LDR20K1 Laser Rangefinder & Laser Target Designator

                                                                                       Control Function

The laser target indicator can achieve the following control functions through the serial interface.

1. Respond to the laser ranging command and be able to stop the ranging operation at any time according to the stop command.

2. Output distance data and status information once for each pulse during the ranging process.

3. The ranging function has a range gating feature

4. After starting continuous ranging, if no stop command is received, the ranging will automatically stop after 5 minutes (at a frequency of 1Hz) / 1 minute (at a frequency of 5Hz).

5. It is possible to set the illumination mode and encoding

6. Respond to the laser target indication command, perform target indication according to the set mode, encoding, and target, and be able to stop the target indication at any time according to the stop command.

7. After starting the target indication, if no stop command is received, the target indication will automatically stop after one cycle.

8. Output the distance value and status information once for each pulse during the laser target indication.

9. Conduct power-on self-check and periodic self-check and output status information.

10. Respond to the self-check activation command and output status information.

11. Be able to report the cumulative number of laser pulses.

                                                                                     Parameter Indicators

Pump Source

Laser LD (Laser Diode) Pumping

Cooling Method

Passive cooling, no temperature control

Working Mode

Ranging, target indication

Operating Wavelength

1.064μm

Pulse Energy

≥20 mJ

Laser Energy Stability

Within one target indication cycle, the fluctuation of the single-pulse energy does not exceed 10% of the average energy (statistical data is collected 2 seconds after the light is emitted).

Pulse Width

≥15 ns±5ns

Beam Divergence Angle

≤0.6mrad

Stability of The Laser Optical Axis

≤0.05mrad

                                                                                       Ranging performance

Ranging frequency

1~20Hz

Continuous Laser Ranging Time

5min(1Hz)/1min (5Hz)/20S（20hz）

Minimum measuring distance

≤ 300m.

Maximum measuring distance

≥ 5000m(Visibility: 13.5 km, target reflectivity: 0.2, target size:

2.3 m × 4.6 m)

Ranging accuracy

±1m.

Rate of successful measurement

98%.

Ranging logic

first and last target.

                                                                                         Irradiation performance

Precision of laser coding

≤1μs

Laser Irradiation Frequency

1~20Hz

Laser Irradiation Distance

≥ 2 km

Laser Target Designation Cycle

1. Short-cycle Target Designation:
The duration of a single target designation shall not be less than 20 seconds, and the interval shall not be more than 30 seconds. Conduct continuous target designations for 8 cycles.

2. Long-period Target Indication:
The duration of a single target indication is not less than 47 seconds. When starting the target indication again, the interval shall not be greater than 30 seconds, and it is capable of continuous target indication for 2 cycles.
After the end of one target indication cycle, the time interval for starting the continuous target indication again shall not be less than 30 minutes.

                                                                                                  Laser Coding

It complies with the requirements of MIL-STD-810G standard and has the expandable capability of user self-coding.

It has the ability to receive external synchronous signals and encodes by controlling the laser beam emitting mode through external signals.

Coding method: Precise frequency code (encoded with eight groups of pre-stored periodic codes).

                                                                                              Dimensions and Weight

External Dimension Envelope

≤92mm×67mm×53mm

Weight

≤290g

                                                                                      Input Power Supply Requirements

During operation, the average power consumption is not more than 55W, and the peak power consumption is not more than 100W.

The operating voltage range is from 20V ~ 28V.

                                                                               Three-proofing for Electrical Components

After the circuit board is designed and debugged, it is coated with three-proofing paint for “three-proofing” treatment.

                                                                                Environmental adaptability requirements

High Temperature

Operating temperature

≤ +55°C

Storage temperature range

≥ -40°C

Low Temperature

Operating temperature

≥ -40°C

Storage temperature range

≥ -45°C

Vibration Requirements

1. It can withstand the flight vibration as well as the impacts during takeoff and landing, and all equipment can withstand the environmental conditions of automobile transportation.

2. The vibration is in the form of a swept frequency spectrum. From 15Hz to 33Hz, it is a sinusoidal vibration with equal displacement, and the displacement magnitude is 0.91mm; from 33Hz to 700Hz, it is a sinusoidal vibration with equal acceleration, and the acceleration is 2g.

3. Vibrate in each of the three directions for 1 hour.

4. Specimen Status: The product is placed on the test bench in the normal operating state for the impact test, and the product is powered on.

5. After the impact test, the product should operate normally.

Shock Requirements

1. Vertical axial direction: ≥ 10g,

2. Horizontal axis direction: ≥ 10g,

3. Longitudinal axis direction: ≥ 10g;

4. Post-peak sawtooth wave with a duration of 11ms. For the X, Y, and Z axes, in two directions of each axis, once for each direction, a total of 18 times.

5. Specimen Status: The product is placed on the test bench in the normal use state for the shock test, and the product is powered on.