Soldered lenses

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A dosing head heats small solder balls with a laser beam and accurately shoots the melted droplets onto the lenses to fix them perfectly in place. Credit: Fraunhofer IOF
A dosing head heats small solder balls with a laser beam and accurately shoots the melted droplets onto the lenses to fix them perfectly in place. Credit: Fraunhofer IOF

Lenses in optical devices are kept in place by adhesives. This can cause problems when the microscopes and cameras are employed inside a vacuum, as the adhesives may release gases that contaminate the lenses. One alternative is to solder them instead.


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