Transcript Document

TV Optical Head
Description
:
TV Optical Head
GIG No.
:
348479
Sec Ref No.
:
810PGW
Part No.
:
G-3435818
Cost
:
Rs. 10, 92, 720/-(Assessed)
7B/PECHORA/SNR-125/PR/01/06-11 Qty-07
(1st & 2nd line servicing requirement)
COMPOSITION OF TV OPTICAL TRACKER
TV optical tracker used in Pechora (MGR) is comprised
of the following components:
(a)
Optical section (Optical head)
(b)
Light to signal converter (vidicon tube)
(c)
Video channel
(d)
Signal to light converter (picture tube )
(e)
Scanning devices &
(f)
Synchronizing device
FUNCTION OF THE ITEM
To enhance the operational capability of Pechora
(MGR) under anti radiation missile attack and EW
environment, Pechora MGR has been provided with
facility for optical tracking of the target.
LOCATION ON THE MAJOR ASSEMBLY
TV camera is located on the YHB post
And
display units in the cabin.
ROLE IT PLAYS
TV optical system is intended for observations
of remote objects and determination of their
angular co-ordinates. There are two types of
CC TV namely 9 Sha 33 A and 9 Sha 38-1
used in Pechora MGR. 9 Sha 38-1 TV optical
tracking system is also used in OSA-AK &
SPAGU weapon system of Army.
LOAD IT TAKES
220 V±5%,
±27V±10%
400Hz±2.5%
Power Consumption:Max 450VA for 220V 400Hz mains
Max 200W for 27V mains
THE EFFECTS OF ITS FAILURE
During Anti Radiation Missile attack
and EW environment the target can
not be tracked without the help of TV
system.
ASPECTS THAT MAKE IT
NON-FEASIBLE/COMPLEX OR DIFFICULT
FOR INDIGENISATION
Adaptability to the existing Radar system and
availability of a system which has night/ IR
capability and limitations of tracking range.
TECHNICAL AND FUNCTIONAL
SPECIFICATIONS
SL
No
CHARACTERISTICS
SPECIFICATIONS
a. Temperature range:-
-40 deg C to + 50 deg
C
b. Relative humidity
95 to 98 % at a
temperature of +20
deg C ± 2 deg C
c. Field of vision angle
Narrow - 1°27’ x 1°5’
Wide
d. Vertical resolution
- 4°50’ x 3°38’
At centre – 500 lines
At corner – 450 lines
REMARKS
Area covered in
space will be
1°27’x 1°5’
Area covered in
space will be
4°50’ x 3°38’
It is a distinction
between rasters
in the test chart
at centre which is
500 lines and at
corner 450 lines
to give a clear
SL
No
CHARACTERISTICS
SPECIFICATIONS
REMARKS
e. Horizontal resolution
At centre – 600
lines
At corner – 500
lines
It is a distinction
between rasters in
the test chart at
centre ,which is 600
lines and at corner
500 lines to give a
clear display
f. Warm up time
03 minutes
It is to provide
sufficient warming up
time after application
of filament voltages
to vidicon and CRT
before the
application of high
voltages at their
respective electrodes
and thus increase
the life of vidicon and
SL
No
CHARACTERISTICS
SPECIFICATIONS
g. Permissible continuous 12 hours
operation
h. Magnification factor
j. Maximum distance
between the centre of
cross line and test
chart on monitor
screen
Narrow – F =
500mm – 14.75
Wide - F =
150mm – 4.4
15 mm
REMARKS
Parameters
may get
deviated if
operated
continuously
beyond 12
hours
SL
No
CHARACTERISTICS
SPECIFICATIONS
k.
Adjustment of TV
(a)In horizontal
camera with respect to direction - ± 2°
the mounting flat
(b)In vertical
direction - ± 2°
l.
Supply voltage
220 v ± 5% , 400
Hz ± 2.5 %
± 27 V ± 10%
Power consumption
Max 450 VA for 220
V 400Hz
Max 200 W for 27 V
mains
m.
REMARKS
Mechanical
adjustment for
TV allignment
LIMITATIONS
TV camera can not be operated during night
due to its limitations which affects the
operational capability of the squadron during
night in case under ARM attack and EW
environment.
FEATURES TO BE IMPROVED
(a) Existing Range and field of vision of
angle needs to be improved.
(b) Resolution needs to be improved.
(c) Night operation facility needs to
be incorporated.
(d) Operating temperature range, relative
humidity and continuous operation limit
should be at least as per existing system.
FUTURE REQUIREMENTS
If night operation facility can be successfully
incorporated, the complete Pechora & OSAKA fleet will require the new system.
Considering the number of FUs of Pechora
and OSA-AK, the requirement may be 50
No.s of cameras.
FILTER & TEST CHART CHANGE OVER ASSEMBLY
CIRCUIT OF TV OPTICAL HEAD
MAIN LENS
MAIN LENS
BLOCK OF PRISM
MAGNIFICATION CHANGE OVER ASSEMBLY
COVER OPENING MECHANISM
OUTLINE OF TV CAMERA
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