TPN-1M-49-23 night tank sight is an electronic-optical passive and active night vision device, which is designed for surveillance of the combat area and direct fire aiming when shooting from the tank cannon and its coaxial gun from standing position and in motion on moving and stationary targets in night conditions.
- Range of vision of the tank type targets in passive mode, when target contrast against background is not less than 0.4, atmospheric transparency is not less than 0.7, and natural night lighting ranges from 5×10-3 to 5 lux: not less than 1300 m
- Range of vision of the tank type targets in active mode when targets are illuminated by L 2G illuminator with an infrared filter, target contrast against background is not less than 0.4, atmospheric transparency is not less than 0.7: not less than 800 m
- Field of view: not less than 6 degrees
- Exit pupil diameter: not less than 8 mm
- Distance of the exit pupil: 45±2 mm
- Ocular diopter setting: not less than ±4 diopter
- Periscope line-of-sight height: 260±14 mm
- Resolution limit in the center of the field of view: not less than 45 lines/mm
- Parallax between the image of an object and the image of the grid: not more than 0.25 diopter
- Boundary of vertical line of sight oscillation up: 20 degrees
- Boundary of vertical line of sight oscillation down: 5 degrees
- Boundary of collimation by height: ±17 mil
- Boundary of collimation by direction: ±10 mil
- Power supply voltage (DC power): 27 V
- Consumer power: not more than 6 W
- Overall dimensions: not more than 280×256×430 mm
- Weight: not more than 13 kg
