Detailed LR120K1 Specifications
The technical material below is retained for this model only. Do not transfer a range, pulse, interface, mechanical or safety value from another 1064 nm product.
TECHNICAL SPECIFICATIONS
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Functional Characteristics |
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Provides laser ranging capability |
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Supports long-cycle laser designator, short-cycle laser designator, and emergency laser designator modes. |
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Includes built-in fixed frequency codes and supports online coding |
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Supports receiver detector lockout via command control; the receiver is locked by default at power-on. |
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Provides product temperature reporting. |
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Supports both internal trigger and external trigger operating modes. |
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Supports querying the laser emission count (cumulative count). |
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Provides energy adjustment capability for product maintenance. |
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Performance Parameters |
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Operating wavelength |
1064 nm ± 3 nm |
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Energy (minimum) |
≥ 120 mJ |
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Energy levels |
50 mJ, 80 mJ, 120 mJ |
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Energy ranges per level |
l 50–70 mJ l 80–100 mJ l ≥ 120 mJ |
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Energy stability |
≤ ±10% per cycle (calculated after 2 s of laser designator) |
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Effective range (large target) Laser ranging: |
a) ≥ 30 km (conditions: visibility ≥ 45 km, target reflectivity 0.2, relative humidity ≤ 80%) |
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Ranging accuracy |
± 1 m |
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Repetition rate |
Laser ranging: 1 Hz, 5 Hz laser designator: 20 Hz |
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Valid measurement rate |
≥ 98% |
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Pulse width |
15 ns ± 5 ns |
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Beam divergence |
≤ 0.15 mrad |
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Optical axis parallelism |
Parallelism between mounting datum plane and optical axis ≤ 0.3 mrad |
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Operating modes |
a) Laser ranging: continuous operation ≥ 10 min, rest 5 min |
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Laser designator coding |
a) 16 coding patterns |
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Weight Requirements |
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Total unit weight |
≤ 2 kg |
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Weight consistency |
≤ 50 g |
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Structural Requirements |
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Overall dimensions |
≤ 75 mm (W) × 90 mm (H) × 220 mm (L) |
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3D digital model requirements |
The external model shall be complete and comprehensive, including details such as screws, cable routing, and mating connectors. |
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Load cable routing shall be included in the model design to avoid interference with the system. |
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Electrical Interface |
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DC input |
18 V–32 V, typical supply 28 V |
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Average power consumption |
≤ 120 W @ 28 V |
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Peak power consumption |
≤ 200 W @ 28 V |
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Power-on inrush current |
≤ 5 A @ 28 V |
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Digital ground, power ground, and mechanical housing shall be electrically isolated. |
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Environmental Adaptability Requirements |
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Operating Temperature |
−40 °C to +60 °C |
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−40 °C to +60 °C |
−45 °C to +65 °C |
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Vibration |
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Equipment vibration testing shall be conducted in accordance with MIL-STD-810G, Laboratory Environmental Test Methods for Military Equipment. |
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Vibration conditions |
8.2 Hz – 86.4 Hz: 0.1 g²/Hz 156.4 Hz – 172.8 Hz: 0.025 g²/Hz 234.6 Hz – 259.2 Hz: 0.006 g²/Hz Other frequency points within 15 Hz – 2000 Hz: acceleration spectral density of 0.004 g²/Hz Vibration shall be applied along the X, Y, and Z axes, 15 minutes per axis. |
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Shock |
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Vertical axis |
≥ 20 g |
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Lateral and longitudinal axes |
≥ 15 g |
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Pulse duration |
11 ms |
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3 axes, 2 directions per axis, 18 shocks in total |
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Shock testing shall be conducted in accordance with MIL-STD-810G, Laboratory Environmental Test Methods for Military Equipment. |
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OUTLINE DIMENSION(mm)
PIN INTERFACE
A standard isolated RS-422 communication interface is provided.
Interface chip model: SMUM2682MP.
A standard isolated CAN 2.0B bus communication interface is provided, with a transmission rate greater than 1 Mbps.
CAN transceiver chip model: SMUM3053MP or ADM3053.
No bus termination resistor is included.
Firmware upgrade can be implemented via the CAN interface (CAN protocol to be defined).
Firmware upgrade can also be implemented via the serial interface.
