Device for automatic measuring of focal values of multi-focal lenses, has auto frontal focus meter with laser illumination driven by four mini-actuators

摘要

A auto frontal focus meter with laser illumination is driven by up to four mini-actuators to perform the automatic measurements. The mini-actuators are controlled by a microprocessor or a control processing unit. The measurement results are displayed in image or graphic form on a television screen or a mini-printer.