In imaging optics, centering errors in the alignment of the optical surfaces of a lens lead to aberrations. In spite of a very precise process, a lateral offset between both optical inserts in the mould occurs and results in centering errors of the replicated optical component. A new mould concept avoids centering errors while producing optical plastics components by adjusting the optical insert of the fixed mould half. The insert can be aligned by thermal expansion bolts from cycle to cycle with an accuracy in the lower micron-range. Therefore it is possible to improve the optical performance of moulded optical components without a machining of the mould.
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