Laser Rangefinders

Laser Rangefinder Module Selection Guide

A laser rangefinder module measures the distance to a target by firing a short laser pulse and timing how long its reflection takes to return. JOVSTAR builds eye-safe 905 nm and 1535 nm laser rangefinder modules from 1.2 km to 25 km, a 1064 nm laser ranging and illumination module, and handheld laser rangefinders up to 10 km. The modules are designed for integration into UAV payloads, handheld observation devices, and vehicle-mounted or fixed-site surveillance systems.

Choose a 905 nm module for lightweight, short-range integration up to about 2 km. Choose a 1535 nm module when you need 4 km or more, longer range on small targets, or multi-target detection. Choose the 1064 nm JV-LRF1005AD when ranging and laser illumination are needed in one unit, and a handheld rangefinder when you need a complete field instrument rather than a module.

Ranges are measured under each model’s stated visibility and target reflectivity, which differ between models. See each product page for the full test conditions.

How a Laser Rangefinder Module Works

A laser rangefinder module works on time of flight: it sends a laser pulse, detects the echo and converts the round-trip time into distance.

Time-of-flight ranging

Light travels about 300 metres per microsecond, so the echo from a target 1.5 km away returns in about 10 microseconds. The module’s timing circuit measures that interval and reports the distance over its serial interface, up to 10 times per second on most JOVSTAR models. Ranging accuracy depends on how precisely the echo is timed: across JOVSTAR modules it runs from ±0.3 m at short distances on the 905 nm JV-LRF902 series to ±3 m at 25 km on the JV-LRF1520AD.

Beam divergence and receiver aperture

A narrow beam keeps more laser energy on a small, distant target, and a larger receiving aperture collects more of the weak echo. This is why the long-range 1535 nm modules use beam divergence of 0.45–0.8 mrad, with 15–16 mm receiving apertures on the 4–5 km models, while the compact 905 nm modules use a 3.5–6 mrad beam (with a 7 mm aperture on the JV-LRF902 series) and weigh 6 g or less.

Multi-target detection

When the beam partly hits foliage, rain, a fence or the edge of a building before the real target, several echoes return. A multi-target module reports more than one distance so the host system can choose the right one. JV-LRF1503DD, JV-LRF1503AD and JV-LRF1505AD report up to three targets; JV-LRF1508AD and JV-LRF1520AD report two.

905 nm vs 1535 nm vs 1064 nm Laser Rangefinders

Wavelength sets the balance between range, eye safety, size and power. 905 nm suits compact, low-power devices; 1535 nm suits long range and small targets; 1064 nm is used where ranging and laser illumination are combined.

• 905 nm modules are small and efficient. JOVSTAR’s 905 nm modules weigh 5–6 g, draw ≤0.6 W on average and range up to 2 km on buildings at night or 800 m on a human-sized target. They fit handheld devices, small drones and short-range industrial measurement.
• 1535 nm modules stay Class 1 eye-safe at much higher pulse energy, because the cornea and the fluid inside the front of the eye absorb this wavelength before it can be focused onto the retina. That headroom is what lets JOVSTAR’s 1535 nm modules reach 4 km to 25 km and range human targets at 1.5 km to 13 km.
• 1064 nm is used by the JV-LRF1005AD, which combines ranging from 200 m to 5,000 m with laser illumination over ≥2 km at ≥25 mJ laser energy. It is intended for professional electro-optical systems with laser safety controls in place.

For a side-by-side summary of the four product classes, see Core Specifications above.

What Determines the Maximum Range of a Laser Rangefinder

Maximum range depends on the target as much as on the rangefinder: target size, reflectivity and atmospheric visibility all change how much laser energy comes back.

That is why every JOVSTAR range figure names its target. The JV-LRF1503AD, for example, ranges ≥5,000 m on a building with 60% reflectivity, ≥3,200 m on a 2.3 × 2.3 m target and ≥2,000 m on a 0.5 × 1.7 m human-sized target with 30% reflectivity, all at visibility of 10 km or more. The JV-LRF1508AD reaches ≥10,000 m on a building at 20 km visibility, ≥5,500 m on a human-sized target and ≥3,000 m on a 0.1 × 0.2 m target.

