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. 28, 2020
Filed:
Apr. 04, 2017
Sharp Kabushiki Kaisha, Sakai, Osaka, JP;
Kantatsu Co., Ltd, Yaita-shi, JP;
Norimichi Shigemitsu, Sakai, JP;
Yoshihito Ishizue, Sakai, JP;
Hisao Fukaya, Sukagawa, JP;
Kaoru Yamazaki, Sukagawa, JP;
Shingo Yuza, Sukagawa, JP;
SHARP KABUSHIKI KAISHA, Sakai, Osaka, JP;
KANTATSU Co., LTD, Yaita-shi, JP;
Abstract
It is possible to (i) cause a sixth lens to more effectively correct various aberrations and (ii) make an optical overall length shorter. A first lens (L) has positive refractive power. A fifth lens (L) and a sixth lens (L) each have negative refractive power. An object-side surface (LF) of the first lens (L) is a convex surface. At least one of an object-side surface and an image plane-side surface of each of a second lens (L), a third lens (L), a fourth lens (L), and the fifth lens (L) is an aspheric surface. An object-side surface (LF) of the sixth lens (L) is a concave surface and is an aspheric surface. An image plane-side surface (LR) of the sixth lens (L) is an optically planar surface throughout a region corresponding to an effective diameter of the image plane-side surface (LR) of the sixth lens (L).