Products | December 11, 2020
Increasing the Output of Spatial Recognition and Ranging Systems by 30%
ROHM’s newly developed VCSEL technology achieves greater accuracy in spatial recognition and distance measuring systems by using Time Of Flight (TOF) systems.
This is a product release announcement by ROHM Semiconductor. The issuer is solely responsible for its content.
The VCSEL (short for vertical-cavity surface-emitting laser) module technology has become popular in recent years with the adoption of laser light sources for spatial recognition in tablets and facial recognition in smartphones. And with the emergence of Automated Guided Vehicles (AGVs) and industrial inspection systems utilizing gesture and shape recognition, the demand for VCSEL is expected to increase. At the same time, for applications that require automation, shorter pulse drive and higher output for the light source are required to achieve higher accuracy sensing. Conventionally, in VCSEL-equipped laser light sources, both the VCSEL device and MOSFET for driving the light source are individually mounted on the board. Consequently, the wiring length (parasitic inductance) between products has an unintentional effect on the light source output and drive time – making it difficult to achieve a light source that provides the high output and short pulses needed for high accuracy sensing. The new VCSEL module technology developed by ROHM makes it possible to modularize the VCSEL and MOSFET elements into a single package. By minimizing the wiring length between elements, the performance of each element is maximized, resulting in a light source capable of short pulse drive (under 10ns) that reduces susceptibility to external noise from sunlight while enabling up to 30% higher output over conventional solutions. As a result, when evaluating ROHM’s VCSEL module technology in spatial recognition and ranging systems comprised of a control IC, TOF sensor (light receiving element), and laser light source (VCSEL module), the amount of light reflected to the TOF sensor is increased by 30% over conventional configurations, contributing to improved accuracy in TOF systems. ROHM plans on releasing its new VCSEL module in March 2021 for AGVs in the industrial market and facial recognition systems for mobile devices requiring high accuracy sensing. The company will also continue to develop high output lasers for LiDAR in vehicles and other applications. ROHM Initiatives for the Laser Light Source Market ROHM develops and supplies LEDs, Fabry-Perot laser diodes, and VCSELs that are being adopted in laser printers, robot vacuum cleaners, and more. At the same time, we have engaged in research and development of VCSEL module technology to achieve higher output and maximize the performance of VCSEL elements by leveraging expertise garnered from commercializing optical device-equipped products. ROHM is developing feature-rich laser light sources by applying the above-mentioned technology to the laser light sources and elements created during R&D, contributing to higher accuracy spatial recognition and ranging systems.
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