Laser bore sighters, NVG optics.

[bsmith_shoot]

I was working on my SBR today, and noticed something really odd. When using my laser bore sighter, you cant see it through my T1. Why is this? I aligned my Troys, then slapped on the micro, and there was nothing. Please explain this?
Thanks,
Brandon

[Seth247]

The optical coating applied to aimpoints is part of what gives them their long battery life. The coating is engineered to reflect as much light as possible of a certain spectrum, which allows them to get a brighter visible dot reflected off of the front lens, with less energy output from the led. since aimpoint uses red LEDs, that spectrum their coating is attuned to is that red. the coating is most likely applied to both sides of the front lens since that would just be easier, therefore most/all of the red light from your laser , which is a very similar shade of red, is reflecting off of this coating and is therefore not passing through the optic.

This is the same reason why looking through some optics makes everything look blue, because it is reflecting more of the red spectrum.

[Seth247]

I'm on a phone and can't edit but I wanted to add, this reflective coating technology is call a "band-pass" coating. Because it allows a certain band of light frequencies to pass through it, and a certain band is reflected.

[bsmith_shoot]

Thats what I thought, well, close anyways. I figured it had something to do with the coating. Thanks my friend.
God bless,
Brandon

[militarymoron]

i sight in my T-1 with a laser boresighter. i can clearly see the laser's dot through it.

[bsmith_shoot]

i sight in my T-1 with a laser boresighter. i can clearly see the laser's dot through it.

Which one you got?

[militarymoron]

it's a laserlyte brand boresighter. here's a question: with your laser boresighter turned on and pointed at a wall, and holding your T-1 in your hand and looking through it (not mounted to the gun), the laser dot disappears the moment you look through the T-1 at it?

[bsmith_shoot]

it's a laserlyte brand boresighter. here's a question: with your laser boresighter turned on and pointed at a wall, and holding your T-1 in your hand and looking through it (not mounted to the gun), the laser dot disappears the moment you look through the T-1 at it?

Yep. I also mounted the t1 on my rifle, and zeroed the dot to my irons. Couldnt see the laser at all. The optic is good with my irons, but the laser wont show through it.
Heres a real kicker, mines a Laserlyte too.
Brandon

[militarymoron]

that's weird. i just tested my T-1 and H-1 with two different red vis lasers (laserlyte and the vis laser on a DBAL) and i can see them clearly through it.
just to double check what you're saying - this happens when the T-1 is not mounted to the weapon as well?

[bsmith_shoot]

Sure does man. Funny thing is, I sighted in an M2 with it and could see it perfectly.