The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 1992
Filed:
Jul. 03, 1991
Applicant:
Inventors:
Assignee:
Nidek Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ;
U.S. Cl.
CPC ...
356124 ; 356127 ;
Abstract
An automatic lensmeter according to the present invention is used for accurately measuring optical characteristics of a lens to be examined. The automatic lensmeter incorporates a mode change-over switch for switching to an addition diopter measurement mode, memory means for storing cylindrical diopter of a measured far-vision area of the lens, calculation means for calculating a difference between the cylindrical diopter measured in the addition diopter measurement mode and the cylindrical diopter of the far vision portion, and display means for indicating a calculated result of the calculation means thereon.