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1570nm 40km Laser Rangefinder Module

The LSP-LRE-4020A remote laser ranging module is developed based on the 1570nm OPO laser independently researched and developed by Lumimetric. Its wavelength is far from the working band of laser weapons, which holds significant importance in specialized application fields. The product employs a single-pulse time-of-flight ranging method, capable of reaching targets such as large aircraft up to 40km away, with an operating frequency of over 20Hz.

This ranging module product features complete domestic production and operates in an eye-safe wavelength band, making it suitable for use in various model projects.

Technical Datasheet

Main Function

a) Single and continuous ranging;

b) Distance gating and target indication;

c) Self-check functionality.

Working Distance A≥40kmVisibility ≥60km, for large aircraft (wingspan 50m) with reflectivity >20%, humidity ≤80%.
Working Distance B≥16kmVisibility ≥23.5km, for small aircraft (2m²), reflectivity >20%, humidity ≤80%.
Divergence Angle≥0.6 mradCustomizable
Continuous Ranging Frequency1-20Hz AdjCustomizable
Ranging Precision±5mCustomizable
Accuracy Rate≥98%
Min. Ranging Distance≤500 mCustomizable
Distance Resolution≤50m
Power Supply
Power Comsumption
Ave.≤200W,Peak ≤500W
Working Temp.
Storage Temp.
Communication type


• The laser emitted by this ranging module is a 1535nm laser that is safe for human eyes. Although it is within the eye-safe wavelength range, it is advised not to look directly into the laser beam.

• When adjusting the parallelism of the three optical axes, be sure to cover the receiving lens. Failure to do so may result in permanent damage to the detector due to excessively strong return signals.

• This range-finding module is not airtight. Ensure that the relative humidity of the operating environment is below 80% and that the environment is clean and hygienic to prevent damage to the laser.

• The measuring range of the ranging module depends on atmospheric visibility and the nature of the target. Range measurements will be reduced in fog, rain, and sandstorm conditions. Targets like clusters of green leaves, white walls, and exposed limestone have a higher reflectivity, which can increase the measuring range. Additionally, the range decreases as the angle of the laser beam to the target increases.

• It is strictly forbidden to emit lasers at highly reflective targets such as glass or white walls within 20 meters, as strong reflections may cause damage to the APD detector.

• Do not plug or unplug cables while the device is powered on. Ensure that the power supply polarity is connected correctly to avoid permanent damage to the equipment.