Night vision binocular “Baigish-12” documentation 

1. GENERAL

1.1 The night vision binocular “Baigish-12” (figure 1) is designed for observation of animate nature and terrain under conditions of an ambient skylight intensity or faint artificial lighting.
The night vision binocular “Baigish-12A” (figure 2) is designed for observation in total darkness with the use of infrared (IR) illuminator.
The visibility range depends on the type of the objects observed, intensity of illumination, contrast between the object and the background and transparency of the atmosphere.
The binocular is serviceable at a temperature of-30 to +40 °C.
Power to the binocular is supplied from a 9-V d.c. source -batteries “Korund” 6PLF22, “TOSHIBA” 6F22U, 6F22K, 6F22S, “ENERGIZER”, “VARTA” 6F22.
Power to the IR illuminator is supplied from two 1.5-V elements CLJ-0,18 (standard size SR44).
The binocular is a sophisticated optical electronic device. To ensure its failure-free operation, NEVER:
– disassemble the binocular yourself;
– supply power to the binocular from power sources exceed ing 9 V;
– supply power to the IR illuminator from power sources ex ceeding 3 V (“Baigish-12A”);
– operate the binocular in the daytime with the objective len ses open;
– lay the cut-in binocular on bright light sources (lights, head lamps and the like);
– look into objective lens / (figure 3) with the cut-in illuminator from the distance less than 1.5 m (“Baigish-12A”);
– lay the binocular with the cut-in illuminator on specular reflective surfaces and observe them from the distance less than 1.5 m (“Baigish-12A”);
– apply excessive force while operating the binocular.

2. SPECIFICATIONS

Range of visibility of a human being (full length) at 1/4 Moon starry night, m, tnin	250
Range of visibility of a human being (full length) in total darkness with the use of IR illuminator (“Baigish-12 A”), m, min	75
Magnification	(2,8±0.3)’
Angle of vision	8°
Interpupillary distance setting, mm	from 62 to 72
Diopter setting range, diopter	±4
Time of binocular operation from one battery 6PLF22 “Korund” at a temperature of 20 °C, h, min	15
Time of operation of IR illuminator from one set of elements CLJ-0,18 at a temperature of 20 °C (“Baigish-12A”), h, min	4
Mass of binocular without case, kg, max	1.5
Overall dimensions of binocular “Baigish-12”, mm, max	235x190x97
Overall dimensions of binocular “Baigish-12A”, mm, max	235x190x127

3. STANDARD EQUIPMENT

Description Quantity Night vision binocular “Baigish – ________”	1
IR illuminator*	1
Case	1
Package	1
Operation Manual	1

Remark – Binocular and IR illuminator are completed with power elements by sales organization.
* For binocular “Baigish- 12A”

4. CONSTRUCTION

4.1. The binocular consists of two monoculars connected between each other by means of hinge joint 2 (figure 1).
Each monocular consists of housing 7 arranged inside which are image converter tube (ICT) and voltage multiplier uivuit. objective lens ,V and eyepiece 6 with an eyeshield.
Located in the hinge joint beside the eyepieces are voltage generator and toggle switch 3 used to turn the binocular on/off.
Placed in the hinge joint assembly beside the objective lenses is the battery secured by cap 1.
To protect optical parts from damage, the objective lenses and the eyepieces are closed with covers 9 and 5. Provided in covers 9 of the objective lenses are holes allowing observation under conditions of increased illumination (in the dusk).
For convenience of observation and transport there is strap 4. The IR illuminator (figure 3) consists of objective lens 1 and housing 2 installed in which are power elements 4 closed with cover 3.
The IR illuminator is turned on/off with the help of switch 5.
By means of a “dovetail” IR illuminator 2 (figure 2) is mounted on plate 3 and tightened with nut 6 (figure 3).
To carry and store the binocular in inoperative condition, provision is made for a case.

5. PREPARATION FOR OPERATION

5.1. Fit the battery in the binocular in the following way:
– unscrew cap 1 (figure 1);
– fit in the battery observing proper polarity;
– screw up cap 1.
Fit the battery in the IR illuminator in the following way:
– unscrew cover 3 (figure 3) closing power elements;
– fit in power elements (2 pcs) observing proper polarity;
– screw up the power compartment cover.
Prior to beginning observation, do the following:
– make sure that there are no intense light sources within the observation sector planned;
– remove the cover from the eyepieces;
– remove the covers from the objective lenses (in the dusk do not remove the covers);
– turn on the binocular by placing toggle switch 3 (figure 1) in the ON position;
– turn on the IR illuminator (“Baigish-12A”) by placing switch 5 (figure 3) in the ON position;
– set the eyepieces interpupillary distance;
– rotate the eyepieces to obtain a sharp image of the object.
Flashing and blinking may occur on the screen within 30 s upon turning on the binocular. On finishing observation:
– turn off the binocular. Bear in mind that the screen continues glowing long enough upon cutting out the power;
– turn off the IR illuminator (“Baigish-12A”) by placing switch 5 in the OFF position;
– close the objective lenses and the eyepieces with the covers;
– loosen nut 6 and remove the IR illuminator from the binocular (“Baigish-12A”);
– place the IR illuminator in the case (“Baigish-12A”);
– place the binocular in the case.
Dark points and spots caused by the image converter operation, which may be visible in the binocular field of view, are not considered to be a malfunction. Number of points and the screen luminescence intensity in each monocular may be different.

6. MAINTENANCE AND STORAGE RULES

6.1. Keep the binocular clean and protect it against sharp impacts and moisture.
Remove dust from optical surfaces with a dry cloth. To remove greasy stains, use a cloth slightly moistened with alcohol or ether.
Store the binocular in the case in dry heated premises.