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:
Nov. 21, 1995
Filed:
Jun. 28, 1994
Applicant:
Inventor:
Kenjiro Katsuragi, Tokyo, JP;
Assignee:
Kabushiki Kaisha Topcon, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ; A61B / ;
U.S. Cl.
CPC ...
351205 ; 351208 ;
Abstract
A sensor 17 detects a quantity of light emitted by an alignment light source 21 and reflected by an eye. A comparison circuit 53 compares a quantity of the reflected alignment light with a predetermined quantity of reference light. If the reflected alignment light is less in quantity than the reference light, the comparison circuit 53 judges that there exist stains which exert a bad influence on the reflected alignment light. An operator obtains the judgment through a monitor 52 by which cautions are offered, so that the operator can operate an instrument in the best condition.