ERDI LDR80K1 1064nm High-Power Laser Target Designator – 80mJ Long-Distance Target Marking System

Operating modes

Ranging and laser designation

Pump source

Laser diode array

Operating wavelength

1.064 μm

Average energy per designation cycle

Average single-pulse energy per designation cycle ≥ 80 mJ

Pulse energy fluctuation

Within one designation cycle, the single-pulse energy variation shall not exceed 10% of the average energy (over the full temperature range, with statistics taken 2 s after laser emission starts).

Beam divergence

≤ 0.30 mrad

Pulse width

15 ns ± 5 ns

Optical axis parallelism error

Parallelism error between the optical axis and the mounting reference: ≤ 0.5 mrad.

Ranging performance

• Minimum measuring distance: ≤ 300 m
• Maximum measuring distance: ≥ 10 km(for a 2.3 m × 2.3 m target with diffuse reflectance ≥ 0.2, visibility ≥ 23 km, and relative humidity ≤ 70%)
• Ranging rates: 1 Hz, 5 Hz, single-shot
• Ranging accuracy: ≤ 5 m
• Probability of correct ranging: ≥ 98%
• Continuous ranging operating time: 5 min(At 5 Hz: continuous operation for 5 min, rest time ≤ 3 min, then ranging can be continued.)

Laser designation performance

• Nominal designation repetition rate (for verification): 20 pps
• Short designation mode: each cycle has 17 s of designation time and 30 s interval; up to 8 consecutive cycles
• Long designation mode: each cycle has 60 s of designation time and 45 s interval; up to 4 consecutive cycles
• After completing one long and one short designation cycle, the interval before the next designation shall be within 30 minutes.

Laser coding

• Meets the weapon system coding requirements and provides user-programmable code expansion capability.
• Supports external synchronization input; the external signal can control the laser emission pattern for coding.
• Coding method: precise frequency code (eight groups of pre-stored period-code patterns).
• Coding accuracy: ≤ 2.5 μs.

Dimensions

≤ 116 mm × 52 mm × 96 mm

Weight

≤ 680 g

Electrical characteristics

• Input voltage: DC 18 V to 32 V
• The electrical and electronic components inside the laser rangefinder/designator are compatible with the system power characteristics.
• Average power: ≤ 80 W; peak power: ≤ 120 W
• After PCB design and debugging are completed, all circuit boards are coated with conformal coating to provide moisture, salt-spray and fungus protection.

External power input requirements

• When sharing the same power supply with motor or other inductive loads, the laser rangefinder/designator should use a soft-start (3–5 s). At the instant of sudden power-on, the induced voltage generated by motors and other inductive loads at the module input may be several times the nominal input voltage, which can cause over-voltage damage.
• During power-up, it is recommended to use the dedicated power-on control function of the laser rangefinder/designator to stagger its power-on time from other loads. After other loads have powered up and stabilized, then enable power to the rangefinder/designator.
• The power input of the laser rangefinder/designator should be isolated from other inductive loads. If conditions allow, a DC filter (30 V / 10 A) can be added at the module’s power input.
• The power supply for the laser rangefinder/designator shall satisfy the peak power demand. When testing the module alone, with a DC supply voltage of 24 V, the supply current should be greater than 6 A. If the output voltage is lower, the rated output current of the supply should be increased accordingly.

Temperature Requirements

High-Temperature Requirements

• Operating temperature: ≤ +55 °C
• Storage temperature: ≤ +65 °C

Low-Temperature Requirements

• Operating temperature: ≥ −40 °C
• Storage temperature: ≥ −45 °C

Vibration Requirements

The equipment shall withstand flight-induced vibration and shocks occurring during takeoff and landing. All components shall also meet the environmental conditions of vehicle transport.

Vibration spectrum:

• From 15 Hz to 33 Hz, constant-displacement sinusoidal vibration with amplitude 0.91 mm;
• From 33 Hz to 700 Hz, constant-acceleration sinusoidal vibration with amplitude 2 g.

Duration: 1 hour per axis in three orthogonal directions (X, Y, Z).

Test conditions:
The product shall be mounted on the vibration platform in its normal operating configuration and powered on during testing.
After vibration testing, the equipment shall operate normally.

Shock Requirements

• Vertical axis: ≥ 10 g
• Lateral axis: ≥ 10 g
• Longitudinal axis: ≥ 10 g
• Shock waveform: post-peak sawtooth, duration 11 ms; applied along X, Y, and Z axes, both directions on each axis, 18 shocks in total.
• Test conditions:
  The product shall be mounted on the shock test platform in its normal operating configuration and powered on during testing.
  After shock testing, the equipment shall operate normally.

Pin No.

Signal Definition

Input/Output

Description

Remarks

1. 

+28V

Input

The power supply characteristics comply with the relevant requirements of MIL-STD-810G.

Power Supply

2. 

+28V

3. 

+28V

4. 

+28V_GND

5. 

+28V_GND

6. 

+28V_GND

7. 

Power-On Control (+)

Input/Output

Refer to the requirements specified in the Power-On Control section.

I/O Control

8. 

Power-On Control (-)

9. 

RS422_RX+

Input/Output

The logic level and drive capability comply with the RS-422 interface standard.
Characteristic impedance: 120 Ω.

The transmit/receive pin definitions correspond to the laser rangefinder itself.

10. 

RS422_RX-

11. 

RS422_TX+

12. 

RS422_TX-

13. 

RS422_GND

14. 

External Synchronization Control Signal

Input

The logic level and drive capability comply with the RS-422 interface standard.

External synchronization signal used to control laser coding.

15. 

External Synchronization Control Signal (–)