats handy to know.
 




Top