FOCUSING SYSTEM AND METHOD TO BE USED FOR IMAGE FORMATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a means of accurately achieving automatic and effective focusing.

SOLUTION: The first assembling body is for guiding the second lighting field toward an image formation along the second lighting route being different from the first lighting route and not parallel to the first lighting route. The first assembling body is equipped with abeam splitter and a sensor assembling body of a beam splitter having a beam splitter and at least one lens. The second partial assembler is for receiving a part of the second lighting field from the image formation field and is equipped with a lens and a sensor for preparing sensor outputting signals. A control assembler is for adjusting a focus of an optical image formation system depending on the sensor outputting signals.

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