The PVS-31 PRO is a dual-tube night vision binocular built on the PVS-31 form factor. It uses a matched pair of Gen 2+ analog image intensifier tubes with autogating and P45 white phosphor screens. Each tube has a 50 degree field of view, and brightness gain is adjusted manually by the operator.
Autogating protects the tubes from strong light, and a low-voltage alarm is built in. The unit powers off automatically when it is flipped up or sideways. A built-in 850nm IR illuminator serves as a backup only, because the tubes amplify ambient light and do not rely on it.
Every unit ships with a printed factory QC spec sheet for each tube. The sheets list that unit's measured luminous sensitivity, FOM, luminance gain, SNR, resolution and dark spots by zone. The tubes are brand new, not blemished, resold or refurbished. The kit includes an L4 G24-pattern helmet mount, an AA x4 helmet battery pack and a hard-shell carrying case.
- Tube type
- Gen 2+ analog image intensifier, matched pair, autogated
- Phosphor
- P45 white phosphor
- FOM
- Baseline 1400-1550 (sample units measured 1541); tiers of 1600-1750, 1800-1950 and 2000-2100 also offered
- Resolution
- 64 lp/mm
- SNR
- 24+ (sample units tested 24.07-24.08)
- Luminance gain
- About 8,000 cd/m2/lx (sample units tested 8,083-8,118)
- Photocathode sensitivity
- 500 uA/lm or higher at 2850K (sample units tested 571 and 639)
- Cathode diameter
- 17.5mm useful diameter
- Dark spots
- Zero spots in every photocathode zone at every dark-spot size on both sample tubes
- Field of view