Laser target designator connector: Receptacle J106-4H14ZKSP-02
Electro-optical platform mating plug: Plug J106-4H14TJSL-01
Connector manufacturer: Guihang
Table 1 — Connector Pin Assignment Description
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Pin |
Definition |
Description |
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A1 |
+28 V Input Power |
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A2 |
+28 V Input Ground |
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4 |
Designator Serial TX+ (from designator to EO platform +) |
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11 |
Designator Serial RX− (from EO platform to designator −) |
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9 |
Designator Serial TX− (from designator to EO platform −) |
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2 |
Designator Serial RX+ (from EO platform to designator +) |
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8 |
Designator Serial Ground |
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14 |
External Sync RS-422 RX+ |
RS-422 level input |
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12 |
External Sync RS-422 RX− |
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13 |
External Sync RS-422 GND |
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5 |
CAN H |
Isolated CAN 2.0B, 1 Mbps, no termination resistor installed |
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6 |
CAN L |
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7 |
CAN GND |
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B1 |
Laser Designation Sync Signal Output TX+ |
RS-422 level output, active low, pulse width 10 μs |
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B2 |
Laser Designation Sync Signal Output TX− |
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3 |
Laser Designation Sync Signal Output GND |
Model-specific conditions and limits
Conditions are retained only when the source states them. They are not reconstructed from a nominal range or wavelength.
Read the controlled model table for its stated target, reflectance, visibility, temperature, rate and acceptance conditions. No additional condition has been inferred for this model.
Pulsed Time-of-Flight Ranging
A pulsed rangefinder estimates one-way distance from the round-trip delay of an accepted optical return. The equation is general engineering context, not an additional LR120K1 specification.
Pulse energy describes emitted energy per pulse; its effect cannot be separated from pulse width, divergence, optical losses, receiver threshold and the stated target/atmosphere conditions. It is not a substitute for a model-specific near- or long-range acceptance test.
Source-stated application context
Application labels indicate evaluation context, not automatic fitness for a finished system.
The controlled LR120K1 PDF describes artillery fire support, laser-guided munitions, and vehicle- or shipborne EO/IR platforms.
This context is bound only to the controlled LR120K1 document; end-system suitability and acceptance remain subject to engineering review.
Confirm short- and long-distance acceptance conditions
- Define minimum distance, target material, reflectance, size and incidence angle.
- Check receiver recovery, optical-axis overlap and strong-return handling at the intended near limit.
- Verify supply tolerance, peak current, grounding, interface levels, connector and timing with the ordered revision.
- For long-distance acceptance, state target geometry, visibility, weather, background and required detection probability.
- Test with the installed window, boresight, field of view, enclosure and thermal path rather than a bare module alone.
- Evaluate accessible emission, labels and failure conditions again for the finished laser product under IEC 60825-1.
Questions to resolve before design release
Does a stated maximum range apply to every target?
No. A stated range must be read with its target and environmental conditions. Dark, small, oblique, wet or partially obscured targets and degraded visibility can reduce received signal.
Does 1064 nm itself establish the laser classification?
No. Classification concerns accessible emission from the finished laser product. The module statement and final instrument assessment are distinct.
Can a long-range claim be used as the minimum range?
No. Minimum-distance behaviour depends on the particular transmit/receive geometry, receiver timing and strong-return management documented for the model and host system.
Product evidence and general technical context
The model PDF controls model claims. Public references below explain general engineering principles only.
- ERDI LR120K1 model PDFModel-specific technical evidence.
- System Design of a Pulsed Laser RangefinderOptical Engineering 30(3), 1991 - link budget, background, noise, detection and range error.
- The Short-Range, High-Accuracy Compact Pulsed Laser Ranging SystemSensors 22(6), 2146, 2022 - pulsed-ToF equation, timing error, reflectivity and temperature effects.
- Laser system range calculations and the Lambert W functionApplied Optics 48(4), B1-B7, 2009 - range performance versus atmospheric transmission, target and system parameters, and threshold SNR; its 1.06 µm example is general context, not ERDI model data.
- Monostatic all-fiber rangefinder systemApplied Optics 54(25), 7687-7694, 2015 - a measured case study of shared-aperture geometry and receiver-recovery loss; it does not establish an ERDI model limit.
- Light Transmission in Fog: The Influence of Wavelength on the Extinction CoefficientApplied Sciences 9(14), 2843, 2019 - measured and modeled wavelength-dependent fog attenuation.
- IEC 60825-1:2014Laser-product classification and accessible-emission requirements; final equipment requires system-level assessment.