3km Laser Rangefinder Module

The 3K-193 laser rangefinder is a compact eye-safe ranging module developed with a 1535 nm Er:glass laser. Designed for Class 1/1M eye-safe operation, it uses single-pulse ranging technology and achieves a maximum measuring range of ≥3 km. The module is equipped with TTL and RS-422 interfaces, and provides PC test software, a command set, and a communication protocol for easier secondary development and OEM integration.

Featuring low weight, compact dimensions, reliable performance, and stable operation, the 3K-193 is suitable for handheld systems, vehicle-mounted equipment, EO/IR pods, and other electro-optical applications.

3K-193 Technical Specifications

Laser Wavelength 1535 ± 5 nm
Maximum Measuring Range ≥3 km under the following conditions: visibility ≥10 km, relative humidity ≤80%, moderate atmospheric turbulence, target reflectivity ≥0.2, and target size of 2.3 m × 2.3 m.
Minimum Measuring Range ≤30 m
Ranging Accuracy ≤±1 m
Repetition Frequency 1 Hz–10 Hz adjustable
Ranging Success Rate ≥98%
Beam Angle ≤0.5 mrad
Dimensions 48.5 × 36 × 26 mm
Weight ≤60 g
Supply Voltage DC +5 V
Operating Temperature -40°C to +60°C
Storage Temperature -50°C to +70°C
Note: All performance parameters and interface options can be customized upon request.

The 3K-193L laser rangefinder uses laser pulse time-of-flight technology to measure the distance between the device and a target. The module emits a laser pulse toward the target, and the receiving system captures the reflected signal. By recording the precise timing of laser emission and return through high-precision digital circuitry, the system calculates the flight time of the laser pulse and derives the target distance. This enables reliable and accurate ranging performance for electro-optical and integrated sensing applications.

3K-193L Technical Specifications

No. Item Specification
1 Laser Wavelength 1535 nm ± 5 nm
2 Maximum Measuring Range Under conditions of visibility ≥15 km, moderate atmospheric turbulence, and target reflectivity of 0.2, when ranging through an optical window toward a target measuring 7.0 m × 3.3 m × 2.3 m, the maximum measuring range is ≥3 km.
3 Minimum Measuring Range ≤50 m
4 Ranging Accuracy ≤±1 m
5 Laser Beam Divergence ≤0.7 mrad
6 Ranging Success Rate ≥98%
7 Laser Repetition Frequency 1 Hz–10 Hz adjustable
8 Continuous Ranging Time Maximum continuous ranging time per operation: ≥10 min;
maximum interval before the next continuous ranging operation: ≤15 s
9 Supply Voltage +6 V to +36 V DC
10 Operating Temperature -40°C to +65°C
11 Storage Temperature -55°C to +70°C
Note: All performance parameters and interface options can be customized upon request.

Product Composition

The laser rangefinder is composed of a transmitting module, detection module, hardware circuit boards, and mechanical structure. The hardware circuit section includes a main control board and an operational amplifier board, supporting signal control, detection processing, and overall ranging operation.

Independent R&D and Flexible Customization


Developed with in-house core technology, the module supports customized configuration of key performance specifications and communication interfaces to meet different project and system integration requirements.