Abstract

A differential Shack-Hartmann curvature sensor for measuring a curvature including principal curvatures and directions of a wavefront. The curvature sensor includes a Shack-Hartmann sensor with an input beam and an optical element to split said input beam into three output beams traveling in different directions. Three lenslet arrays in each of the three beam paths produce corresponding Hartmann grids. A shearing device shears two of the three Hartmann grids in two perpendicular directions a differential difference. A measuring device measures the Hartman. grid coordinates generated by said three beams to determine various curvatures of the wavefront at each of the Hartmann grid points.

Document Type

Patent

Patent Number

US 7,525,076 B1

Application Serial Number

11/998,282

Issue Date

4-28-2009

Current Assignee

UCFRF

Assignee at Issuance

UCFRF

College

College of Optics and Photonics

Department

CREOL

Allowance Date

1-28-2009

Filing Date

11-29-2007

Assignee at Filing

UCFRF

Filing Type

Nonprovisional Application Record

Donated

no

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