Patent ID: 6819413
Filing Date: 2004-11-16
Classification: G01J,G01M,G02B

Abstract:
A system for sensing a wavefront of light passed through an optical device, comprising:a device under test (DUT) holder adapted to hold the optical device; a point light source adapted to provide light to the optical device; a movable platform adapted to move the point light source with respect to the optical device; a first lens adapted to receive and pass therethrough a light beam from the optical device; a range-limiting aperture adapted to receive and pass therethrough at least a portion of the light beam from the first lens; a second lens adapted to receive and pass therethrough the portion of the light beam from the range-limiting aperture; a Shack-Hartmann wavefront sensor adapted to receive the portion of the light beam from the second lens and to produce therefrom wavefront data; and a processor adapted to receive the wavefront data from the wavefront sensor and to control movement of the movable platform to move the point light source to a location about one focal length away from the optical device.