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Title:
OBJECTIVE OPTICAL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/092619
Kind Code:
A1
Abstract:
Provided is a high-performance and bright objective optical system that is capable of focusing in response to a change in object distance and compatible with a small high-pixel imaging element. The objective optical system is characterized by: including, in the order from the object side, a first group G1 having positive refractive power, a second group G2 having negative refractive power, and a third group G3 having positive refractive power; performing focusing by moving the second group G2; and satisfying conditional expression (1): -18

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Inventors:
TAKATO HIDEYASU (JP)
Application Number:
PCT/JP2017/039866
Publication Date:
May 24, 2018
Filing Date:
November 06, 2017
Export Citation:
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Assignee:
OLYMPUS CORP (JP)
International Classes:
G02B13/04
Domestic Patent References:
WO2016006486A12016-01-14
WO2017119188A12017-07-13
WO2014155821A12014-10-02
WO2014132494A12014-09-04
WO2016084494A12016-06-02
Attorney, Agent or Firm:
SAITO Keisuke et al. (JP)
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