Title:
ENDOSCOPE SYSTEM AND ADJUSTMENT METHOD FOR ENDOSCOPE SYSTEM
Document Type and Number:
WIPO Patent Application WO/2018/186123
Kind Code:
A1
Abstract:
An endoscope system comprising an objective optical system OBL, an optical path splitting unit 120, an imaging element 122, and an image processing unit 30, wherein a λ/4 wave plate 121a is disposed between the objective optical system OBL and the optical path splitting unit 120, the optical path splitting unit 120 comprises, in order from the object side, a first prism 121b and a second prism 121e, and has a beam splitting surface SL via which the first prism 121b and the second prism 121e are bonded together, and the optical path splitting unit 120 splits light into a first optical path that transmits P-polarized light and a second optical path that reflects S-polarized light by the beam splitting surface SL, adjusts the optical path length of the first optical path and the optical path length of the second optical path by sliding the beam splitting surface SL, is disposed at a position at which a displacement amount between the focal position of ordinary light and the focal position of extraordinary light is cancelled, and satisfies a specific conditional expression.
Inventors:
TSUYUKI HIROSHI (JP)
Application Number:
PCT/JP2018/009799
Publication Date:
October 11, 2018
Filing Date:
March 13, 2018
Export Citation:
Assignee:
OLYMPUS CORP (JP)
International Classes:
G02B23/26; A61B1/00; G02B5/04; G02B5/30
Domestic Patent References:
| WO2014002740A1 | 2014-01-03 | |||
| WO2008052405A1 | 2008-05-08 |
Foreign References:
| JP2012159784A | 2012-08-23 | |||
| JP2003107477A | 2003-04-09 | |||
| JPS62220919A | 1987-09-29 | |||
| JPH05164990A | 1993-06-29 | |||
| JP2012216599A | 2012-11-08 |
Attorney, Agent or Firm:
SAITO Keisuke (JP)
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