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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 11125987 B1

PDFFull Text
Date of Patent:
Sep. 21, 2021

Filed:

Mar. 27, 2019

Imaging optical system, projection display device, and imaging apparatus

Applicant:

Fujifilm Corporation, Tokyo, JP;

Inventors:

Yukiko Nagatoshi, Saitama, JP;

Masaru Amano, Saitama, JP;

Assignee:

FUJIFILM Corporation, Tokyo, JP;

Attorney:

Studebaker & Brackett PC

Primary Examiner:

Robert E Tallman

Int. Cl.
CPC ...
G02B 15/22 (2006.01); G02B 15/24 (2006.01); G02B 15/167 (2006.01); G02B 15/14 (2006.01); G03B 21/14 (2006.01); H04N 5/225 (2006.01); H04N 5/232 (2006.01); H04N 9/31 (2006.01); G02B 13/16 (2006.01);
U.S. Cl.
CPC ...
G02B 15/22 (2013.01); G02B 15/14 (2013.01); G02B 15/167 (2013.01); G02B 15/24 (2013.01); G03B 21/142 (2013.01); G02B 13/16 (2013.01); G03B 2205/0046 (2013.01); H04N 5/2254 (2013.01); H04N 5/23212 (2013.01); H04N 5/23296 (2013.01); H04N 9/3197 (2013.01);
Abstract

An imaging optical system consists of, in order from a magnification side: a first optical system that forms an intermediate image on a position conjugate to a magnification side imaging surface; and a second optical system that re-forms the intermediate image on a reduction side imaging surface. The first optical system includes at least two focusing lens groups that move with different loci during focusing. The imaging optical system satisfies predetermined conditional expressions relating to the focusing lens groups.

Find Patent Forward Citations

Nagatoshi, Yukiko. (2021). Imaging optical system, projection display device, and imaging apparatus (U.S. Patent No. 11125987). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11125987

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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