4km Laser Rangefinder Module

The 4K-254 laser rangefinder is a compact eye-safe ranging module developed with a 1535 nm Er:glass laser. Designed for Class 1/1M eye-safe use, it uses single-pulse ranging technology and achieves a maximum measuring range of ≥4 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, stable performance, and flexible integration, the 4K-254 can be used in handheld optical devices, vehicle-mounted systems, EO/IR pods, and other electro-optical applications.

Product Composition

The laser rangefinder is composed of a laser module, receiving antenna, detection assembly, hardware circuit boards, and mechanical structure. The hardware circuit boards include a main control board and an operational amplifier board. The main control board is configured as an external-mounted module to support flexible system integration and installation.

4K-254 Technical Specifications

Laser Wavelength 1.53 μm ± 0.01 μm
Laser Beam Divergence 0.4 mrad ± 0.1 mrad
Maximum Measuring Range ≥4 km
Minimum Measuring Range ≤30 m
Laser Repetition Frequency 1 Hz–10 Hz adjustable
Ranging Accuracy ≤±2 m
Ranging Success Rate ≥98%
Ranging Mode and Duration Maximum continuous ranging time per operation: ≥30 min
Supply Voltage DC 9–15 V
Power Consumption Standby power consumption: ≤1.5 W;
Rated power consumption: ≤3.5 W;
Peak power consumption: ≤7 W
Communication Interface RS-422 / TTL
Dimensions ≤55 mm × 34 mm × 45 mm
Weight ≤75 g
Operating Temperature -40°C to +70°C
Storage Temperature -50°C to +75°C
Laser Optical Axis Stability ≤0.3 mrad over the full temperature range
Parallelism Between Laser Optical Axis and Mounting Reference ≤0.3 mrad
Note: All performance parameters and interface options can be customized upon request.