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In the transmitting channel a laser pulse reflected from the  target goes  through

the protective glass (5), the receiving/sighting channel objective (4),  the  prism

unit (3) and is focused by the objective  in  the  plane of  the  photosensitive  area

of the photoreceiver (2).

The prism unit by its beam-splitting coating applied  to  the  facet of  one of  the

prisms divides a laser pulse  going  through  the  objective into  two  portions.  A

laser pulse at 1.054 

µ

m passes to the photoreceiver, and a visible laser  pulse  is

reflected and focused in the plane of the eyepiece (1) reticule.

The  boresight  includes  the  objective  (4)  and  the  erecting  prism  unit  (3)

integrated with the receiving channel, and the sight eyepiece (1).

The digital display unit consists of two mirrors (12)  transmitting  the  image of

the digital display (11) to the eyepiece, and the display ocular (10).

The rangefinder operates in two modes: ranging mode (the 

MODE 

switch is in

the 

F

  or

  L 

position)  and  control  mode  (the 

MODE 

switch  is  in  the 

C

position)

When operating in  the 

mode,  range measurement to  the  first  target  within

the rangefinder transmitter beam is carried out.

When operating in the 

mode, range measurement to the last target within  the

rangefinder transmitter beam is carried out.

When operating in the 

mode, the  value of minimum  range is  shown  on  the

digital  display.  By  the 

MIN RANGE 

handle a necessary value of  minimum

range is set within 40...4500 m.

3.2.1.    Rangefinder operation  in  ranging  mode  (mode  switch  in  F  or  L

position)

When the 

ON

 switch  is  switched on,  the  storage capacitor is  getting  charged

during 

10 s. When it  is  charged, the  ready indicator lights  (Fig.4),  and then

the storage capacitor is continuously recharged. To measure a range to  a target,

the  rangefinder  cross-hairs  at  the  center  of  the  field  of  view  of  the  sight

eyepiece is  set  on  the  target.  When the  trigger button  is  pressed,  the  storage

capacitor is discharged through the flash lamp of the laser, and a laser pulse  is

generated. The major  portion  of  a laser pulse  is  sent  from  the  output  of  the

transmitting channel of the  rangefinder   to  a target.  At  the  same time  a small

portion of the laser pulse  hits  the  photosensitive  area of  the  photoreceiver and

is  transformed into  an electric start  pulse.  The light  pulse  reflected  from  the

target  is  focused  on  the  photosensitive  area  of  the  photoreceiver  and  is

transformed into an electric stop pulse.  The time  interval meter in  the  display

and control unit  is  started  by  the  electric  start  pulse  from  the  photoreceiver

Содержание EG-LRF 20000

Страница 1: ...EG LRF 20000 technical description and instruction manual ...

Страница 2: ... can measure ranges from 60 to 20 000 m with an accuracy of 5 m The maximum range depends on a target size and shape as well as weather conditions and can exceed 20 000 m in case of good target visibility The solid state laser used in this EG LRF rangefinder is classified as 1 Class of laser hazard and its emission is eye safe for people being within the laser beam The EG LRF 20000 delivery set in...

Страница 3: ...3 Fig 1 EG LRF 20000 rangefinder set 1 Carrying case 2 Rangefinder 3 Accumulator battery 1 3 2 ...

Страница 4: ...mation on range 5 boresight eyepiece 6 digital display ocular 7 ON supply switch 8 external power supply and remote trigger plug 9 MIN RANGE minimum range gate handle 10 battery compartment lid 11 receiving and sighting channel objective 12 transmitting channel objective 1 2 3 4 5 6 7 8 9 10 11 12 ...

Страница 5: ...he following items 1 Supply cable and cable to output information on range 2 Cloth to wipe optical surfaces 3 Silica gel to replace the wet one in the desiccator 2 5 Charger for accumulator batteries The AD 150 VD portable charger is designed to charge Ni Cd battery of 12 V voltage and capacity from 0 5 to 1 0 A h The charger is a stabilized DC source Technical characteristics of the AD 150 VD Mai...

