DEVICE FOR PROCESSING OPTICAL INFORMATION

摘要

PROBLEM TO BE SOLVED: To decrease the deterioration of the recording and reproducing performance due to the shift of a lens and to provide a compact optical information processor having a high performance. SOLUTION: The performance of a recording and reproducing of high quality of information is realized by correcting the variation in the wave front aberration and the variation in the central intensity of a condensed spot generated by the shift of the lens by varying the inclination between a recording medium and the information processor or by varying the power intensity of a light source.