Optical scanning sensor element, has lens arrangement extending from the individual beam paths formed between two dividing lenses to focus the light beams reflecting from an object

摘要

A lens arrangement is extended from the individual beam paths formed between two dividing lenses to focus the light beams reflecting from an object (12), e.g. DVD, and transform the reflecting light beams into parallel light beams input into a diffraction grating (17). An Independent claim is also included for a thickness-measuring optical arrangement.