A specially designed machine holds the mirrors precisely in place while they are bonded to mounting tabs with ultraviolet cured epoxy. The system uses Lion Precision Elite Series capacitive sensors to monitor changes in the mirror position during the epoxy injection. The machine adjusts the epoxy pressure to precisely move the mirrors into the proper position.
Previously, laser displacement sensors were used but were eventually abandoned because of insufficient resolution, size-related mounting difficulty, and generation of too much heat causing thermal expansion of the components during the delicate operation. The capacitive sensors are less expensive, small enough to easily mount, and generate virtually no heat during operation.
The process has been documented with photos and charts in the Lion Precision website Tehcnical Library at:
In 1958, Lion Precision was the first company to provide capacitive displacement sensors to industry. The company has expanded its product offering to include eddy-current displacement sensors and some application specific sensors for the machine tool, packaging and PCB industries. The company is focused on assisting users in sensor implementation by providing expert guidance and optimized systems including custom designs.