LDR80K1 Laser Rangefinder &Laser Target Designation

                                                                                     Control Function

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

It can respond to laser ranging and irradiation commands, and can stop ranging and irradiation at any time according to the stop command.

During ranging, distance data and status information are output once for each pulse.

If no stop command is received after starting the 1Hz ranging, it will automatically stop after 5 minutes.

If no stop command is received after starting the 5Hz ranging, it will automatically stop after 5 minutes.

It can set the irradiation time and coding, and can output the selected settings.

It can respond to the laser irradiation command and perform irradiation according to the set mode and coding.

During laser irradiation, the distance value and status information are output once for each pulse.

It gives priority to responding to the irradiation command. During continuous ranging, if an irradiation command is received, the ranging should be stopped and the irradiation command should be responded to immediately. During the execution of the irradiation command, it will not respond to other commands except the stop irradiation command.

It can report the cumulative number of emitted laser pulses (the data will not be lost in case of power failure).

It conducts self-checks (including power-on self-check, periodic self-check, and initiated self-check), and outputs fault codes.

a. Power-on Self-check: (Including high-temperature alarm);
b. Initiated and Periodic Self-check: (Including high-temperature alarm, charging and discharging, laser emitting/non-emitting.)
Note: Since the laser range finder and illuminator can only detect the faults of charging and discharging as well as laser emitting/non-emitting when the laser is being emitted, the power-on self-check does not require the detection of the above two types of faults. During the initiated self-check and periodic self-check, the laser range finder and illuminator reports the detection results from the last irradiation or ranging operation.

It can monitor the temperature and report the current operating temperature to the system.

It provides temperature alarm output.

                                                                                 Parameter Indicators

Pump Source

Laser LD (Laser Diode) Pumping

Cooling Method

Passive cooling, no temperature control

Working Mode

Laser Ranging, Laser irradiation

Operating Wavelength

1064nm±3nm

Pulse Energy

≥80 mJ

Laser Energy Stability

Within a single irradiation cycle, the pulse energy fluctuation does not exceed 10% of the average energy.

Pulse Width

≥15ns±5ns

Beam Divergence Angle

≤0.30 mrad

Stability of The Laser Optical Axis

≤0.05mrad

                                                                                    Ranging performance

Ranging Frequency

1~20 Hz

Continuous Ranging Time

≤300m

Maximum Ranging Distance

≥16 km (Under the conditions of a target with a size of 2.3m×2.3m, a diffuse reflectance coefficient of not less than 0.2, a visibility of not less than 23 km, and a relative humidity of not more than 70%)

Ranging accuracy

±1m.

Successful Ranging Rate

≥98%

Continuous Laser Ranging Time

5min(1Hz)/1min (5Hz)/20S（20hz）

                                                                                    Irradiation performance

Precision of Laser Coding

±1μs

Laser Irradiation Frequency

1~20Hz

Laser Irradiation Distance

≥8000m

Laser Target Designation Cycle

Irradiation center frequency (calibration): 20 pps

Short – duration irradiation mode: The irradiation time for each cycle is 17 seconds, with an interval of 30 seconds. It can perform continuous irradiation for 8 cycles.

Long – duration irradiation mode: The irradiation time for each cycle is 60 seconds, with an interval of 45 seconds. It can perform continuous irradiation for 4 cycles.

                                                                                                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

≤116mm×52mm×96mm

Weight

≤680g

Degree of non-parallelism between the installation reference base and the optical axis

0.5mrad

                                                                                       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

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.

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.

Vibrate in each of the three directions for 1 hour.

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.

After the impact test, the product should operate normally.

Shock Requirements

Vertical axial direction: ≥ 10g,

Horizontal axis direction: ≥ 10g,

Longitudinal axis direction: ≥ 10g;

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.

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.

After the shock test, the product should operate normally.