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:
Apr. 08, 1997
Filed:
Apr. 28, 1995
Applicant:
Inventors:
Assignee:
Olympus Optical Co. Ltd., Tokyo-to, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ; G02B / ;
U.S. Cl.
CPC ...
359661 ; 359717 ; 359740 ; 359793 ;
Abstract
An objective optical system for endoscopes consisting, in order from the object side, of a front lens unit having a negative refractive power, and a rear lens unit which is composed of a single lens component and has a positive refractive power. This objective optical system comprises a small number of lens components, has favorably corrected aberrations and satisfies the following condition: