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

Does the dx True Green Laser 30mw have a IR filter

Joined
May 24, 2008
Messages
20
Points
0
I have just bought a True Green Laser Pen off DX and some people have been saying that it doesn't have an IR filter and some people say it does. Could someone PLEASE tell me because at the moment I am confused whether or not it does

thanks guys ;)
 





Razako

0
Joined
Mar 17, 2006
Messages
4,301
Points
113
Re: DOES THE DX True Green Laser 30MW HAVE A IR FI

If you bought the "true" laser it should have an IR filter. Dx only says they don't so people don't sue them if freak laser goes out without an ir filter.
 

Switch

0
Joined
Dec 9, 2007
Messages
3,327
Points
0
Re: DOES THE DX True Green Laser 30MW HAVE A IR FI

Mine doesn't.I have only my webcam to test it.But even when shone at through a coke glass(clear glass full of coke) it completely flashblinds the webcam.Now that is many many times brighter than a TV remote LED appears on the same webcam.And for a 30mW greenie I should say that that is a lot of IR.So I concluded that it doesn't have one. :p It's a good laser though, TEM00, 1-1.5mm beam diameter, and estimated 1.5mRad.The IR can't be more than 10-15mW, and combined with 30mW of bright green , I'm not worrying about getting hit in the eyes.
 
Joined
Feb 29, 2008
Messages
2,344
Points
0
Re: DOES THE DX True Green Laser 30MW HAVE A IR FI

DO YOU have a WORKING caps LOCK? ::)
:D
::)

mine vary : one does, the other does.
 

Switch

0
Joined
Dec 9, 2007
Messages
3,327
Points
0
Re: DOES THE DX True Green Laser 30MW HAVE A IR FI

mine vary : one does, the other does.

Lol :p but yea, we get what you wanted to say

What's the problem with the CapsLock? :-/
 
Joined
Feb 29, 2008
Messages
2,344
Points
0
Re: DOES THE DX True Green Laser 30MW HAVE A IR FI

i thought it was considered rude :-[
 

Switch

0
Joined
Dec 9, 2007
Messages
3,327
Points
0
Re: DOES THE DX True Green Laser 30MW HAVE A IR FI

robjdixon said:
i thought it was considered rude :-[

Oh you mean the title. :p I was reading the posts and didn't see no caps abuse.Well, yeah, good point, it is considered unecessary, at least. :p
 
Joined
Jun 13, 2007
Messages
5,410
Points
113
Re: DOES THE DX True Green Laser 30MW HAVE A IR FI

My DX30 has an IR filter, but recently people have said that some of them being sent out don't have IR filters.
 
Joined
May 24, 2008
Messages
20
Points
0
Re: DOES THE DX True Green Laser 30MW HAVE A IR FI

is there an easy way to check if it has one without pulling the laser apart?



soz bout the caps ill change it now
 
Joined
Jul 27, 2007
Messages
3,642
Points
63
Re: DOES THE DX True Green Laser 30MW HAVE A IR FI

see if you have a camera that can see IR fairly easily (test with a TV remote), then shine the laser through something that blocks green but passes IR and check on the camera

here is a pic of my DX true 5, it has a very good IR filter, the dot isn't even white
 

Attachments

  • dx5.JPG
    dx5.JPG
    36.5 KB · Views: 231
Joined
Jun 13, 2007
Messages
5,410
Points
113
Re: DOES THE DX True Green Laser 30MW HAVE A IR FI

silly-jimmy said:
is there an easy way to check if it has one without pulling the laser apart?
You can test it by folding up a few pieces of film negative, put it on the front of the laser, and point the laser in to a webcam/digital camera. If you see light on the webcam, the laser isn't IR filtered, the film negative blocks the visible light but lets the IR light through.
 
Joined
May 24, 2008
Messages
20
Points
0
Re: DOES THE DX True Green Laser 30MW HAVE A IR FI

does the camera/webcam have to be on a certain mode?
 
Joined
Jul 27, 2007
Messages
3,642
Points
63
Re: Does the dx True Green Laser 30mw have a IR fi

if your camera has a nighvision mode then yes, otherwise no
 
Joined
Oct 26, 2007
Messages
5,438
Points
83
Re: Does the dx True Green Laser 30mw have a IR fi

I compared the IR of a 30mW "true" laser, and a 30mW Rominsen laser, and they appeared about the same. Both were, of course, more than the Newwish 5mW laser I've got as well. However, in the end, I don't consider these things IR filtered anyway. If it were properly filtered, it would have the kind of output my 80mW CNI laser has: practically nothing. Even my 5mW one has like 10x or more times the IR of the 80mW laser.

That being said, if the IR output of these lasers is less than the 532nm output, I don't think there's much to be afraid of, because the danger with IR is that we can't see it, and therefore can't react to it. However, with bright green light coming out of the laser, our eyes will react to the beam.
 
Joined
Oct 23, 2007
Messages
1,904
Points
0
Re: Does the dx True Green Laser 30mw have a IR fi

true30irhk9.png
 
Joined
Mar 14, 2008
Messages
1,402
Points
0
Re: Does the dx True Green Laser 30mw have a IR fi

Your diagram is inaccurate. There's no WOOTWOOTWOOT coming out of the lazor.
 




Top