Long Distance Rangefinder | Rangefinder Laser ⁽¹²⁾

The 1535nm laser rangefinder mainly uses the "Time-of-Flight" measurement principle. Its working process is as follows:

• Laser emission: The rangefinder laser emits a short pulse laser beam with a wavelength of 1535nm, pointing to the target object.
• Signal reception: The laser pulse is reflected after reaching the target, and the receiver in the long distance rangefinder captures the returning laser signal.
• Time measurement: The laser rangefinder module accurately measures the round-trip time of the laser pulse from emission to reception.
• Distance calculation: The distance between the rangefinder and the target is calculated based on the speed of light and the measured time difference.

This method uses the known value of the speed of light to accurately measure the round-trip time of the laser pulse, allowing the laser rangefinder module to determine the distance to the target efficiently.

Since 1535nm wavelength lasers are considered safe for human eyes and have good atmospheric penetration, 1535nm laser rangefinders are widely used in the following fields:

• Surveying and Geographic Information Systems (GIS): used for topographic surveying and mapping, providing high-precision distance data.
• Unmanned Aerial Vehicles (UAVs) and Unmanned Ground Vehicles (UGVs): integrated into unmanned systems to achieve automatic navigation and obstacle avoidance.
• Industrial Automation: used for object detection and distance measurement in automated production lines to ensure the accuracy of the production process.

The price of 1535nm laser rangefinders varies depending on performance, measurement range, and application areas. Generally speaking, laser modules with a measurement range between 3km and 16km range from thousands of dollars to tens of thousands of dollars. 

For example, our LRF0308C eye-safe laser rangefinder module uses a self-developed 1535nm diode-pumped solid-state microchip laser, has a NATO target ranging capability of 2.3m×2.3m, a ranging range of ≥3000m, and is suitable for laser ranging, unmanned aerial systems (UAS), optical pods, and border monitoring. The price is $1,000. But the more you buy, the more discounts you get. For example, enjoy a 10% discount for more than 20 pieces.

Rangefinder Laser operates at a variety of wavelengths, each with unique advantages and considerations:

905nm wavelength: 

Commonly used in consumer devices due to cost-effectiveness and availability. However, atmospheric absorption and scattering are high, resulting in degraded performance in adverse weather conditions.

1535nm wavelength: 

Classified as eye-safe, allowing for higher power transmission without compromising safety. And with lower atmospheric absorption and scattering, longer distance rangefinder measurements are possible. The limitation is that performance may be degraded in rainy or snowy weather due to water absorption at this wavelength.

1550nm wavelength: 

Also considered eye-safe, with similar advantages to 1535nm. Potential for even longer detection ranges. However, it is more expensive and complex to design and manufacture.

The operating temperature range of long distance rangefinders like the 1535nm laser rangefinder varies by model and manufacturer. For example, the operating temperature range of the LRF0308C laser model is -40°C to 70°C, and the storage temperature is -55°C to +75°C, while the operating temperature range of the LRF0308C laser model is -40°C to +55°C.

The size and weight of these rangefinder laser depend on their intended use:

Compact Modules: Designed for integration into portable devices, some modules measure approximately 48mm x 21mm x 31mm and weigh around 33 grams. 

Larger Units: High-power, long-range models may be larger and heavier, with dimensions up to 100mm x 60mm x 70mm and weights reaching 240 grams.

Yes, our laser modules allow for simultaneous operation of the pointer (830 nm) and measuring laser (1535±5 nm). The two lasers are independent of each other and meet Class 1 eye safety standards (IEC 60825-1). This ensures the safety of users while benefiting from the capability to use both lasers at the same time for precise targeting and measurement without compromising safety.

Yes, we provide an interface kit with our LRF modules, allowing you to start testing and evaluating the module within 10 minutes of receiving it. This kit enables you to get hands-on experience with the module, understand its features, and assess its performance in your system quickly and efficiently.

The rangefinder algorithm is a closed-loop controlled circuit, meaning the long distance rangefinder dynamically adjusts its behavior based on environmental factors, target distance, and target reflectivity. A reduction in range performance after integration typically occurs due to optical crosstalk within the system.

This happens when energy from the transmitter channel directly couples to the receiver, causing the LRF to reduce emitted energy to protect the receiver. However, our laser rangefinder modules are designed with advanced anti-interference features. 

They offer enhanced shock resistance (1200g/1m, GJB150.16A-2009), vibration resistance (5-50-5 Hz, 1 octave/min, 2.5g), and electrostatic protection, making them more resilient to environmental and operational disturbances. This helps ensure stable performance and minimized range loss under challenging conditions.