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Title:
OPTICAL SYSTEM FOR RIGID SCOPE, IMAGING DEVICE, AND ENDOSCOPIC SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/187874
Kind Code:
A1
Abstract:
[Problem] To reduce device size while maintaining reliability, and improve resolution of a captured image. [Solution] An optical system for a rigid scope according to the present invention comprises: an image-forming optical system for forming images in each of a fluorescence wavelength range and a visible wavelength range on an imaging element; and a color separation prism optical system having a dichroic film that separates the optical path for the image formation light into an optical path for the visible wavelength range and an optical path for the fluorescence wavelength range. The image-forming optical system forms an image on each of a fluorescence imaging element and a visible-light imaging element which are arranged such that a deviation between a fluorescence image formation position and visible-light image formation position caused by the image-forming optical system conforms to the difference in optical path length between the fluorescent light and the visible light transmitted through the color separation prism optical system to form an image. The image-forming optical system satisfies the condition represented by formula (1).

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Inventors:
KIKUCHI NAOMICHI (JP)
NAGAE SATOSHI (JP)
Application Number:
PCT/JP2019/007059
Publication Date:
October 03, 2019
Filing Date:
February 25, 2019
Export Citation:
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Assignee:
SONY CORP (JP)
International Classes:
G02B13/00; A61B1/00; G02B5/04; G02B23/26
Domestic Patent References:
WO2017217498A12017-12-21
Foreign References:
JP2017053890A2017-03-16
JPH11337819A1999-12-10
JP2014138196A2014-07-28
JP2004240464A2004-08-26
JP2000089105A2000-03-31
JP6088629B22017-03-01
JP2017053890A2017-03-16
JPS6147455B21986-10-20
Other References:
See also references of EP 3751325A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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