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:
Sep. 02, 2003
Filed:
May. 02, 2000
Applicant:
Inventor:
Yoshie Shimizu, Ibaraki, JP;
Assignee:
Minolta Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 1/124 ;
U.S. Cl.
CPC ...
G01N 1/124 ;
Abstract
A bilaterally conjugate telecentric optical system has, sequentially from one conjugate side, a first lens unit in the form of an afocal optical system including sequentially from one conjugate side a first subunit having positive optical power and a second subunit having positive optical power, and having an aperture stop fixed in the optical axis direction at the focal position on the back side of the first subunit; and a second lens unit in the form of an afocal optical system that is movable in the optical axis direction to adjust the focus while maintaining a telecentric state.