Technical Specifications
|
Operating modes
|
Ranging, designation
|
|
Pump source
|
Diode array
|
|
Operating wavelength
|
1.064 μm (1064 nm)
|
|
Pulse energy
|
≥ 20 mJ
|
|
Pulse energy stability
|
Within a single designation cycle, single-pulse energy deviation ≤ ±10% (after 2 s of emission)
|
|
Beam divergence
|
≤ 0.6 mrad
|
|
Pulse width
|
10 ns ± 5 ns
|
|
Laser optical-axis stability
|
≤ 0.05 mrad
|
|
Ranging performance
|
|
Ranging frequency
|
1 Hz / 5 Hz / single-shot
|
|
Continuous ranging
|
1 Hz: ≥ 5 min; 5 Hz: ≥ 1 min
|
|
Measurement range
|
300 m to ≥ 3,000 m (vehicle-sized target)
|
|
Ranging accuracy
|
±1 m
|
|
Detection rate
|
≥ 98%
|
|
Dimensions
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≤ 92 mm × 67 mm × 53 mm
|
|
Weight
|
≤ 290 g
|
|
Designation performance
|
|
Laser code accuracy
|
≤ ±2.5 μs
|
|
Designation frequency
|
20 Hz fundamental (supports user-defined coding)
|
|
Environmental Adaptability
|
|
Operating temp
|
–40°C to +55°C
|
|
Storage temp
|
–45°C to +70°C
|
OUTLINE DIMENSION
≤92mm×67mm×53mm
PIN INTERFACE
Communication Interface: RS422.
Connector model and interface definition:
Socket: MOLEX 53048-0810
Matching plug: MOLEX 51021-0800
| Pin No. |
Signal Name |
Description |
|
1
|
Vin
|
Power supply +(24V)
|
|
2
|
Vin
|
Power supply +(24V)
|
|
3
|
GND
|
Power return (–)
|
|
4
|
GND
|
Power return (–)
|
|
5
|
RX1+
|
Host Computer -> Laser Range & Illumination Unit (422-RX+)
|
|
6
|
RX1-
|
Host Computer -> Laser Range & Illumination Unit (422-RX-)
|
|
7
|
TX1-
|
Laser Range & Illumination Unit -> Host Computer (422-TX-)
|
|
8
|
TX1+
|
Laser Range & Illumination Unit -> Host Computer (422-TX+)
|
|
External Trigger
|
|
1
|
TBI
|
External Trigger + (Rising edge trigger)
|
|
2
|
TBG
|
External Trigger -
|
Product Description
LDR20K1 20 mJ 1064 nm Laser Rangefinder & Target Designator
The LDR20K1 is an ultra-compact and lightweight 20 mJ laser target designator module designed for small UAV gimbals and portable targeting and observation systems. It integrates high-precision 1064nm ranging and coded designation into a module weighing less than 290 g.
Despite its small size, the LDR20K1 offers a measurement range up to 3 km and precise frequency coding for laser-guided precision systems. Its RS-422 interface and rugged construction ensure reliable performance in airborne and mobile ground environments.
The module supports full-featured interactive control with the host computer via serial interface, including start/stop of ranging and laser illumination, range gate configuration, working mode switching and laser coding setup. It outputs distance data and complete device status information synchronously after each ranging and illumination pulse. The device integrates power-on self-test, periodic self-test and on-demand manual self-test functions, and is capable of recording cumulative laser pulse counts. With real-time response to external commands and refined status reporting, the module simplifies system integration and supports full-lifecycle equipment health monitoring.
In ranging mode, the LDR20K1 supports 1 Hz continuous ranging, 5 Hz continuous ranging and single-shot ranging. The continuous ranging duration is 5 minutes at 1 Hz and 1 minute at 5 Hz, with automatic shutdown triggered if no stop command is received. A 1-minute resting interval is required before resuming operation after continuous ranging. Optimized for conventional target detection, the module provides a minimum ranging distance of ≤300 m and a maximum ranging distance of ≥3000 m, with a ranging accuracy of ±1 m and a target acquisition rate of no less than 98%. Both first-target and last-target ranging logic are available to ensure stable detection under complex backgrounds and partially obscured target conditions.
In laser designation mode, the module operates at a 1064 nm wavelength with a standard base frequency of 20 Hz and a coding accuracy better than 2.5 μs, fully complying with weapon system interface specifications. It is preconfigured with eight sets of high-precision periodic codes and supports user-defined code expansion. The module is equipped with an external synchronous signal receiving capability to synchronize laser emission timing via external trigger signals. Two standard illumination cycle modes are supported. The short-cycle mode allows 8 consecutive illumination cycles, with single illumination duration ≥20 s and cycle interval ≤30 s. The long-cycle mode allows 2 consecutive illumination cycles, with single duration ≥47 s and cycle interval ≤30 s. A minimum idle interval of 30 minutes is required before restarting continuous illumination after a full cycle sequence, effectively protecting the laser source and ensuring long-term operational stability.
Mechanically, the LDR20K1 adopts a highly integrated and compact structure, with a maximum envelope dimension of 92 mm × 67 mm × 53 mm and a weight of no more than 290 g. The miniaturized and lightweight design adapts well to limited airborne installation space and reduces platform load. In terms of power supply compatibility, the module accepts 20 V～28 V wide-range DC input, with an average operating power consumption ≤55 W and peak power ≤100 W, fully conforming to standard airborne power supply requirements.
All circuit boards are coated with professional three-proof conformal coating to achieve excellent moisture, mildew and corrosion resistance for harsh operational environments. The module features a wide temperature adaptation range, with an operating temperature of −40 °C to +55 °C and a storage temperature of −45 °C to +70 °C, satisfying stringent airborne environmental standards. It is qualified for airborne flight vibration, takeoff and landing impact, as well as ground transportation mechanical conditions. The unit completes a total of 18 three-axis swept-frequency vibration tests under powered-on state, and maintains full functional integrity and stable performance after all mechanical and environmental assessments.
Featuring compact structure, low power consumption, high ranging precision, stable coded illumination and superior environmental robustness, the LDR20K1 laser ranging and designation module serves as a core high-reliability component for airborne systems. It supports high-precision airborne ranging, laser guidance and battlefield reconnaissance missions, and is an optimal solution for high-reliability airborne laser application systems.
