Laser Sensors solutions based on MEMS Mirror
LiDAR and other 3D sensors, based on laser scanning patterns, are one of the growing markets for MEMS scanning solutions. Maradin’s MEMS scanners are Ideally fit for MEMS-based LiDAR and sensors with the capability of managing high power lasers at various wavelengths at a moderated system cost. Maradin’s full scanning solution, including both a MEMS scanning mirror and a mirror controller, is designed to withstand shocks and vibrations typical for automotive and industrial applications (e.g., MEMS LiDAR for vehicles, MEMS LiDAR for drones, etc.). Maradin’s flexible platform enables easy integration and a baseline for customization fits any optical requirements of such Sensors.
Applications for Laser Sensors Solutions
Sensors Solutions Applications for Consumer and Automotive industry
Laser-based sensors are not “one size fits all”. Very few could offer a solution across the whole application range and Maradin holds the best offering, utilizing its large technology and IP baseline.
How it works?
Take a laser (at a specific desired wavelength), and diverge the laser light beam to different places on a target area by using a tiny MEMS scanning mirror. The deflection is done in a specific scanning mode that covers the entire target area, pixel after pixel. The scanning is done synchronized to a sensor that sees only the desired image (either laser dots in case of TOF or a full image in the case of structured light). The scanning mirror has actuators and sensors built into the MEMS mirror device. It is driven and controlled by a MEMS drive and control electronics (aka “mirror controller”). The system firmware is software that contains several blocks, among them a communication block based on SPI Comm. Protocol to command the mirror controller and a timing control block (TCB). The TCB is based on proprietary algorithms that according to the movement of the MEMS mirror (by sync signals coming from the controller) generates timestamps, enabling the laser driver to turn on the laser (“pixel out”) and also to synchronize the light sensors (e.g., SPAD, Photo Diode, etc.). Maradin provides all 3 major components for such system (MEMS scanning mirror, Mirror Controller and System firmware)
The MEMS Mirror
The MAR1110.E is a dual-axis MEMS-based scanning mirror targeted for miniature laser steering applications, such as laser projectors and MEMS-based LiDAR and sensors. It is based on industry-leading MEMS technology with novel and precise actuation schemes. The innovative MEMS mirror device combines a fast electro-static actuator and a powerful electromagnetic actuator, which yields peak performance under varying conditions.
The Controller
The MAR2200 is an Analog Driver and control IC for Maradin’s MAR1110.E dual-axis MEMS-based scanning mirror. MAR2200 targets miniature laser steering applications, such as laser projectors and MEMS-based LiDAR and sensors. MAR2100 drives and controls Maradin’s MAR1110.E dual-axis scanning mirror and generates the timing signals to synchronize the laser module through the Host, also called a Data Manipulator. As MAR1110.E MEMS mirror scanner has two uncoupled actuators – one for horizontal scan and one for vertical scan, MAR2200 controller IC supports both drivers.
The System firmwere
Maradin’s System Firmware is an FPGA code that enables seamless integration of the MEMS mirror scanners and mirror controllers to the application hardware. The system firmware comprises novel algorithms, synchronizing the MEMS mirror angular position and lasers’ modulation signals. The system firmware enables the display pixels’ timing and long-term stability. It also enables real-time parameter programming, to mirror control the MEMS mirror scanners and Controllers. The system firmware is suitable both for Sensors (such as MEMS LiDARs) and Display applications (e.g., Laser projects)
