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:
Jan. 28, 2020
Filed:
Apr. 16, 2018
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Kenta Sudo, Utsunomiya, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 27/00 (2006.01); G02B 9/60 (2006.01); G02B 15/14 (2006.01); G02B 5/18 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0037 (2013.01); G02B 9/60 (2013.01); G02B 15/14 (2013.01); G02B 5/1814 (2013.01);
Abstract
Provided is an optical system comprising a cemented lens including a positive lens, a negative lens, and an optical element cemented to the positive lens and the negative lens in which the optical element is made of an ultraviolet curing resin. An internal transmittance at a wavelength of an ultraviolet ray at which the ultraviolet curing resin is cured per thickness of 10 mm of a material for a first lens which is arranged on an object side out of the positive lens and the negative lens, and a minimum value and a maximum value of a thickness of the first lens in an optical axis direction are appropriately set.