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

Vertically filtering IR filter? What?

Joined
Oct 16, 2013
Messages
66
Points
0
I just purchased these online and was wondering if they were adequate for my 100 mW green and a couple "5mW" ebay greens.

IR Filter Lens High 532nm Laser Transmittance 2pcs PAC | eBay

I noticed that it says "Filter method: Vertical"

does this mean it only blocks IR that is polarized vertically? Do i need to stack two perpendicular to each other in order to get full blockage?

If so can someone direct me to some proper IR filters for the 100mW and 5mW greens?

Thanks for any replies! i really appreciate all the help im getting here as a brannnd new member.
 





Joined
Feb 4, 2010
Messages
3,278
Points
113
^ ...No.

Just put the filter in place. It won't be polarized or anything. Mind you, you're buying from china. Wording right never is.
 
Joined
Oct 16, 2013
Messages
66
Points
0
Thank you Zraffleticket.

I assumed so, if it really was what the previous replier said it was, that's just some sort of prism, which would, as the diagram suggests, just refract each of the different wavelengths at a different angle. Thank god it isn't that. That would make my situation much worse, as the IR wouldn't even be coming out with the same vector as the visible light, making detection and reduction an even uglier task. Why would anyone buy anything that would do such a horrendous thing to a green laser? Maybe a multi colored diode would collect some benefits from such a device.
 
Joined
Feb 4, 2010
Messages
3,278
Points
113
They have their purposes-- but certainly not for any handheld anybody on the forums would ever need, or want for that matter.

Typically multiple wavelength diodes are flukes or engineering samples anyway, even fewer of us have those. (except isn't there a DVD burner diode that's 650/780nm? I don't play around with diodes so I have no clue to be honest)
 




Top