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

Technical Specifications

Parameter	Specification
Wavelength	1064 nm
Range (Ranging)	≥ 10,000 m
Weight	≤ 680 g
Dimensions	116 mm × 52 mm × 96 mm

TECHNICAL SPECIFICATIONS

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.

OUTLINE DIMENSION(mm)

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

PIN INTERFACE

Electrical Interface

One full-duplex RS-422 interface; signal levels and drive capability comply with the RS-422 interface standard.
One I/O interface (for controlling the laser rangefinder / designator power on/off).
One external synchronization control signal.

Interface definition:

The cable outlet direction of the connector is parallel to the length direction (rearward cable exit).
Connector model on the laser rangefinder side: J30J-15ZKP;
Mating plug model on the electro-optical system side: J30J-15TJL (WL150A4).

Table — Electrical Interface Definition

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 (-)	Input/Output		I/O 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 (–)	Input

Product Description

LDR80K1 80 mJ 1064 nm Laser Target Designator/Rangefinder Module

The LDR80K1 is an 80 mJ, 1.064 μm laser target designator and rangefinder module designed for airborne platforms and other mission-critical electro-optical systems that require high reliability and long-range engagement. It combines distance measurement and coded laser designation in a compact housing with low weight, long stand-off range, high accuracy and strong environmental robustness, making it ideal for aircraft pods, UAV payloads and vehicle turrets used with laser-guided artillery shells and precision munitions.

The module uses a laser-diode-array–pumped solid-state laser at 1064 nm and delivers an average single-pulse energy of at least 80 mJ per designation cycle, with pulse-to-pulse energy variation within ±10% after stabilization. Beam divergence is ≤ 0.30 mrad, pulse width is 15 ns ± 5 ns, and the optical axis parallelism relative to the mounting reference is held within 0.5 mrad, ensuring a tight and stable spot on target over long distances.

As a rangefinder, the LDR80K1 supports single-shot, 1 Hz and 5 Hz operating modes. The minimum measuring distance is ≤ 300 m, and the maximum measuring distance is ≥ 10 km for a 2.3 m × 2.3 m diffuse target with reflectance ≥ 0.2 under visibility ≥ 23 km and relative humidity ≤ 70%. Ranging accuracy is ≤ 5 m with a correct-range probability of at least 98%. At 5 Hz, the module can operate continuously for 5 minutes, followed by a rest period of no more than 3 minutes before further ranging.

In laser designation mode, the nominal verification pulse rate is 20 pulses per second. Short designation cycles provide 17 s of laser-on time with 30 s intervals and allow up to 8 consecutive cycles, while long designation cycles provide 60 s of illumination with 45 s intervals and up to 4 consecutive cycles. After completing one long and one short designation cycle, the next designation sequence must start within a 30-minute interval, giving the laser head appropriate thermal management and extending service life.

The LDR80K1 supports precise frequency coding that meets weapon-system coding requirements and offers user-programmable code expansion capability. Coding is implemented as precise frequency codes with eight groups of pre-stored period-code patterns, and coding accuracy is better than 2.5 μs. An external synchronization input with RS-422-level differential signaling can control the emission pattern for coding, enabling tight coordination with external fire-control or guidance computers.

Mechanically, the module fits within a footprint of ≤ 116 mm × 52 mm × 96 mm and weighs ≤ 680 g, supporting integration into compact gimbals and pods. Electrically, it operates from a DC 18–32 V input, with average power consumption ≤ 80 W and peak power ≤ 120 W. All internal PCBs receive conformal coating to protect against moisture, salt spray and fungal growth, improving long-term reliability.

A dedicated power-on control signal allows the host system to switch the module on or off independently. The electrical interface is implemented via a J30J-15ZKP connector, with multiple +28 V supply pins, corresponding grounds, differential power-on control, RS-422 RX/TX pairs, RS-422 reference ground, and an external synchronization pair. The RS-422 interface uses 115200 bps, 8 data bits, 1 start bit, 1 stop bit and no parity, with LSB-first transmission for both control commands and status feedback.

For power integration, the LDR80K1 is designed to share supplies with motors or other inductive loads provided certain conditions are met: soft-start (3–5 s) is recommended to avoid large induced over-voltages at switch-on; the designator’s power-on sequence should be staggered after other loads have stabilized; input lines should be isolated from inductive loads, and a DC filter (e.g., 30 V / 10 A) can be added at the module input when conditions permit. The system power supply must meet the peak power requirement; for example, a 24 V test supply should support at least 6 A output current.

Control and monitoring are handled over the serial interface. The module supports commands for single and continuous ranging at 1 Hz and 5 Hz, multiple designation modes (short, long and single/continuous illumination), range-gating, laser code configuration and query, total pulse-count query and stop commands. During ranging or designation, each laser pulse returns one set of distance data and status information. Designation commands have priority; a designation command will interrupt continuous ranging, and while designation is in progress, only the stop-designation command is accepted. The unit keeps a non-volatile record of cumulative laser pulses, supports power-on, periodic and start-up self-tests, reports fault codes, monitors internal temperature and outputs temperature alarms. A “ready” status frame is transmitted at 10-second intervals after initialization, and all messages include checksum verification for robust communication.

Environmentally, the LDR80K1 is specified for operation from −40 °C to +55 °C and storage from −45 °C to +65 °C. It withstands sinusoidal vibration from 15–33 Hz at 0.91 mm amplitude and from 33–700 Hz at 2 g in three orthogonal axes for 1 hour per axis, as well as 10 g shocks along vertical, lateral and longitudinal directions with 11 ms post-peak sawtooth waveforms. The unit is powered on during these tests and must function normally afterward, ensuring suitability for aircraft take-off/landing vibration and vehicle transport environments.

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

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