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Title:
OBJECTIVE OPTICAL SYSTEM, OPTICAL UNIT, AND ENDOSCOPE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/190280
Kind Code:
A1
Abstract:
An objective optical system (10) comprises: a first lens (1) and a second lens (2) which are arranged in order from the object side, along the main optical axis (A). The first lens (1) has a partially spherical shape having a first flat surface (1a). The second lens (2) has a partially spherical shape having a second flat surface (2a). The first flat surface (1a) is disposed on the object side, and is inclined with respect to the main optical axis (A). The second flat surface (2a) is disposed on the side opposite the object side, and is perpendicular to the main optical axis (A).

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Inventors:
MIKI TAKEHIRO (JP)
NAMIKI MITSURU (JP)
Application Number:
PCT/JP2021/009600
Publication Date:
September 15, 2022
Filing Date:
March 10, 2021
Export Citation:
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Assignee:
OLYMPUS CORP (JP)
International Classes:
G02B13/00; A61B1/00
Domestic Patent References:
WO2019111360A12019-06-13
WO2020008613A12020-01-09
Foreign References:
JPS59166219U1984-11-07
JPH05297269A1993-11-12
JP2012008489A2012-01-12
JP2001124990A2001-05-11
JP2009134305A2009-06-18
JP2007515211A2007-06-14
JP2004287435A2004-10-14
Attorney, Agent or Firm:
UEDA, Kunio et al. (JP)
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