3km Eye-safe Laser Rangefinder Module

The STA-LRB30X is an eye-safe laser rangefinder module utilizing Stalaser’s self-developed erbium glass laser emitter. It features a maximum ranging distance of up to 3 km for NATO  targets. With a compact structure and easy integration, it operates stably and reliably in harsh environments. RS422/TTL communication interfaces are optional.

Main functions:

(1) Single ranging and continuous ranging;

(2) Responding to laser ranging commands, and can stop ranging at any time according to the stop command;

(3) Output distance data and status information once per pulse during distance measurement;

(4) It can report the cumulative number of transmitted laser pulses (no loss of power down);

(5) Distance selection, front and rear target indication;

(6) Self-test function.

Parameter Description

Product performance index:

Item Technical parameter Instruction
Model STA-LRB30X
Working wavelength 1535±5nm
Eye safety  Class 1 (IEC 60825-1)
Receiving Aperture Φ13mm
Emission aperture Φ11mm
Ranging capability 15-5000m
Ranging range ≥5500m  Large Building targets,Reflectivity: 0.6, observer visibility 20 km
≥3000m NATO target
≥2000m Human target
≥1000m UAV target
Mini Range 15m  
Multi-target detection Up to 3 target  
Ranging accuracy ±1m
Ranging frequency 1~10Hz adjustable  
Accuracy rate ≥98%  
False alarm rate 1%  
Divergence angle ≤0.6mrad  
Communication Interface TTL RS422/RS232 Interface can be customised
Voltage DC5~16V  
Power consumption ≤1.2W(@1hz) Working power
≤5W Peak power
Laser optical axis stability ≤0.05mrad  
Parallel error ≤0.3mrad Parallelism error of optical axis to mounting reference
Mechanical Shock 75g,1ms  
Working temperature -40℃~+70℃  
Storage temperature -55℃~+75℃  
Reliability MTBF ≥ 1500h  
Size ≤43×31×16mm  
Weight ≤44g  
Main Function First and last target ranging,

Multi-target ranging,

Distance selectivity

Notes:

1) NATO target size 2.3 m × 2.3 m; Human target size 0.5 m × 1.7 m; UAV target size 0.3 m × 0.3 m; Reflectivity 30%, Humidity≤50%,observer visibility≥ 12km

 Structure installation interface:

Electrical interface requirements:

Communication interface: UART (TTL_3.3 V), 115200 bps, 1 start bit, 8 data bits, 1 stop no, no parity bit;

Table 1 Core definition

Pin Definition Notes
1 Power supply + 4.5-16V
2 Power supply – GND
3 POWER_ON Power on control TTL_3.3V level, module on (>2.7V), module off (<0.3V)
4 UART_TX Serial port sender
5 UART_RX Serial port receiver
6 GND Serial port ground

OEM/ODM Laser Ranging Module | LRB30X Customized Solutions:

The LRB30X is specifically designed for system integrators, providing a user-friendly, high-performance, and compact all-in-one laser ranging solution with stable and reliable performance across a wide range of applications.

It features four core advantages: ultra-small size, ultra-light weight, ultra-low power consumption, and long-distance measurement. It is ideally suited for handheld thermal imaging devices, weapon-mounted platforms, portable systems, lightweight sensor assemblies, unmanned aerial vehicles (UAVs), and unmanned ground vehicles (UGVs), fully meeting the requirements for OEM/ODM deep customization and mass integration.

Light window usage suggestions

Material selection

Light window material

The optical glass H-K9L is selected as the light window material. H-K9L is the most common colorless optical glass, which is suitable for the laser range of 300nm ~2100nm. It has high cost performance and superior physical properties.

Processing requirements

The wedge Angle tolerance of the light window should be as small as possible. We recommend that the wedge Angle tolerance should be less than or equal to 3′ (tolerance grade less than or equal to 7);

The optical surface of the light window should be as smooth as possible, and we recommend a contour arithmetic mean deviation (Ra) of 0.012.

Use recommendations

Light window coating suggestions

The optical window of the 1535nm laser rangefinder is recommended to be coated with an anti-reflection film from 1525nm to 1545nm with a transmittance of ≥99%. Depending on the specific use environment of the product, other protective films such as hydrophobic film or hard film can be selected on the outer surface of the optical window. The other indicators refer to GJB2485-95 with a transmittance of ≥97%.

Shape and use suggestions of light window

The effective aperture of the optical window varies depending on the product. Its external dimensions should ensure that the effective aperture-outer diameter of the optical window ≥ 2 mm, and the outer diameter of the distance meter antenna-projection size of the effective aperture of the optical window ≥ 1.5 mm. The schematic diagram is shown in the figure below. Due to the absorption of laser by the optical window, it is recommended that the thickness of the optical window itself be controlled within 2 to 4mm based on its external dimensions.

Because the light window has a high transmittance, it is recommended that the axis deviation between the emission optical axis and the normal axis of the light window be controlled within 2°~4°. The schematic diagram of the position of the light window and the two barrels is shown in the figure below. At the same time, the air interval between the light window and the rangefinder should be as small as possible.

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