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

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

Wow, I have a new 850mW green!

Emc2

Emc2

0
Joined
Oct 16, 2007
Messages
303
Points
18
Actually I think the IR filter is missing. It is a 150-200mW powered by 2 AAA batteries and tested on a meter. Not sure if I want to keep it as it may not be as safe to use. I was surprised to see it go that high on the meter. I thought the meter was broke or on the wrong setting. Right now I'm at the Texas Star party in fort Davis Texas and I purchased the laser from a vendor. It is really bright green, at least 180mw. No way to really test it without the IR coming out like it is.

Todd
 





InfinitusEquitas

InfinitusEquitas

0
Joined
Mar 27, 2011
Messages
14,125
Points
113
A pen on AAA's putting out 850mW of green? Or 180mW? The latter is possible, I've metered one cheap chinese pen at 176mW peak. Of course 60mW of it was IR:whistle:

Update the thread/title please.
 
bootleg2go

bootleg2go

0
Joined
Nov 8, 2006
Messages
656
Points
0
Emc2 said:
Actually I think the IR filter is missing. It is a 150-200mW powered by 2 AAA batteries and tested on a meter. Not sure if I want to keep it as it may not be as safe to use. I was surprised to see it go that high on the meter. I thought the meter was broke or on the wrong setting. Right now I'm at the Texas Star party in fort Davis Texas and I purchased the laser from a vendor. It is really bright green, at least 180mw. No way to really test it without the IR coming out like it is.

Todd
Click to expand...
Hi Todd,
I envy you being there and I am not.
There's no way to get over about 250mw of 532nm from a pen pointer with 2 AAA cells.
What kind of meter did you use?
The reason I ask is if it's coherent laser check or other meter that uses a silicon based detector, it's easy to get really high readings if just a small of IR is being emitted.
The reason is that silicon based detectors are extra sensitive to the IR wavelengths.
If a 100mw 532nm pointer has just 10mw of IR, it can skew the readings to show 200mw or more. In fact I had one one time that was leaking ~100mw of IR and it made the laser check beep in overload as being over 1000mw.

Jack
 
Emc2

Emc2

0
Joined
Oct 16, 2007
Messages
303
Points
18
bootleg2go said:
Hi Todd,
I envy you being there and I am not.
There's no way to get over about 250mw of 532nm from a pen pointer with 2 AAA cells.
What kind of meter did you use?
The reason I ask is if it's coherent laser check or other meter that uses a silicon based detector, it's easy to get really high readings if just a small of IR is being emitted.
The reason is that silicon based detectors are extra sensitive to the IR wavelengths.
If a 100mw 532nm pointer has just 10mw of IR, it can skew the readings to show 200mw or more. In fact I had one one time that was leaking ~100mw of IR and it made the laser check beep in overload as being over 1000mw.

Jack
Click to expand...

Hi Jack,
Yes I used a Melles Groit laser check that belongs to Howie Glatter (he sells laser collimator for telescopes) he had the meter and we checked it. I guess my post was confusing or the members just read it wrong. The laser was advertised as a 150mW, but when we checked it on the meter (Laser check), it read over 850mW. That's when we came to the conclusion that the laser had no IR filter. That is what I wanted to get across, kind of like mild sarcasm in a way in my title post.

Todd
 
bootleg2go

bootleg2go

0
Joined
Nov 8, 2006
Messages
656
Points
0
Fenzir said:
so you have a 700mw IR laser putting out 180mw 532?
Click to expand...

No, the lasercheck or I should say the silicon based sensors in general are very sensitive to IR. They will only measure IR correctly if the meter is set to the wavelength of the IR. If the meter is set to 532nm, then a little bit of IR will result in a very large reading. It could easily report 850mw if it was outputting ~ 100-150mw of 532nm with another 30-40mw of IR riding on top of it.

Todd,
If you want to confirm what it really is, just send it to me and I'll check it out for you.

Jack
 
InfinitusEquitas

InfinitusEquitas

0
Joined
Mar 27, 2011
Messages
14,125
Points
113
Fenzir said:
so you have a 700mw IR laser putting out 180mw 532?
Click to expand...

:crackup::crackup::crackup: LMAO!

I think you meant an 850mW IR pointer with 150mW of green:D

What I'm taking away from this is that some LPM's are hypersensitive to IR output.

EDIT: bootleg2go beat me to it!
 
Last edited:
yobresal

yobresal

0
Joined
Nov 5, 2007
Messages
4,919
Points
83
Yeah that is an error with the meter. I had one before that would do similar things. That is not the actual IR output. That is just how the meter is reading it like Jack said. Fun title though. Got me to look.
 
You must log in or register to reply here.




Top