DRIVER'S PASSIVE NIGHT PERISCOPE FOR T-55 TANK
The equipment is used by the Driver of T-55. A pair of black head out lamps is also provided with this equipment for mounting externally on the tank for use under adverse condition of ambient illumination and terrain.
 
SYSTEM SPECIFICATIONS :
Magnification 0.9 ± 0.1
Field of View Horizontal 45° ± 1°
Vertical 18° ± 1°
 
OBJECTIVE :
Entrance pupil dia 50 mm
f-number f/1.2
Effective focal length 59.96 mm
 
EYE PIECE :
Type Fixed focal Binocular
Effective focal length 45.8 mm
 
IMAGE INTENSIFIER TUBE :
Micro channel image intensifier inverter tube xx 1332 or equivalent. Resolution (at the centre) 1.5 milliradian under starlight conditions (10-3 lux). Using USAF-1951 Bar target resolution chart of Low Contrast Ratio 1.6 : 1(D-0.20).
 
Power Supply :
Type DC - DC Converter
Input 22 - 30V DC (From Tank supply)
Output 7.2 ± 0.1V DC
Ripple 3%
Weight 6.5 Kgs
 
Dimensions :
Height 380mm
Width 155mm
Depth 135mm
Range 100 M for 'B' type vehicles
 
Environmental specifications :
Operating Temperature - 30° to + 50°C
Storage Temperature Recommended + 20°C
 
Contact :
Marketing & Export Division
Ordnance Factory Board
Ayudh Bhawan
Government of India
Ministry of Defence
10A, S. K. Bose Road, Kolkata – 700 001, India.

Tel: 0091-33-2248 9027 / 2248 2103 / 2248 5077-80
Fax : 0091-33-2248 1748/2210 8235
Mail : ofbtrade@dataone.in
www.ofb.gov.in