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. 30, 2024
Filed:
Feb. 24, 2022
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Yuki Yoshimura, Tokyo, JP;
Koichi Fukuda, Tokyo, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 23/67 (2023.01); G06T 5/00 (2006.01); G02B 7/34 (2021.01);
U.S. Cl.
CPC ...
H04N 23/67 (2023.01); G06T 5/006 (2013.01); G02B 7/34 (2013.01); G06T 2207/10148 (2013.01);
Abstract
A focus detection device calculates a shift amount between a first focus detection signal and a second focus detection signal both generated based on a signal obtained from an image sensor. The device also calculates a conversion coefficient and applies the conversion coefficient to the shift amount to convert the shift amount into a defocus amount of an imaging optical system. The device calculates the conversion coefficient based on at least one of a pupil eccentricity amount and an incident pupil distance, both are dependent on an image height at a focus detection position.