DJI Zenmuse L2 Laser Scanner CP.EN.00000507.02

DJI Zenmuse L2 Laser Scanner CP.EN.00000507.02

Zenmuse L2 integrates frame LiDAR, a self-developed high-accuracy IMU system, and a 4/3 CMOS RGB mapping camera, providing DJI flight platforms with more precise, efficient, and reliable geospatial data acquisition. When used with DJI Terra, it delivers a turnkey solution for 3D data collection and high-accuracy post-processing.

• High Precision - Vertical Accuracy: 4 cm; Horizontal Accuracy: 5 cm
• Exceptional Efficiency - 2.5 km covered in a single flight
• Superior Penetration - Smaller laser spots, denser point clouds
• Detection Range - 250m @10% reflectivity, 100klx, 450m @50% reflectivity, 0klx
• 5 Returns
• Turnkey Solution
• Point Cloud LiveView
• One-Click Processing on DJI Terra

Integrated LiDAR Solution

Supported by its powerful hardware, L2 can allow for a precise scan of complex subjects within an extended range and faster point cloud acquisition. During operations, users can preview, playback, and process point cloud models on-site, with Task Quality Reports generated by DJI Terra, offering a simple, one-stop solution to improve overall efficiency. This enables users to achieve high-precision point cloud results with one-stop post-processing.

High-Level Precision

By combining GNSS and a high-accuracy self-developed IMU, this solution achieves 4cm vertical accuracy and 5cm horizontal accuracy.

Exceptional Efficiency

It’s ready for work as soon as it’s powered on and can collect both geospatial and RGB data from a 2.5km² area in a single flight.

Intuitive Operation

In conjunction with Matrice 350 RTK (or Matrice 400), DJI Terra, and DJI Modify, L2 offers a turnkey solution that is simple to use, lowering the operational threshold.

Frame-Based LiDAR

30% Detection Range Increase

L2 can detect from 250 meters at 10% reflectivity and 100 klx, and up to 450 meters at 50% reflectivity and 0 klx. ^[3] The typical operational altitude now extends up to 120 meters, notably enhancing operational safety and efficiency.

Smaller Laser Spots, Denser Point Clouds

With a reduced spot size of 4×12 cm @100m, only a fifth of that of L1, L2 not only detects smaller objects with more details, but can also penetrate denser vegetation, generating more accurate digital elevation models (DEM)

Supports 5 Returns

In densely vegetated areas, L2 can capture more ground points beneath the foliage.

Effective Point Cloud Rate: 240,000 pts/s

In both single and multiple return modes, L2 can reach a max point cloud emission rate of 240,000 points per second, allowing the acquisition of more point cloud data in a given time frame.

Two Scanning Modes

L2 supports two scanning modes, offering flexibility for users based on their task demands. In repetitive scanning mode, L2's LiDAR can achieve more uniform and accurate point clouds while meeting high-precision mapping requirements. In non-repetitive scanning mode, it offers deeper penetration for more structural information, making it suitable for power line inspection, forestry surveying, and other scenarios.

Frame-based Design

The frame-based design results in an effective point cloud data rate of up to 100%. Together with a three-axis gimbal, it brings more possibilities to surveying scenarios.

High-Accuracy IMU System

No IMU Warm-up

The performance of the IMU system has been significantly enhanced, and it is ready for use the moment it's powered on. And, the accompanying drone is ready to begin tasks immediately once the RTK is in FIX status, delivering an optimized in-the-field experience.

RGB Mapping Camera

4/3 CMOS, Mechanical Shutter

Pixel size has been enlarged to 3.3 μm, and effective pixels now reach 20 MP, resulting in a significant improvement in overall imaging, as well as more enriched true-color point cloud details. The minimum photo interval has been reduced to 0.7 seconds. The mapping camera has a shutter count of up to 200,000 times, further reducing operational costs. When point cloud collection is not needed, the RGB camera can still take photos and videos, or collect images for visible light mapping.

Application Scenarios

In coordination with DJI Enterprise flight platforms and DJI Terra, Zenmuse L2 can be applied to land surveying and mapping, electricity, forestry, and infrastructure management, as well as other scenarios.

Specifications:

Product Name: Zenmuse L2

Dimensions: 155×128×176 mm (L×W×H)

Weight: 905±5 g

Power: 28 W (typical), 58 W (max.)

IP Rating: IP54

Supported Aircraft: 

• Matrice 400
• Matrice 350 RTK
• Matrice 300 RTK (requires DJI RC Plus)

Storage Temperature: -20° to 60° C (-4° to 140° F)

General Operating Temperature: -20° to 50° C (-4° to 122° F)

System Performance

Detection Range: 450m @50% reflectivity, 0 klx, 250m @10% reflectivity, 100 klx

*Typical data. Measured using a flat subject with a size larger than the laser beam diameter, perpendicular angle of incidence, and an atmospheric visibility of 23 km. In low-light environments, the laser beams can achieve the optimal detection range. If a laser beam hits more than one subject, the total laser transmitter power is split, and the achievable range is reduced. The maximum detection range is 500 m.

