The document provides information about a laser range finder (LRF) used in Indian tanks. It discusses the main parts of the LRF system, including the range measuring unit, range input unit, block-D, gyrostabilizer, and laser. The range measuring unit uses time interval counting to determine the distance to a target based on the time it takes a laser pulse to travel to the target and return. Block-D is the laser producing unit and contains components like a collimator, emitter, and receiver. The gyrostabilizer helps keep the tank's barrel stable during motion.

1. A PRESENTATION ON
BY-PURVAPANT
ECE-4TH YEAR
INDUSTRIAL INTERACTION
AT
OPTO ELECTRONICS
FACTORY

2. TABLE OF CONTENTS
• ABOUT OLF
• INDIAN TANKS
• INTRODUCTION
• MAIN PARTS OF TPDK- 1
• RANGE MEASURING UNIT
• RANGE INPUT UNIT
• PRINCIPAL OF RANGE MEASUREMENT BY LASER
• BLOCK-D
• PARTS OF BLOCK –D
• GYROSTABLIZER
• LASER

3. ABOUT OLF
• Part of the Indian Ordinance Organization
• Functions Under The Department Of Defense Production
Of Ministry Of Defense, Government Of India.
• Established to meet the growing demands of armed forces for
better tanks and armored vehicle.
• Olf was awarded ISO-9002 on 16th january,94 from BID, New
Delhi.
• It is only one of its kinds of factory in India, and has Opto
vacuum Coating plant, which is single in Asia.

4. INDIAN TANKS
BHISHMA T-80
AJAY MARK I

5. LASER RANGE FINDER( PART OF TPDK-1)

6. MAIN PARTS OF TPDK -1
 BLOCK D
 RANGE INPUT UNIT
 POWER SUPPLY BLOCK
 RANGE MEASURING UNIT
 ELECTRO BLOCK UNIT
 LASER
 SHOT PERMIT CONTACTS
 RANGE FINDER TRANSRECEIVER
 RANGE FINDER
 HAND AUTOMOTIVE
 STABLIZER
 MECHANISM FOR RANGE CORRECTION INPUT WHEN THE TANK IS IN
MOTION

7. RANGE MEASURING UNIT
 PRINCIPLE USED is Time Interval Counter
 Time interval dt is b/w the moment laser starts
radiating and the moment light pulse is
reflected from the target by the time interval
counter.
 Time interval compromises of a reference
frequency oscillator (15MHz) and an electric
pulse counter of this oscillator.
 The pulse counter is automatically switched
on at the moment the laser starts radiating
and switched off when reflected signal from
the target is received.
FORMULA USED TO DETERMINE RANGE
R=VnT /2

8. RANGE INPUT UNIT
 Range input finder processes the analog
signal from the optically measured distance.
 Controls the motors of the distance correction
device DELTA D
 DELTA D sets the distance measuring scale
and the ballistics cams automatically on the
desired value during distance setting.

9. PRINCIPAL OF RANGE MEASUREMENT BY LASER
 Based on the method of photo or light detecting
and ranging.
 Determination of range is done through
measuring
the time interval for which light impulse passes
the path from sight to target and back.
 Main parts of LRF
a.OPTICAL QUANTUM GENERATOR(LASER)
b.PHOTO RECEIVING DEVICE
c. TIME INTERVAL MEARSURER

10. BLOCK -D
• It is the laser producing unit.
• Has 3 main parts:
i. Collimator
ii. Emitter, and
iii. Receiver

11. PARTS OF BLOCK-D
CAPACITOR POWER SUPPLY UNIT
• DC-DC convertor
• Aim: to produce an i/p of +27V and o/p of+1550V
IGNITION UNIT
• Generates 8-12 KV dc supply for flash of laser lamp.
• Derived by the o/p of +1550V from CPSU.
PULSE AMPLIFIER
• Type of video amplifier.
• Receives and amplifies the single pulse signal, that comes after hitting
the target.
• Can work at temp of -40°c to +50°c and humidity 95-98%.

12. AUTOMATIC BLOCK UNIT
• Works as a comparator
• Compares the i/p signal with feedback signal
of CPSU.
PHOTO DIODE
• Two terminal p-n junction device.
• It converts the light into electric current
• Works under reverse bias
PULSE SENSOR
• Senses the received pulse and sends it to the
pulse amplifier.

13. • Has a STADIA RANGE FINDER TO
THE rescue.
• With distance indicators range 4000-
5000m
• This and manual gun will still work even
if all aiming system have lost power.

14. GYROSTABLIZER
 Used to keep the barrel of the tank even if the tank in is motion.
 Keeps the barrel stable even in heavy jerking.
 Consists of gyro motor, four coils, shot permit contact.

16. RANGE MEASURING UNIT
• Distance of the target is displayed on RMU.
• Calculated by taking the difference b/w start and stop signal.
POWER SUPPLY UNIT
• Provides necessary voltage to various units of LRF.
ELECTRO BLOCK UNIT
• Changes the position and firing range of barrel according to change in position of
the target
HAND AUTOMOTIVE UNIT
• The handle can rotate 180° on either sides thus enabling the barrel of the tank to
rotate 360° without actually turning of the tank.

17. LASER
 Abbreviated as light amplification by stimulated emission of radiation
 Amplified version of unidirectional, monochromatic and coherent
light.
 Types of laser are SOLID,GAS AND LIQUID LASER
 LRF uses solid laser.

18. Problem with optical aperture