LDR25K1 Laser Rangefinder &Laser Irradiation

                                                                                       Control Function

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

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

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

The ranging function has a range gating feature

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).

It is possible to set the illumination mode and encoding

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.

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

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

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

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

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

≥25mJ

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

≥15ns±5ns

Beam Divergence Angle

≤0.5mrad

Stability of The Laser Optical Axis

≤0.05mrad

                                                                                          Ranging performance

Ranging Frequency

1~20Hz

Continuous Laser Ranging Time

5min(1Hz)/1min (5Hz)/20S（20hz）

Continuous Ranging Time

≤120m

Maximum Ranging Distance

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

2.3 m × 2.3 m)

Ranging Accuracy

±2m

Successful Ranging Rate

≥98%

Ranging Logic

First and Last Targets

                                                                                             Irradiation performance

precision of laser coding

±1μs

Fundamental Frequency Of The Laser Target Designation Frequency

20Hz

Laser Irradiation Distance

≥2000m

Laser Target Designation Cycle

Short-cycle Target Designation:

The duration of a single target designation shall not be more than 20 seconds, and the interval shall not be less than 30 seconds. Conduct continuous target designations for 8 cycles.

Long-period Target Indication:

The duration of a single target indication is not more than 47 seconds. When starting the target indication again, the interval shall not be less  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

≤68mm×52mm×90mm

Weight

≤380g

                                                                                        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.