• Target size. A small target intercepts only part of the beam, so less energy returns than from a building or a vehicle.
• Reflectivity. Dark, wet or angled surfaces reflect less light than bright, flat ones.
• Visibility and weather. Haze, rain, fog and dust absorb and scatter the pulse on its way out and back.
• Beam divergence. A narrower beam keeps more energy on a distant target.

To size a rangefinder, use the row in the range table that matches your real target, then leave margin for haze and low-reflectivity surfaces. Check the minimum range too: it runs from 0.1 m on the JV-LRF902BD to 100 m on the JV-LRF1520AD and 200 m on the JV-LRF1005AD, so a long-range module may not suit close targets.

Integrating a Laser Rangefinder Module: Interface, Power and Size

UART-TTL suits short, board-level connections inside compact devices; RS422 suits longer cable runs and electrically noisy platforms such as vehicles and vessels.

Plan the power budget around peak power, not the average: the 905 nm modules average ≤0.6 W, but every module draws more while firing. Most 1535 nm modules operate from -40℃ to +60℃ (JV-LRF1505AD to +70℃), and the 905 nm modules from -20℃ to +60℃. For OEM projects, interfaces, mounting and ranging settings can be configured to the host system.

Laser Rangefinder Applications

JOVSTAR laser rangefinders are built into four main kinds of systems.

UAV and gimbal payloads

Weight and power drive the choice. The JV-LRF902BD (≤5 g) and JV-LRF901FD (≤6 g) suit small drones; the JV-LRF1503AD is used for aerial mapping and drone inspection, and the JV-LRF1505AD for UAV-based ranging with RS422 output.

Handheld observation and surveying

The JV-LRF901FD serves golf, power-line and outdoor target ranging, and the JV-LRF902BD engineering survey and measurement. The JV-LRF1503DD is used in handheld observation devices that need 4 km range and multi-target detection.

Vehicle-mounted and fixed-site surveillance

The JV-LRF1503DD supports vehicle-mounted and fixed-site observation; the JV-LRF902CD is used for border surveillance, forest fire monitoring and wildlife monitoring; the JV-LRF1505AD for port monitoring. See the Border and Perimeter Security System Solution and the Vehicle-Mounted All-Weather Situational Awareness Solution.

Maritime, airport and airborne systems

The JV-LRF1508AD (≥10 km) is used in maritime, airport and mining ranging; the JV-LRF1520AD (≥25 km) in airborne, shipborne and firefighting systems.

Handheld Laser Rangefinders

For field teams that need a complete instrument rather than a module, JOVSTAR offers two handheld 1535 nm laser rangefinders.

• JV-LRFM4 / JV-LRFM8: ≥5,600 m or ≥10,000 m on large targets, a 1920 × 1080 visible camera with 3.3×–80× optical zoom, BeiDou / GPS / GLONASS positioning, 0.5° azimuth accuracy and ≥7 hours of continuous operation.
• JV-LRFM10: 8× direct-view optics, ≥10 km on large targets and ≥7 km on vehicles, ±1 m accuracy, self-positioning to ≤±3 m and target positioning to ≤20 m, IP67 protection and -40℃ to +60℃ operation.

OEM and ODM Laser Ranging Projects

JOVSTAR supports project-level customization of laser ranging modules, covering ranging requirements, optical integration, interfaces, mounting and system coordination, from product configuration and prototyping to batch delivery. Laser ranging can also be combined with JOVSTAR thermal imaging, night vision and other electro-optical platforms.

Learn more about OEM & ODM customization, our factory and testing capabilities and R&D laboratories. ISO, CE and FCC certifications are shown on our About page.

Last updated: October 28, 2026 · Reviewed by JOVSTAR R&D Engineering Team