Страница 6: ...es the time between these two pulses and transforms it into the information on range 3 2 Design and operation The rangefinder block diagram is given in Fig 3 The rangefinder consists of the following main parts the transmitting 11 12 13 14 15 and receiving 9 8 7 4 channels the boresight 5 6 7 8 9 the display and control unit 3 The rangefinder optical configuration Fig 4 provides formation of a las...

Страница 7: ...7 ...

Страница 8: ...8 ...

Страница 9: ...ge measurement to the last target within the rangefinder transmitter beam is carried out When operating in the C mode the value of minimum range is shown on the digital display By the MIN RANGE handle a necessary value of minimum range is set within 40 4500 m 3 2 1 Rangefinder operation in ranging mode mode switch in F or L position When the ON switch is switched on the storage capacitor is gettin...

Страница 10: ...be changed from 40 m for the extreme counter clockwise position of the handle to 4500 m for the extreme clockwise position of the handle The accuracy of minimum range setting is 20 m When pressing the START button in the CONTROL mode the control range is measured to check the serviceability of the rangefinder timer In this case there is no laser pulse The START and STOP electrical pulses are forme...

Страница 11: ... a target gated out by the minimum range setting 0 3 5 0 0 M indicator c Digital display readings when the rangefinder detects a signal reflected from an object behind the measured target d Digital display readings when there is no start signal at the photoreceiver input 0 0 0 0 0 e Digital display readings when there is no signal reflected from the target Fig 5 Display of ranging results and rang...

Страница 12: ... of digital display LED indicators observed through eyepiece Multiple target 1 target displayed indica tion of more than 1 target registered Operating mode first last target Minimum range setting m 40 4500 Minimum range setting accuracy m 20 4 3 Sight Magnification 7 5 x Field of view 5 5 Objective diameter mm 43 Range of eyepiece dioptric setting 4 4 4 Power supply Built in battery NiCd 12 V 0 55...

Страница 13: ...sed before the green ready indicator lights measurement will be made with a delay until the green indicator lights 6 if the M indicator multiple target lights carefully examine the target area through the sight eyepiece to identify other targets see Fig 6 For positive identification of all targets the arrangement for minimum range setting can be additionally used as explained in 5 3 7 if the C ind...

Страница 14: ...range in the left eyepiece continuously rotating the MIN RANGE handle set a required value of minimum range set the MODE switch to the F position and measure the range to a target as explained in 5 2 Due to the fact that a portion of the transmitter beam is intercepted by objects in front of a target a signal from the target can be lower than the level of operation of the rangefinder receiver so w...

Страница 15: ...00 Target 3500 m There is a target behind the displayed one 4200 m and a target within the gate 2200 m F 3550 4200 Target 4200 m There is a target within the gate 3500 m L 60 4200 Target 4200 m There is a missed target 3500 m L 2250 4200 Target 4200 m There is a missed target 3500 m and a target within the gate 2200 m Fig 6 Example of ranging with multiple targets ...

Страница 16: ...ance duties preventive maintenance The necessary maintenance of the rangefinder includes execution of the following operations 1 in case of detection of damages faults or performance degradation inform the manufacturer 2 in case of contamination wipe the optical surfaces the housing the control handles of the rangefinder with the cloth from the Accessory set 3 if the silica gel colour changes from...

Страница 17: ... carry out training of the energy storage capacitor of the head supply unit Carry out training in the following manner a shift the supply tumbler of the rangefinder to the ON position b after 10 15 s press and release the start button c repeat the operations according to the clause b until the green readiness indicator on the digital indicator display lights see Fig 5 after that the rangefinder is...

Страница 18: ...the rangefinder to the computer by direct connection to the COM1 3F8h 9 pin port To operate the computer it is necessary connect the computer with the rangefinder by the cable to start the LRF EXE control program on the disk and switch on the rangefinder LRF EXE is the EG LRF rangefinder control program to provide communication of the rangefinder with the IBM PC having the WINDOWS XP operational s...

Страница 19: ...___ Name of parameter Permissible values Actual values Maximum range m no less 10 000 Minimum range m no more 60 Minimum range setting m 40 4500 Time of rangefinder readiness for measurement s no more 6 The product conforms with the technical requirements and is fit for operation Supplier Laseroptronix Enhagsslingan 23 187 409 Täby Sweden ...

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