Laser ranging technology has wide applications in the fields of ranging and security. As a supplement to radar-based distance measurement, laser rangefinders can be used to measure the distance and speed of enemy targets, providing accurate data support for combat maneuvering and firepower strikes. At the same time, in the security sector, laser ranging technology can be employed in monitoring and alarm systems, measuring the distance between a target and the monitoring device to achieve real-time intrusion alerts, thus enhancing security.

The working principle of laser ranging involves the laser emitting a light pulse towards the target, and the receiving system captures the reflected light pulse. By measuring the time taken for the light pulse to travel to the target and back, the distance to the target can be calculated using the formula:
L=ct/2
where L is the distance, c is the speed of light in the medium, and t is the time taken for the light pulse to travel to the target and return. The schematic diagram is shown below.

The ranging accuracy is influenced by the time difference between the leading and trailing edges of the laser pulse. Therefore, the width of the laser pulse affects the ranging precision. Additionally, the ranging distance is related to the peak power of the laser, with higher peak power enabling longer measurement distances.

RealLight, with years of technological accumulation, holds a high market share in the erbium glass laser sector, offering a wide variety of products. The energy ranges from 100 µJ to 2 mJ, and products are available with or without PIN diodes and with optional emission antennas. High repetition rate products are also available to meet diverse customer needs, as shown in the table below:

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The main advantages of erbium glass lasers are as follows:

1. 1535nm Eye-Safe Wavelength: The 1535nm wavelength is within the eye-safe range, preventing harm to the user.

2. Compact Size and Light Weight: The laser is small and lightweight, making it easy to integrate into equipment and portable for individual use.

3. Wide Operating Temperature Range: The laser can operate in a wide temperature range of -40 to 65°C, significantly enhancing product reliability and stability.

4. High Peak Power: The high peak power ensures effective measurement ranges, while the narrow pulse width improves measurement accuracy.

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