DESCRIPTION
The LRF0818C-02 Mini Laser Rangefinder Module is a small-sized, high-accuracy optoelectronic device tailored for professional distance measurement scenarios. It works with an eye-safe 1535 nm wavelength, sending out laser pulses to a target and computing the distance based on the time-of-flight (TOF) mechanism.
TECHNICAL SPECIFICATIONS
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Parameter
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Specification
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Operating wavelength
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1535 nm ± 10 nm
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Eye safety
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Class Ⅰ
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Applicable standards
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MIL-STD-810G
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Transmitting aperture
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Φ12 mm
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Receiving aperture
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Φ26 mm
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Maximum range
Under visibility ≥ 12 km and relative humidity ≤ 60%, tested against a 0.3-reflectivity panel (or equivalent target)
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Vehicle (2.3 m × 4.6 m): ≥ 8000 m
Human (0.5 m × 1.7 m): ≥ 4500 m
UAV (0.2 m × 0.3 m): ≥ 2600 m
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Minimum range
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≤ 20 m
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Range accuracy
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≤ ±2 m
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Ranging rate
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Single shot, 1 Hz, 2 Hz, 3 Hz, 4 Hz, 5 Hz, 10 Hz
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Beam divergence
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≤ 0.4 mrad
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Operating temperature
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−40 °C to +60 °C
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Storage temperature
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−50 °C to +70 °C (to be qualified at the system level)
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Vibration
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5→50→5 Hz sweep, 1 octave/min, 2.5 g (system-level qualification)
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Shock
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1200 g, 1 ms (system-level qualification)
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Overall dimensions
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≤ 59.5 mm × 26 mm × 32 mm
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Weight
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≤ 65 g
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Communication interface
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TTL
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Supply voltage
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4.5 V–16 V
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Power consumption
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Standby ≤ 1 mW;
Operating ≤ 4 W;
Peak ≤ 14 W @ 12 V
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Structural dimensions

Overall dimensions: ≤ 59.5 mm × 26 mm × 32 mm
Figure — Mechanical and Opto-Mechanical Interface Diagram
ELECTRICAL INTERFACE
a) Supply voltage:5 V–16 V
b) Power consumption:standby ≤ 1 mW; operating ≤ 4 W; peak ≤ 14 W @ 12 V
c) The host computer connects to the rangefinder via a 6-pin connector for interface and testing.
The pin assignment of the rangefinder’s power and communication port is shown in Table 1.
Table 1 — Pin assignment of the rangefinder power and communication port
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Pin #
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Pin No.
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Remarks
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P-1
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VIN+
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Power input, 4.5–16 V
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P-2
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VIN-
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Power ground (GND)
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P-3
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POWER_ON
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Module power enable (TTL, 3.3 V logic level); Module ON (> 2.7 V), module OFF (< 0.3 V)
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P-4
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UART_TX
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UART TXD (serial transmit), TTL, 3.3 V logic level
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P-5
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UART_RX
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UART RXD (serial receive), TTL, 3.3 V logic level
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P-6
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GND
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Serial ground (SGND)
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Connector Pin 1 Location