I. NLM-3500A 1535nm Eye-Safe Telemetry Engine for UAV Tracking Systems

A mission-critical, high-precision sensor core designed for reliable long-range detection and rapid spatial acquisition.

As a premier mission-critical laser ranging engine, the NLM-3500A establishes a verified standard for active distance acquisition in the 1535nm DPSS spectrum. Engineered to secure a verified 3.5km measuring capability, this high-resilience engine provides the necessary stand-off distance for advanced low-altitude security and perimeter observation. By constraining its mass to an ultra-lightweight ≤70g, it empowers aerospace integrators to deploy high-fidelity ranging sensors on micro-UAVs and automated tracking platforms. This sensor operates stably from -40℃ to +60℃, delivering absolute operational confidence through its ±1m accuracy and integrated SDK for rapid machine vision cross-linking.

UAV Tracking Engine

1535nm Strategic Payload

3.5km Ranging Sensor

Mission-Critical Laser Core

Class 1 Eye-Safe

II. Strategic Technical Innovations

Precision Target Discrimination: Specifically calibrated to identify mid-sized drones like the DJI Phantom 4 at ≥1500m and smaller Mavic 3 Pro units at ≥1000m.
High-Fidelity Signal Processing: Achieves a ≤1% false alarm rate with a measurement success rate of ≥98%, ensuring trusted telemetry data for automated systems.
Versatile Repetition Dynamics: Supports a wide pulse repetition frequency range from single-shot up to 10Hz for high-speed dynamic engagement.
Optimized Energy Profile: Features a standby power consumption of ≤1mW and an average active draw of ≤1W, maximizing deployment duration for battery-powered platforms.
High-Resilience Ruggedization: Protected to IP67 standards and validated for stable performance in extreme humidity and varying visibility conditions.

III. Application Focus: Engine Deployment Scenarios

Low-Altitude UAV Detection & Aerial Security Systems

The NLM-3500A serves as the primary detection core for low-altitude security, providing a 1000m buffer against DJI Mavic 3 Pro targets. Its precise multi-target logic allows observation trackers to differentiate between environmental clutter and airborne assets.

Mission-Critical Security Laser Rangefinder Systems

For border and perimeter monitoring, this engine provides 3.5km vehicle detection and 2km human-shaped target acquisition. The integrated first/last target ranging logic ensures that security operators can monitor intrusions through foliage or obscured atmospheric conditions.

Unmanned Aerial Vehicle Detection Laser Sensors & Tracking

Beyond security, the module serves as a high-precision surveying payload for aerial inspection and site protection. Its compact form factor enables the integration of multiple sensors into a single gimbal, providing comprehensive machine vision for industrial safety and asset protection.

IV. NLM-3500A Technical Specification Matrix

Technical Parameter	Detailed Specifications
Product Model	NLM-3500A
Laser Wavelength	1535nm ± 5nm (Class 1 Eye-Safe IEC 60825-1)
Measuring Range (Vehicle Target)	≥ 3500m (Visibility ≥10km, RH ≤60%)
Measuring Range (Human Target)	≥ 2000m (Visibility ≥10km, RH ≤60%)
Measuring Range (DJI Phantom 4)	≥ 1500m (Visibility ≥10km, RH ≤60%)
Measuring Range (DJI Mavic 3 Pro)	≥ 1000m (Visibility ≥10km, RH ≤60%)
Minimum Measuring Range (Blind Zone)	≤ 20m
Distance Resolution	0.1m
Distance Accuracy	≤ ±1m
Measurement Success Rate	≥ 98%
False Alarm Rate (FAR)	≤ 1%
Multiple Target Capabilities	First / Last Target Logic Supported
Aperture (Tx / Rx)	Φ12mm / Φ28.5mm
Pulse Repetition Frequency	Single-shot, 1Hz, 2Hz, 3Hz, 4Hz, 5Hz, 10Hz
Beam Divergence	≤ 1mrad (Typical)
Power Consumption (Peak / Avg / Standby)	≤ 5W (@5V@1Hz) / ≤ 1W / ≤ 1mW
Supply Voltage (DC)	DC 4.5V ～ 14V
Communication Interface	TTL (Baud: 115200 / 57600 / 38400 / 9600 bps)
Operating / Storage Temperature	-40 ℃ ~ +60 ℃ / -45 ℃ ~ +70 ℃
Dimensions / Weight	≤ 60mm × 32mm × 48mm / ≤ 70g

V. Universal Integration & Electrical Interface

Standby Efficiency: Minimal power draw of ≤ 1mW for extreme low-power consumption modes.
Active Diagnostics: Integrated power-up and temperature acquisition with real-time self-diagnostic capabilities.

Interface Connector: A1257WR-S-6P (Socket) | Plug: A1257H-6P

Pin No.	Definition	Electrical Logic	Remarks
P-1	VIN+	Input Power Positive (4.5～14V)	Primary Power
P-2	VIN-	Input Power Negative	System Ground
P-3	POWER_ON	ON (>2.7V) / OFF (<0.3V)	TTL 3.3V Level
P-4	UART_TX	Serial Transmit Terminal	TTL 3.3V Level (Module → Host)
P-5	UART_RX	Serial Receive Terminal	TTL 3.3V Level (Host → Module)
P-6	GND	UART Communication Ground	–

VI. Mechanical and Optical Interface Specifications

The NLM-3500A structural blueprint is designed for rigid fixation on aerospace platforms, utilizing a secure 4 × M3 threaded mounting pattern.

NLM-3500A mission-critical laser ranging engine Dimensions and Optical Interface

Effective Aperture: Tx Ø12mm, Rx Ø28.5mm | Mounting: 4 × M3 threaded holes (depth 5mm) and 3 × M3 holes (depth 3.5mm).

Optical Window Orientation: Integrated Φ12mm laser emission window and Φ28.5mm large-aperture reception window for optimized signal-to-noise ratio.
Mounting Precision: Features dedicated 26±0.1mm and 29.5±0.1mm anchoring centers for precise system tri-point fixation.
Environmental Integrity: Built with high-resilience structural housing. Ensure the lens assembly is sealed against dust and moisture during final payload integration.

VII. Mission-Critical Laser Ranging Engine Universal Adaptability

Beyond its primary role as a mission-critical laser ranging engine, the NLM-3500A serves as a versatile spatial data source for intelligent traffic systems, vehicle monitoring, and remote industrial site safety. Its combination of severe environmental stability, high-frequency telemetry, and ultra-compact SWaP-optimized design establishes it as a universally adaptable sensor for critical automation ecosystems.
Note: This high-performance module is optimized for civil security and industrial surveying; avoid electrostatic discharge (ESD) during handling and maintain operation strictly within storage temperature limits.