OPTICAL SYSTEM, IMAGE PROJECTION DEVICE, AND IMAGING DEVICE

Title:

OPTICAL SYSTEM, IMAGE PROJECTION DEVICE, AND IMAGING DEVICE

Document Type and Number:

WIPO Patent Application WO/2023/243154

Kind Code:

A1

Abstract:

The present disclosure is an optical system including therein a middle imaging position MI conjugate with each of an enlargement conjugate point on an enlargement side and a reduction conjugate point on a reduction side, the optical system comprising: an enlargement optical system Op having a plurality of lens elements and positioned further on the enlargement side than the middle imaging position MI; and a relay optical system Ol having a plurality of lens elements and positioned further on the reduction side than the middle imaging position MI. A first lens element L1 positioned furthest on the enlargement side of the enlargement optical system Op has positive power. The optical system satisfies 0.9≤f1/f2≤1.5 (f1: focal length of the enlargement optical system Op, f2: focal length of the relay optical system Ol).

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Inventors:

IMAOKA TAKUYA

Application Number:

PCT/JP2023/006792

Publication Date:

December 21, 2023

Filing Date:

February 24, 2023

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Assignee:

PANASONIC IP MAN CO LTD (JP)

International Classes:

G02B15/20; G02B13/16; G02B15/167

Foreign References:

JP2014157209A	2014-08-28
JP2015219506A	2015-12-07
JP2015158587A	2015-09-03
US5677797A	1997-10-14

Attorney, Agent or Firm:

YAMAO, Norihito et al. (JP)

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