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 What does the LIF actually do?
m1garand__man  [Member]
2/4/2012 3:32:46 AM
I have a LIF on my PVS 14. Basically its on there because I have it but I dont notice any kind of effect on the optic at all. What does it actually do? I heard that its supposed to pretect the tube from laser light but I'm not sure if that is correct.
krpind  [Life Member]
2/4/2012 3:54:36 AM
tag
Dino1130  [Team Member]
2/4/2012 4:21:42 AM
The LIF makes a great (but expensive) sacrificial lens. It also blocks high power targeting lasers the military uses. It does not block IR lasers that would commonly be used on your rifle. Targeting lasers are a different wavelength and use extremely high power. A tube would be destroyed instantly by one of them .
m1garand__man  [Member]
2/4/2012 5:19:31 AM
Originally Posted By Dino1130:
The LIF makes a great (but expensive) sacrificial lens. It also blocks high power targeting lasers the military uses. It does not block IR lasers that would commonly be used on your rifle. Targeting lasers are a different wavelength and use extremely high power. A tube would be destroyed instantly by one of them .


So by "targeting laser" does that mean the kind of laser that forward observers use to guide an air attack on target with?
Dino1130  [Team Member]
2/4/2012 5:34:54 AM
Originally Posted By m1garand__man:
Originally Posted By Dino1130:
The LIF makes a great (but expensive) sacrificial lens. It also blocks high power targeting lasers the military uses. It does not block IR lasers that would commonly be used on your rifle. Targeting lasers are a different wavelength and use extremely high power. A tube would be destroyed instantly by one of them .


So by "targeting laser" does that mean the kind of laser that forward observers use to guide an air attack on target with?


If you mean something like a GCP than no. It uses the same wavelength as a IR rifle laser. The LIF blocks Yag lasers. Google Yag laser and you will learn more. I am not allowed to post the exact wavelengths that a LIF laser will block.

I know it is stupid because the information is all over the internet but I don't want to ruffle any feathers. LIF info cost ITT about 50 million. I don't have that kind of money !

A LIF is also very good at blocking a green laser. Try it out. This was not the intended purpose for the LIF but a byproduct of it blocking Yag lasers.

m1garand__man  [Member]
2/4/2012 2:44:37 PM
Originally Posted By Dino1130:
Originally Posted By m1garand__man:
Originally Posted By Dino1130:
The LIF makes a great (but expensive) sacrificial lens. It also blocks high power targeting lasers the military uses. It does not block IR lasers that would commonly be used on your rifle. Targeting lasers are a different wavelength and use extremely high power. A tube would be destroyed instantly by one of them .


So by "targeting laser" does that mean the kind of laser that forward observers use to guide an air attack on target with?


If you mean something like a GCP than no. It uses the same wavelength as a IR rifle laser. The LIF blocks Yag lasers. Google Yag laser and you will learn more. I am not allowed to post the exact wavelengths that a LIF laser will block.

I know it is stupid because the information is all over the internet but I don't want to ruffle any feathers. LIF info cost ITT about 50 million. I don't have that kind of money !

A LIF is also very good at blocking a green laser. Try it out. This was not the intended purpose for the LIF but a byproduct of it blocking Yag lasers.



Ok thanks. With some research I found out that Yag lasers are used as designators for air attacks. Ie laserguided munitions. So that makes perfect sense.
cj7hawk  [Team Member]
2/4/2012 10:08:15 PM

Originally Posted By m1garand__man:
Originally Posted By Dino1130:
Originally Posted By m1garand__man:
Originally Posted By Dino1130:
The LIF makes a great (but expensive) sacrificial lens. It also blocks high power targeting lasers the military uses. It does not block IR lasers that would commonly be used on your rifle. Targeting lasers are a different wavelength and use extremely high power. A tube would be destroyed instantly by one of them .


So by "targeting laser" does that mean the kind of laser that forward observers use to guide an air attack on target with?


If you mean something like a GCP than no. It uses the same wavelength as a IR rifle laser. The LIF blocks Yag lasers. Google Yag laser and you will learn more. I am not allowed to post the exact wavelengths that a LIF laser will block.

I know it is stupid because the information is all over the internet but I don't want to ruffle any feathers. LIF info cost ITT about 50 million. I don't have that kind of money !

A LIF is also very good at blocking a green laser. Try it out. This was not the intended purpose for the LIF but a byproduct of it blocking Yag lasers.



Ok thanks. With some research I found out that Yag lasers are used as designators for air attacks. Ie laserguided munitions. So that makes perfect sense.

LIFs are a touchy subject due to ITAR and the fact that ITT got fined 20 Million for sending specifications outside of the US without export approval once.

This Page contains everything that has been publicly released by the US government or is known about the LIFs that is exportable and exempt from ITAR controls. There is, of course, quite a bit more to the topic but that is not something that can be posted, so please don't anyone add to this unless you can demonstrate that the information does not violate ITAR ( US ) or the DSGL ( Australia ) -

Regards
David