Abstract
Conventional production methods for high precision lens alignment typically rely on lens rotation. In the case of rotationally non-symmetric optics and mounts, this is problematic. Here, we report a new concept for alignment bonding without lens rotation, based on a high precision linear bearing as position reference and a hexapod actuator for lens manipulation. For the optical axis of two test lenses after bonding, <1 arcmin element tilt and <10 μm decentre was achieved. This is confirmed by an independent measurement. Our alignment device and process can be applied for any lens and mount geometry. This will be especially useful for high-end products with small size and for rotationally non-symmetric systems.
Highlights
Conventional lens alignmentThe assembly of high performance imaging lens systems requires extreme accuracy
Conventional production methods for high precision lens alignment typically rely on lens rotation
We report a new concept for alignment bonding without lens rotation, based on a high precision linear bearing as position reference and a hexapod actuator for lens manipulation
Summary
The assembly of high performance imaging lens systems requires extreme accuracy. Lens tilt below 2‘ and decentre below 10μm cannot be achieved by mechanical positioning, due to machining tolerances. For this reason, alignment turning processes are widely used for industrial production of high performance lenses [1]. Alignment turning processes are widely used for industrial production of high performance lenses [1] This involves the mounting of each lens in a subcell and the subsequent adaptation of the mechanical interfaces to the optical axis of the lens by use of a turning machine with integrated optical measurement instruments. Each subcell is integrated in the optical system
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