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

am I actually seeing IR light?

Joined
Jun 22, 2011
Messages
2,431
Points
83
You could check whether what you're seeing a second line at ~490nm or the actual IR with scotopic vision. You just need a diffraction grating and a cheap camera (to avoid frying your eyes).
 





Joined
Mar 27, 2013
Messages
2,416
Points
63
My guesses would've been random interaction with whatever the beam is hitting to get blue, but yes IR is picked up more by the rods than the cones, which makes it possible to see it as a faded gray color rather than red. Try and make the room you're in as dark as possible
 




Top