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:
May. 28, 2019
Filed:
Dec. 14, 2016
Konica Minolta, Inc., Chiyoda-ku, JP;
Yasunari Fukuta, Chiyoda-ku, JP;
KONICA MINOLTA, INC., Tokyo, JP;
Abstract
An imaging lens system includes first and second lens groups each having a positive optical power (P, P) and a third lens group. During focusing, the second lens group moves. When the first lens group is divided into two groups across, as a boundary, the longest aerial distance (t) among the axial lens-to-lens distances located on the image side of the position of half the total length of the first lens group, the object-side group being a front group and the image-side group being a rear group, the most image-side surface in the front group and the most image-side surface in the rear group are lens surfaces concave to the image side. The conditional formulae 0.2<P/P<0.6, 0.3<P/P<0.9, 0.03<t/t<0.1, and 0.05<t/t<0.14 are fulfilled (P, the optical power of the entire system; t, the aerial distance between the first and second lens groups in the infinity-object-distance condition; t, the total length of the system.