METHOD AND APPARATUS FOR QUANTITATIVELY MEASURING OPTICAL QUALITY OF TRANSPARENT MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method and an apparatus for quantitatively measuring (determining) the optical quality of a transparent material. SOLUTION: A scatter volume is formed in a sample by emitting a light beam into the sample consisting of the transparent material. The light is scattered in the scatter volume at a predetermined scatter angle (Θs), and imaged on a light-sensitive element. A signal from the light-sensitive element is integrated or accumulated over a part of the scatter volume. A measurement value is measured and indicates the optical quality of the sample consisting of the transparent material. A measurement variable is measured by using only an engagement of a signal not generated from a scatter of the incident light beam on a light entrance face or a light exit face of the sample. COPYRIGHT: (C)2006,JPO&NCIPI