Technology

Blickfeld solid-state LiDAR is characterized by innovative system architecture and on-device processing.

MEMS Beam Deflection Unit

The core of Blickfeld’s 3D solid-state LiDAR is a proprietary silicon MEMS (micro electro mechanical systems) mirror specifically developed for LiDAR applications to provide high resolution, a long detection range, and a wide field of view.

Centimeter-sized Mirrors

In order to reach the range required for automotive applications, an especially large aperture is needed. Blickfeld has developed patented technology that makes it possible to manufacture MEMS mirrors with a diameter of more than one centimeter.

Dynamic Control

Thanks to the Blickfeld mirror control, the vertical resolution and frame rate of the LiDAR sensors can be flexibly adjusted even during operation. This allows, for example, the dynamic definition of focus zones in which more detailed data is captured.

Sensor Series Production

Blickfeld manufactures the mirrors with photolithographic production techniques that allow the highest levels of precision even with large quantities. In a highly automated process, a standard silicon wafer is turned into hundreds of MEMS components simultaneously – a method that has been applied and optimized in the semiconductor industry for decades.

Laser Detector Module

Blickfeld has invented a patented Laser Detector Module (LDM) for its LiDAR sensor. The opto-electronic setup is designed to resemble the design of automotive cameras. They can therefore be manufactured on volume production lines with the highest levels of precision, similar to those used for camera production.

905 nm Laser Source

Blickfeld LiDAR sensors use a 905 nm laser source. These laser diodes are very cost-effective and eye-safe, but can only be used with limited power: The Blickfeld setup meets this challenge with an uncommonly large aperture in order to achieve remarkably long-range detection and a wide field of view.

Straylight Suppression through Coaxial Design

The proprietary Blickfeld setup is coaxial, meaning that the optical path of the light is almost identical on the way to the object and back to the detector. As a result, only the photons from the exact direction in which the laser was sent are collected and as little background light as possible is considered. This provides spatial filtering to achieve the best signal-to-noise ratio, contributing to a long detection range.

SiPMs – Solid State Silicon Detectors

The silicon photomultipliers used by Blickfeld are arrays of SPADs connected in parallel that provide high-precision measurements at low operating voltages. The resulting dynamic bandwidth ensures that Blickfeld LiDARs reliably detect both weakly reflective distant objects and highly reflective objects at close range.

Digital Signal Processing

Through careful signal processing, which contains filtering, correlation, and statistical analysis, the Blickfeld software determines exact positions in the three-dimensional space. The Blickfeld algorithms run on state-of-the-art integrated computing hardware.

Perception Software

LiDAR sensors produce point clouds that map the sensor environment in 3D. Typically, individual point clouds can contain tens of thousands of distance points (individual distance measurements). They contain a large amount of valuable environmental information. Blickfeld’s powerful software stack extracts more abstract information from the wealth of data and makes it easily accessible, enabling environmental perception.

Smart LiDAR

Blickfeld sensors do not only collect detailed 3D data, but are also capable of computing and providing enriched information through on-device pre-processing. This pre-processing is accomplished by a high-performance computing chipset integrated into the LiDAR. The algorithm library includes various pre-processing algorithms, e.g. an algorithm that enables dynamic motion detection. where the static background within the point cloud is identified and removed so that the device transmits only motion information: Dynamic objects, such as people and vehicles, are detected and highlighted along with their movements

Data Processing Algorithms

The Blickfeld perception stack is designed to be used for various applications in the automotive, industrial, agricultural, smart city, and security sectors. Blickfeld algorithms enable, among other things, object recognition, classification and counting, motion tracking, localization, volume measurement, background subtraction, and recognition of drivable areas.

Fusion of Several LiDAR Sensors

In order to capture larger areas, the data from multiple Blickfeld LiDAR sensors can be easily merged. The tracking of objects also works smoothly in the transition area between point clouds of different devices, thanks to high-performance algorithms.

LiDAR Technology

Time of flight principle

LiDAR Technology
A LiDAR emits light pulses
LiDAR Technology
and detects the light reflected by objects.
LiDAR Technology
The sensor measures the time between emission and return of the laser pulse and thereby calculates exact distances.
LiDAR Technology
A LiDAR repeats this procedure up to a million times per second and summarizes the results in a high-definition 3D point cloud.

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