The BN -1 night binoculars are used to observe the battlefield at night. The range of visibility with night binoculars depends on the level of fading radiation of the night sky , the permeability of the atmosphere , the nature of the observed terrain objects and the contrast of the objects with the background .
A telescope is an observing instrument for night vision , based on the principle of enhanced brightness of the image of the observed terrain objects by an electro-optical transducer . The image of the observed terrain objects, illuminated by the residual radiation of the night sky, is projected by the lens onto the photocathode of the electro-optical converter. When illuminated, the photocathode emits electrons and thus produces an electron image in which the distribution of the electron flux density corresponds to the brightness distribution of the original optical image. Under the influence of the accelerating voltage, the electron image is transferred to the surface of the luminescent shielding and diffuses out . The degree of build-up of the shield , i.e. the brightness of its individual points , corresponds to the brightness distribution in the optical image of the observed field objects. In this way, an image of the observed object is formed on the shield of the electro-optical converter , the brightness of which is considerably higher than the brightness of its image projected by the lens onto the photocathode. The image thus formed is sufficiently bright for observation with an eyepiece .
Technical parameters:
distance of recognition of a person in an uncovered position against a green background
in natural night light . . . . . . . . . . . . . . 3 - 5 x 10(-3) lux
working temperature range . . . . . . . . . . . . . . . . . . . . -40°C to +40°C
magnification . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 3,2x (+-0,3)
field of view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9°
eyepiece pitch adjustment range . . . . . .from 62 to 72 mm
eyepiece focusing option . . . . . . . . . . . . . . . . .-4 to +4 diopters
battery voltage . . . . . . . . . . . . . . . . . . . . . . 8.3 to 8.8 V
Continuous operation time (without battery change ):
at +20°C for at least 7h
at +40°C at least 5h
at -40°C at least 3h
Voltage on the electro-optical converter . . . . . . . . . . . . . . . . . 18 kV
external dimensions of the telescope . . . . . . . . . . . . . . . 245x189x91 mm
outer dimensions of the case . . . .. . . . . . . . . . . . . . . 283x215x126 mm
weight in marching position . . . . . . . . . . . . . . . . 3.5 kg
weight in working position . . . . . . . . . . . . . . . . . . 1.6 kg
Accessories:
Case
optical wipe
recorder
battery 7D-0,115-U1.1
battery charger
binoculars BN-1
aperture
A telescope is an observing instrument for night vision , based on the principle of enhanced brightness of the image of the observed terrain objects by an electro-optical transducer . The image of the observed terrain objects, illuminated by the residual radiation of the night sky, is projected by the lens onto the photocathode of the electro-optical converter. When illuminated, the photocathode emits electrons and thus produces an electron image in which the distribution of the electron flux density corresponds to the brightness distribution of the original optical image. Under the influence of the accelerating voltage, the electron image is transferred to the surface of the luminescent shielding and diffuses out . The degree of build-up of the shield , i.e. the brightness of its individual points , corresponds to the brightness distribution in the optical image of the observed field objects. In this way, an image of the observed object is formed on the shield of the electro-optical converter , the brightness of which is considerably higher than the brightness of its image projected by the lens onto the photocathode. The image thus formed is sufficiently bright for observation with an eyepiece .
Technical parameters:
distance of recognition of a person in an uncovered position against a green background
in natural night light . . . . . . . . . . . . . . 3 - 5 x 10(-3) lux
working temperature range . . . . . . . . . . . . . . . . . . . . -40°C to +40°C
magnification . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 3,2x (+-0,3)
field of view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9°
eyepiece pitch adjustment range . . . . . .from 62 to 72 mm
eyepiece focusing option . . . . . . . . . . . . . . . . .-4 to +4 diopters
battery voltage . . . . . . . . . . . . . . . . . . . . . . 8.3 to 8.8 V
Continuous operation time (without battery change ):
at +20°C for at least 7h
at +40°C at least 5h
at -40°C at least 3h
Voltage on the electro-optical converter . . . . . . . . . . . . . . . . . 18 kV
external dimensions of the telescope . . . . . . . . . . . . . . . 245x189x91 mm
outer dimensions of the case . . . .. . . . . . . . . . . . . . . 283x215x126 mm
weight in marching position . . . . . . . . . . . . . . . . 3.5 kg
weight in working position . . . . . . . . . . . . . . . . . . 1.6 kg
Accessories:
Case
optical wipe
recorder
battery 7D-0,115-U1.1
battery charger
binoculars BN-1
aperture