IRV1 and IRV2 series
IRV Series infrared (IR) viewers are designed to observe radiation emitted by infrared laser or laser diode light sources that can't be seen with the naked eye.
The Infrared Viewers are offered in various versions with spectral responses that cover anywhere from 350 nm up to 2000 nm.
The lightweight, compact device can be used handheld, post mounted with the ¼-20 internal thread, or facemask-mounted for hands-free operation.
Applications for these IR viewers include laser beam alignment, optical fiber alignment, semiconductor inspection, fluorescence, IR luminescence, thermal imaging, night vision, and photo processing.
Typically, the sensitivity of the IR viewer quickly is reduced starting from 1300 nm. However, it is possible to observe low intensity IR beam with proper viewing conditions, such as the spectral filtration, reduced external background noise, short distance of observation, the use of a metallic surface for viewing the IR reflective radiation (instead of a paper material, which has high absorption in IR). The approximate minimal power densities, required for the viewing of infrared laser beam at one meter distance, are as follows: 3 mW/cm² for 1.5 µm, 50 mW/cm² for 1.7 µm ,180mW/cm² for 1.8 µm, 1 W/cm² for 1.9 µm and 2 W/cm² for 2.0 µm.
The minimum power density specification for the IRV2-xx is the same as for the IRV1-xx.