How to Select a Laser Rangefinder Module by Parameters—A Technical Guide

Choosing the right rangefinder module for your application is critical to its success. Whether integrating into UAV, robotics, industrial automation, or security systems, understanding the key technical parameters ensures optimal performance and value.This guide will walk you through the essential specs to consider when selecting a laser rangefinder module.

1. Measuring Range (Min & Max Distance)

This is the most fundamental parameter. It defines the minimum and maximum distances the module can accurately measure.

• Consideration: Do you need to measure objects up close (e.g., 0.1 m) or at long range (e.g.,20000 m)? Always choose a module with a maximum range greater than your typical use case to account for low-reflectivity targets and adverse conditions.

2. Accuracy and Resolution

• Accuracy: This is the potential measurement error, typically expressed as ± (e.g., ±1m mor ±0.1 m). It indicates how close the measured value is to the true distance.

• Resolution: This is the smallest change in distance the module can detect. For example, a 1-meter resolution can only report changes in whole meters.

• Consideration: High-precision applications like surveying or industrial automation demand high accuracy (e.g., ±2 m). For object detection or general ranging, lower accuracy may be sufficient.

3. Laser Class and Wavelength

• Laser Class (Safety): Determines the eye safety of the module.

• Class 1: Eye-safe under all conditions. Ideal for consumer-facing and commercial products.

• Class 3R: Low risk, but direct beam exposure should be avoided. Common in industrial settings.

• Wavelength: Common wavelengths are 905nm and 1535nm.

• 905nm: More common and cost-effective. Requires careful safety measures.

• 1535nm: Invisible to the human eye and naturally eye-safe (absorbed by the eye's fluid before reaching the retina), allowing for higher power and longer range. Often used in military and premium applications.

  C onsideration: Prioritize Class 1 for safety and ease of integration. For longer range, consider the safer 1535nm wavelength.

4. Size, Weight, and Power (SWaP)

• Size & Weight (Form Factor): Critical for applications like UAVs and handheld devices where space is limited. Look for compact, lightweight designs.

• Power Consumption: Impacts battery life. Lower power consumption is essential for portable and battery-operated systems.

• Consideration: Evaluate the module's SWaP constraints against your system's available resources.

5. Update Rate (Measurement Speed)

The update rate is how many distance measurements the module can take per second (Hz). A high update rate provides near-real-time data.

• Consideration: Fast-moving applications, like autonomous vehicles or drones avoiding obstacles, require a high update rate (≥100 Hz). Slower applications like static surveying can use a lower rate (1-10 Hz).

6. Environmental Durability

• Ingress Protection (IP) Rating: The IP rating (e.g., IP54/IP67) indicates protection against dust and water. A higher rating is necessary for outdoor or harsh environments.

• Operating Temperature: Ensure the module's specified temperature range matches your application's environment, from freezing cold to industrial heat.

7. Interface and Communication Protocols

How does the module connect to and communicate with your main system?

• Common Interfaces: Serial (UART/TTL/RS422), USB, CAN bus, Ethernet, I2C, SPI.

• Consideration: Choose a module with an interface that is compatible with your host processor or microcontroller to simplify integration and software development.

8. Optical Parameters: Beam Divergence and Field of View (FOV)

• Beam Divergence: The angle at which the laser beam spreads out. A narrow divergence is excellent for pinpointing small targets at long range.

• Field of View (FOV): The angular extent over which the module can detect a target. A wider FOV is better for short-range obstacle detection.

• Consideration: For long-range targeting, choose low beam divergence. For broad detection, a wider FOV is preferable.

9.Application-Based Selection Summary

• Drones & Robotics: Prioritize lightweight, compact size, low power, and a good update rate for obstacle avoidance.

• Industrial Automation: Focus on high accuracy (mm-level), a fast update rate, and robustness (high IP rating) for a factory floor.

• Security & Surveillance: Look for long range, good performance in various weather conditions, and Class 1 eye-safety.

• Surveying & Mapping: Requires the highest possible accuracy, medium range, and environmental durability.

Conclusion: Match Parameters to Your Project
There is no one-size-fits-all rangefinder module. By systematically evaluating these parameters against your specific application needs, budget, and integration constraints, you can make an informed decision that guarantees performance and reliability.

Need Help Selecting the Right Module?
Explore our curated range of high-performance laser rangefinder modules with detailed spec sheets. Our technical experts can help you navigate these parameters to find the perfect solution for your UAV, industrial, or commercial application.

905nm Laser Rangefinder Module(Semiconductor Plused)

A1000A/1200A/1500A                         A1500B                                                                                A2000A                                                                     A2500B                                                        A2500A/3000A

TECHNICAL SPECIFICATIONS

Note:We offer professional OEM/ODM services including solution design and manufacturing for all products, and have a full-process technical support team.

1535nm DPSS Laser Rangefinder Module

            B2500A                                                             B3000A                                                          B3000B                                 B3200A                                                         B4000B

TECHNICAL SPECIFICATIONS

Note:We offer professional OEM/ODM services including solution design and manufacturing for all products, and have a full-process technical support team.

Visit our website to compare modules and contact us for a consultation today!