Patent · US Expired

Wavefront sensor having multi-power beam modes, independent adjustment camera, and accommodation range measurement

US7625089B2 · kind B2 · utility

1Cited by

18References

12Claims

0Family size

Assignee

BAUSCH & LOMB INCORPORATED · US

Inventors

Gerhard Youssefi · Landshut, DE
Hans-Joachim Polland · Wolfratshausen, DE
Christoph Sappel · Winnweiler, DE

Key dates

Filing date	Mar 6, 2006
Grant date	Dec 1, 2009
Priority date	—
Expiry date	Mar 6, 2026

Classification

Technology area (CPC G)Physics
CPC primaryG01J9/00
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An improved wavefront sensor is provided that enhances the initial focus and precision of imaged spots used to determine the monochromatic wave aberrations of the eye. The wavefront sensor includes an adjustment camera that is independent of a lenslet camera. A laser in a lower power mode is projected onto the retina of the eye and is brought into more precise or sharp focus by a control system employing data from the adjustment camera, which aids in focusing the imaged spots. “Trombone”-type optics are used to adjust the focus of the light projected onto the retina and the imaged spots onto a sensor. The laser has a higher power mode used when acquiring data of the imaged spots from the sensor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.