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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.:

US 12019029 B1

PDFFull Text
Date of Patent:
Jun. 25, 2024

Filed:

Dec. 01, 2020

Optical system, and imaging apparatus and imaging system including the same

Applicant:

Canon Kabushiki Kaisha, Tokyo, JP;

Inventors:

Genichiro Kudo, Tochigi, JP;

Kazumi Kimura, Saitama, JP;

Hiroki Yoshida, Tochigi, JP;

Hiroto Kano, Tochigi, JP;

Assignee:

Canon Kabushiki Kaisha, Tokyo, JP;

Attorney:

Canon U.S.A., Inc. IP Division

Primary Examiner:

Dominic J Bologna

Int. Cl.
CPC ...
G01N 21/88 (2006.01); G01J 3/02 (2006.01); G01J 3/28 (2006.01); G01N 21/31 (2006.01); G01N 21/47 (2006.01); G01N 21/84 (2006.01); G02B 5/00 (2006.01); G02B 13/02 (2006.01); G02B 13/04 (2006.01); G02B 13/08 (2006.01); G02B 17/08 (2006.01); G02B 27/10 (2006.01); G02B 27/42 (2006.01); H04N 23/00 (2023.01);
U.S. Cl.
CPC ...
G01N 21/8851 (2013.01); G01J 3/021 (2013.01); G01N 21/314 (2013.01); G01N 21/47 (2013.01); G01N 21/8806 (2013.01); G02B 5/005 (2013.01); G02B 13/02 (2013.01); G02B 13/04 (2013.01); G02B 13/08 (2013.01); G02B 17/0836 (2013.01); G02B 17/0848 (2013.01); G02B 27/1086 (2013.01); G02B 27/4205 (2013.01); H04N 23/00 (2023.01); G01J 3/2823 (2013.01); G01N 2021/8466 (2013.01); G01N 2201/0635 (2013.01);
Abstract

Optical system includes front group, light-shielding member, and rear group that are arranged in this order in direction from object side toward image side. The light-shielding member is provided with opening elongated in first direction. The front group has aspherical surfaces, does not image the object at the opening in first section parallel to the first direction, and forms intermediate image of the object at the opening in second section perpendicular to the first direction. The rear group has diffractive surface that splits light beam that passes through the opening into light beams at different wavelengths in the second section and focuses the light beams on different locations in the second section. Tilt angles of the aspherical surfaces in the second section change in the first direction.

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