L1535 8km Laser Rangefinder Module

KEY FEATURES Small size and lightweight Class I human eye safety standards Stable performance and easy-to-use Provide customization service Distance measurement for vehicle(2.3*2.3m) over 8km Developed based on 1535nm Er: Glass Laser

APPLICATIONS Laser Ranging Targeting Security

Product Description

The ELRF-H25 laser Rangefinder Module is developed based on our self-designed 1535nm erbium laser. It adopts a single-pulse TOF(Time-of-Flight) ranging method, with a maximum measurement range of >10km. The module consists of the laser, transmission optical system, receiving optical system, and control circuit board. It communicates with the host computer via RS422serial port and provides test software and communication protocols for easy secondary development by users. The module features small size, light weight, stable performance, high impact resistance,and is Class 1eye-safe. lt can be applied in handheld vehicle-mounted, and pod-based electro-optical equipment.

Technical Data

Item	Parameter
Eye-Safety Level	Classl
Laser Wavelength	1535±5nm
Laser Beam Divergence	0.3mrad
Receiver Aperture	Φ25mm
Maximum Range	≥10km (large target: building)
	≥8km (vehicle: 2.3m×2.3m)
	≥5.5km (person: 1.7m×0.5m)
Minimum Range	≤30m
Ranging Accuracy	≤±1m
Measurement Frequency	1～10Hz
Range Resolution	≤30m
Probability of Ranging Success	≥98%
False-Alarm Rate	≤1%
Data Interface	RS422 serial,CAN(TTL optional)
Supply Voltage	DC5~28V
Average Power Consumption	≤1.3W @ 5V (1Hz operation)
Peak Power Consumption	≤4W@5V
Stand-by Power Consumption	≤0.2W
Form Factor / Dimensions	≤65mm×46mm×32mm
Weight	≤72g
Operating Temperature	-40℃~+60℃
Storage Temperature	-55℃~+70℃
Impect	>75g@6ms

NOTE:

• 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.