Patent ID: 8789943
Filing Date: 2014-07-29
Classification: B29D,G02B,G02C

Abstract:
1. A system for determining an effective Abbe value of an optical element, the system comprising: a tunable laser capable of providing a collimated beam of light at one or more wavelengths; a spatial filter aperture to expand the collimated beam of light; a beam forming aperture to provide a spot beam of consistent diameter with a Gaussian intensity profile, wherein the said spot beam of one or more wavelengths impinges on a predetermined location of a test optical element, wherein the beam forming aperture receives the collimated beam from the spatial filter aperture; a detector that detects a centroid of the spot beam refracted through the test optical element of one or more wavelengths while the optical element is in a beam path; and a computation station that computes a location of the centroid of the spot beam on the detector with and without the test optical element in the beam path and determines the effective Abbe value of the test optical element based on the deflection of the centroid of the spot beam of one or more wavelengths.