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:
Jun. 12, 1984
Filed:
Jun. 22, 1982
Applicant:
Inventors:
Susumu Takahashi, Tokyo, JP;
Yasuo Kato, Tokyo, JP;
Yoshinori Oana, Tokyo, JP;
Yoshiyuki Hatano, Tokyo, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
351208 ;
Abstract
In an ophthalmoscopic instrument such as an eye fundus camera or an eye refractometer, a device is provided for detecting the position of a patient's eye. The device includes a target projecting system for projecting a light beam to the patient's eye, an imaging lens for imaging the light beam as reflected at the patient's eye and a detector for sensing the reflected light beam. A chopper is provided for selectively passing the reflected light beam to the detector for making it possible to produce a signal which includes informations of imaging condition of the light beam at the detector.