Title:
OPTICAL FIBRE SCANNER, ILLUMINATION DEVICE, AND OBSERVATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/073948
Kind Code:
A1
Abstract:
The purposes of the present invention are to reduce the resonance frequency difference between the X-axis direction and the Y-axis direction in an optical fibre, and achieve stable scanning performance at the same resonance frequency. An optical fibre scanner (10) according to the present invention is provided with: an optical fibre (11); a vibration unit (19) which causes the optical fibre (11) to vibrate; and a fixing part (13) which fixes the optical fibre (11). The vibration unit (19) is provided with a piezoelectric element (12), and an elastic member (14) which transmits vibration of the piezoelectric element (12) to the optical fibre (11). The piezoelectric element (12) is provided with a first piezoelectrically active region (20), a second piezoelectrically active region (21), and a piezoelectrically inactive region (22) provided so as to fill a space between adjacent end surfaces of the first and second piezoelectrically active regions. Cross-sectional secondary moments of a cross-sectional shape in two axial directions which are orthogonal to the longitudinal axis of the optical fibre (11), and orthogonal to each other, said cross-sectional shape being formed from the piezoelectric element (12), the optical fibre (11), and the elastic member (14), are substantially the same at the position of the vibration unit (19).
Inventors:
YASUMI TAKASHI (JP)
KASAI YASUAKI (JP)
TSURUTA HIROSHI (JP)
YOKOTA HIROKAZU (JP)
KASAI YASUAKI (JP)
TSURUTA HIROSHI (JP)
YOKOTA HIROKAZU (JP)
Application Number:
PCT/JP2016/081176
Publication Date:
April 26, 2018
Filing Date:
October 20, 2016
Export Citation:
Assignee:
OLYMPUS CORP (JP)
International Classes:
A61B1/00
Domestic Patent References:
| WO2016075758A1 | 2016-05-19 |
Foreign References:
| JP2014044265A | 2014-03-13 | |||
| JP5981071B1 | 2016-08-31 |
Attorney, Agent or Firm:
UEDA, Kunio et al. (JP)
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