Arrangement for projecting a two-dimensional image onto an eye to be examined for use with a device that performs a subjective determination of refraction and/or a device that performs other vision functions

US6149272A · kind A · utility

Assignee

• Carl Zeiss Jena GmbH · DE

Inventors

• Roland Bergner · Jena, DE
• Klaus-Ditmar Voigt · Jena, DE

Key dates

• Filing date: Jun 20, 1997
• Grant date: Nov 21, 2000
• Expiry date: Jun 20, 2017

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B3/103
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An arrangement for use with a device that determines subjective refraction and/or performs other visual functions, comprises at least one light source, at least one light modulator for modulating the light source to produce modulated light, a driving unit for controlling said modulator to modulate the light source in accordance with video information corresponding to a video image, a two-dimensional deflector for deflecting the modulated light to produce a two-dimensional image, an optical transmitter for optically transmitting the light of the light source, and an optical projector for optically projecting the two-dimensional image onto a retina of an eye to be examined.