Point Cloud Rate: Single return: max. 240,000 pts/s, Multiple returns: max. 1,200,000 pts/s

System Accuracy: Horizontal: 5 cm @ 150 m, Vertical: 4 cm @ 150 m

*Measured under the following conditions in a DJI laboratory environment: Zenmuse L2 mounted on a Matrice 350 RTK and powered up. Using DJI Pilot 2’s Area Route to plan the flight route (with Calibrate IMU enabled). Using repetitive scanning with the RTK in the FIX status. The relative altitude was set to 150 m, flight speed to 15 m/s, gimbal pitch to -90°, and each straight segment of the flight route was less than 1500 m. The field contained objects with obvious angular features, and used exposed hard ground check points that conformed to the diffuse reflection model. DJI Terra was used for post-processing with Optimize Point Cloud Accuracy enabled. Under the same conditions with Optimize Point Cloud Accuracy not enabled, the vertical accuracy is 4 cm and the horizontal accuracy is 8 cm.

Real-Time Point Cloud Coloring Coding: Reflectivity, Height, Distance, RGB

LiDAR

Ranging Accuracy (RMS 1σ): 2 cm @ 150 m *Measured in an environment of 25° C (77° F) with a subject of 80% reflectivity at a distance of 150 m. The actual environment may differ from the testing environment. The figure listed is for reference only.

Maximum Returns Supported: 5

Scanning Modes: Non-repetitive scanning pattern, Repetitive scanning pattern

FOV: Repetitive scanning pattern: Horizontal 70°, Vertical 3°, Non-repetitive scanning pattern: Horizontal 70°, Vertical 75°

Minimum Detection Range: 3 m

Laser Beam Divergence: Horizontal 0.2 mrad, Vertical 0.6 mrad *Measured at full width at half maximum (FWHM) conditions. 0.6 mrad signifies that for every 100m increase in distance, the diameter of the laser beam expands by 6 cm.

Laser Wavelength: 905 nm

Laser Spot Size: Horizontal 4 cm, vertical 12 cm @ 100 m (FWHM)

Laser Pulse Emission Frequency: 240 kHz

Laser Safety: Class 1 (IEC 60825-1:2014)

Accessible Emission Limit (AEL): 233.59 nJ

Reference Aperture: Effective Aperture: 23.85 mm (equivalent to circular)

Max Laser Pulse Emission Power Within 5 Nanoseconds: 46.718 W

IMU System

IMU Update Frequency: 200 Hz

Accelerometer Range: ±6 g

Angular Velocity Meter Range: ±300 dps

Horizontal Positioning Accuracy: RTK FIX: 1 cm + 1 ppm

Vertical Positioning Accuracy: RTK FIX: 1.5 cm + 1 ppm

RGB Mapping Camera

Sensor: 4/3 CMOS, Effective Pixels: 20 MP

Lens: 

• FOV: 84°
• Format Equivalent: 24 mm
• Aperture: f/2.8-f/11
• Focus Points: 1 m to ∞ (with autofocus)

Shutter Speed: Mechanical Shutter: 2-1/2000 s, Electronic Shutter: 2-1/8000 s

Shutter Count: 200000

Photo Size: 5280×3956 (4:3)

Still Photography Modes: 

• Single shot: 20 MP
• Timed: 20 MP
• JPEG Timed Interval: 0.7/1/2/3/5/7/10/15/20/30/60 s
• RAW/JPEG + RAW Timed Interval: 2/3/5/7/10/15/20/30/60 s

Video Codec and Resolution

• H.264, H.265
• 4K: 3840×2160 @30fps
• FHD: 1920×1080 @30fps

ISO: Video: 100-6400, Photo: 100-6400

Video Bitrate: 4K: 85Mbps, FHD: 30 Mbps

Supported File System: exFAT

Photo Format: JPEG/DNG (RAW)

Video Format: MP4 (MPEG-4 AVC/H.264 or HEVC/H.265)

Gimbal

Stabilization System: 3-axis (tilt, roll, pan)

Angular Vibration Range: 0.01°

Mounting: Detachable DJI SKYPORT

Mechanical Range: Tilt: -143° to +43°, Pan: ±105° ^{* Structural limit, not controllable range.}

Controllable Range: Tilt: -120° to +30°, Pan: ±90°

Operation Mode: Follow/Free/Re-center

Data Storage

Raw Data Storage: Photo/IMU/Point cloud/GNSS/Calibration files

Point Cloud Data Storage: Real-time modeling data storage

Supported microSD Cards: microSD: Sequential writing speed 50 MB/s or above and UHS-I Speed Grade 3 rating or above; Max capacity: 256 GB. Use the recommended microSD cards.

Recommended microSD Cards: 

• Lexar 1066x 64GB U3 A2 V30 microSDXC

• Lexar 1066x 128GB U3 A2 V30 microSDXC

• Kingston Canvas Go! Plus 128GB U3 A2 V30 microSDXC

• Lexar 1066x 256GB U3 A2 V30 microSDXC

Post-Processing

Supported Software: DJI Terra

Data Format: DJI Terra supports exporting point cloud models in the following formats: PNTS/LAS/PLY/PCD/S3MB