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:
Feb. 21, 1995
Filed:
Jul. 09, 1992
Takao Rokutan, Higashimurayama, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A light beam emitted from a light emitting element is trimmed by a collimation lens to produce a parallel light. The parallel light is converged on an optical card by an objective. Light returned from the optical card forms an image on a read/track detector through a beam splitter. A binary-coded signal generator generates binary-coded signals from detected signals of the read/track detector. The binary-coded signal generator comprises a plurality of I-V converters for converting the detected signals in every track of the read/track detector in current and voltage, and a plurality of binary circuits for comparing the signals converted in current and voltage with a plurality of comparison values and thus generating binary-coded signals.