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. 10, 2023
Filed:
Oct. 10, 2018
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Takeharu Okuno, Utsunomiya, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/225 (2006.01); G02B 1/11 (2015.01); G02B 1/111 (2015.01); G02B 15/14 (2006.01); G02B 15/173 (2006.01); G02B 27/09 (2006.01); G02B 3/00 (2006.01);
U.S. Cl.
CPC ...
H04N 5/2254 (2013.01); G02B 1/11 (2013.01); G02B 1/111 (2013.01); G02B 15/144113 (2019.08); G02B 15/173 (2013.01); G02B 27/0955 (2013.01); H04N 5/2253 (2013.01);
Abstract
An optical element includes a plurality of substrates, an adhesive configured to adhere the plurality of substrates to each other, and an antireflection film provided to at least one of an incident surface and an exit surface of the optical element. The antireflection film includes a first layer including alcohol having at least one of an ether bond and an ester bond in a branched structure with 4 to 7 carbon atoms. A content of the alcohol in the first layer is 0.5 mg/cmto 5.0 mg/cm. The first layer has a refractive index of 1.1 to 1.3 for light with a wavelength of 550 nm.