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:
Mar. 07, 2000
Filed:
Dec. 08, 1998
Nobuyuki Miyake, Hiratsuki, JP;
Ken Tomioka, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
The subjective eye refractive power measuring apparatus according to the present invention objectively measures the refractive power of an optical system to be tested. The subjective eye refractive power measuring apparatus comprises a measuring element that output a detection signal corresponding to the refractive power of the optical system to be tested, an arithmetic device that calculates a measured value related to the refractive power based upon an output signal from the measuring element, a determination device that determines whether or not specific conditions related to termination of a measuring operation are satisfied based upon, at least, either a measured value obtained by the arithmetic device or the length of measurement time required for measurement and a termination device that implements specific control for terminating a measuring operation when the judgement device has determined that specific conditions are satisfied.