METHOD OF MANUFACTURING AN OPTICAL ELEMENT

摘要

A method of manufacturing an optical element comprises an interferometric test of the optical element using an interferometer system of a Fizeau type combined with principles of white-light interferometry. The optical element is disposed in a cavity between a Fizeau surface and a mirror, and an optical path difference between a back surface of the optical element and the mirror is determined for determining parameters of the optical element, such as a thickness thereof . Measuring light from an optical delay apparatus is supplied to the Fizeau interferometer through an optical fiber.