Laser Rangefinder Application Note

The laser rangefinder module has the capability to measure a target distance and send the distance information to a host computer. Its compact and lightweight design along with its ease of operation make it a valuable device for efficient measuring. The bonus of its laser source wavelength being in the eye-safe category, making it a worry-free process. Furthermore, this device is customizable to meet your every need.

Operation Principle

The laser rangefinder, as seen in Figures 1 and 2, employs a time of flight principle in which a laser pulse is sent toward the target and the distance is determined based on the total time taken for the pulse to leave the device and get reflected off the target.

Laser Rangefinder 1
Figure 1. Image of Laser Rangefinder
Laser Rangefinder 3
Figure 2. Outline of Laser Rangefinder

The key specifications of the laser rangefinder are listed below in Table 1. We offer a smaller and more compact unit compared to similar products in the market.

Series ModuleGTX2.0GTX4.0GTX8.0
Wavelength1.54μm ± 0.02μm1.54μm ± 0.02μm1.54μm ± 0.02μm
Maximum Working Distance3km6km10km
Minimum Working Distance50m50m50m
Ranging Accuracy±1m±1m±1m
Laser Beam Divergence Angle≤ 0.5mrad≤ 0.5mrad≤ 0.5mrad
Pointing Stability≤ 0.3mrad≤ 0.3mrad≤ 0.3mrad
Dimensions (mm)72 X 50 X 35105 X 60 X 40120 X 85 X 65
Weight~ 90g~ 100g~ 190g
Accuracy≥ 98%≥ 98%≥ 98%
Error Rate≤ 3%≤ 3%≤ 3%

Table 1

The laser rangefinder has an operating temperature of negative 40 Degrees Celsius to positive 55 Degrees Celsius and a storage temperature of negative 50 Degrees Celsius to positive 70 Degrees Celsius. The primary functions include single-ranging and continuous-ranging modes with a built-in self-check function.

The main components of a laser rangefinder consist of a laser, a transmitting and receiving optical system, a laser driver, a receiving circuit, a low-voltage power supply, and an information processor. All components work in tandem as seen in Figure 3.

Laser Rangefinder 5
Figure 3. Laser Rangefinder Operational Layout


The laser rangefinder is suitable for use in conditions where visibility is not less than 26km and humidity is less than 50% in the absence of obstacles. It is designed to provide excellent reliability in measurement with a Mean Time Between Failures (MTBF), the number of transmitted laser pulses ≥ 1 million.

The system could be used in but not limited to the following application scenarios:

  • Construction Processes
  • Real Estate Development
  • Industrial Processes
  • Laser Measuring Tools
  • Security Purposes
  • Sports

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