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. 22, 2018
Filed:
May. 20, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Takayoshi Yokoyama, Utsunomiya, JP;
Kentaro Mori, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image pickup optical system includes: from an object side to an image side, a first lens unit having a negative refractive power; a second lens unit having a positive refractive power; and a third lens unit having a negative refractive power. The first lens unit includes one negative lens or two negative lenses, the second lens unit includes a positive lens closest to the object side, and includes a plurality of lenses, the third lens unit includes, from the object side to the image side, a negative lens and a positive lens. A focal length f1 of the first lens unit, a focal length f3 of the third lens unit, a focal length fGr of the positive lens included in the third lens unit, an entire lens length L, and a focal length f of the image pickup optical system are set appropriately.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile