



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.
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 | 3δ |
| 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.
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.

Range performance maximum
25 km
Range performance on 2.3 x 2.3 m
15 km
Typical accuracy
±2 m
Range performance maximum
15 km
Range performance on 2.3 x 2.3 m
8 km
Typical accuracy
±1 m
Range performance maximum
12 km
Range performance on 2.3 x 2.3 m
6 km
Typical accuracy
±1 m
Range performance maximum
10 km
Range performance on 2.3 x 2.3 m
5 km
Typical accuracy
±1 m
Range performance maximum
7 km
Range performance on 2.3 x 2.3 m
4 km
Typical accuracy
±1 m
Range performance maximum
7 km
Range performance on 2.3 x 2.3 m
3 km
Typical accuracy
±1 m