Optical material and method for modifying the refractive index

US10543076B2 · kind B2 · utility

Assignee

• University of Rochester · US

Inventors

• Wayne H. Knox · Rochester, US
• Li Ding · Hefei, CN
• Jay F. Kunzler · Canandaigua, US
• Dharmendra Jani · Keller, US

Key dates

• Filing date: Mar 1, 2013
• Grant date: Jan 28, 2020
• Expiry date: Jun 30, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C2202/14
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A laser system for modifying the index of refraction of an optical hydrogel material. The laser system comprises a computer program to determine the position and shape of refractive structures to be written into the optical hydrogel material to correct a patient's vision, and a focused laser that generates laser light having a wavelength of from 400 nm to 900 nm, and which operates with an average power of 10 mW to 1000 mW to produce a pulse energy from 0.05 nJ to 1000 nJ with a peak intensity at focus of greater than 1013 W/cm2. The refractive structures exhibit a change in the index of refraction of 0.01 to 0.06 in the optical hydrogel material.