Wavefront phase sensors using optically or electrically controlled phase spatial light modulators

US6911637B1 · kind B1 · utility

Assignee

• The United States of America as represented by the Secretary of the Army · US

Inventors

• Mikhail A. Vorontsov · Laurel, US
• Eric W. Justh · Greenbelt, US
• Leonid I. Beresnev · Columbia, US
• Perinkulam Krishnaprasad · Glenn Dale, US
• Jennifer C. Ricklin · Laurel, US

Key dates

• Filing date: May 23, 2002
• Grant date: Jun 28, 2005
• Expiry date: May 23, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01J9/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Systems for optical wavefront sensing and control based on a phase contrast Fourier domain filtering technique. Optically or electronically controlled phase spatial light modulators (SLM) are used as the Fourier domain filter. A direct adaptive-optic feedback system using the optical wavefront sensing systems. A differential Zernike filter is also disclosed.