Patent · US Active

Apparatus and method for determining centering data for spectacles

US7384144B2 · kind B2 · utility

9Cited by

5References

24Claims

0Family size

Assignee

Carl Zeiss Vision GmbH · DE

Inventors

Martin Ross-Messemer · Oberkochen, DE
Matthias Kubitza · Aalen, DE
Frank Holler · Stein-Wingert, DE
Herbert Krug · Ludwigshafen, DE
Holger Wegendt · Mögglingen, DE

Key dates

Filing date	Jul 12, 2006
Grant date	Jun 10, 2008
Priority date	—
Expiry date	Aug 29, 2026

Classification

Technology area (CPC G)Physics
CPC primaryG02C13/005
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An apparatus (3) for determining centering data for eyeglasses (2) comprises a fixation device (5) and a recording unit (4) that can be triggered by a computer, records electronic images, and is disposed behind a divider element (8). The fixation device (5) produces at least one speckle pattern. The speckles can be superposed by different patterns, for example, a cross shape. The invention further relates to a method for determining centering data. The inventive method and apparatus allow to measure for test persons having the most different acuity of vision the relative centering data from a short distance while maintaining their usual posture.

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