This describes a new automated assembly technique, developed by Leica Geosystems and the Swiss Federal Institute of Technology, which allows the automated precision assembly of miniature optical components and subsystems.
Dubbed TRIMO‐SMD (three‐dimensional miniaturised optical surface‐mounted device), this new technique is designed for use with optical components of around 2 mm in diameter such as laser diodes. It uses six‐axis robotic motion, automated optical alignment with cameras and position sensors and laser‐reflow soldering to assemble photonic modules.
This development has been commercialised and is being used in a production environment by Leica Geosystems. It fixes the optical element into position in just 2 s and the placement accuracy of each component is repeatable to within 1 μm.
This technique has allowed novel micro‐optical assemblies to be produced automatically and has improved the performance and reduced the size and weight of certain precision optical products such as laser rangefinders and Lidar transceiver modules.
This is a new technique which, by allowing the automated, precision assembly of miniature optical components, will benefit companies involved with the manufacture of optical sensing, telecommunications, medical and other products.
