公开(公告)号：US10126547B2

公开(公告)日：2018-11-13

申请号：US15065969

申请日：2016-03-10

申请人： OLYMPUS CORPORATION

发明人： Masato Fujiwara ,  Atsuyoshi Shimamoto ,  Takeharu Innami ,  Junichi Nishimura

IPC分类号： G02B26/10 ,  A61B1/00 ,  A61B1/07 ,  G02B23/24

摘要： An optical fiber is vibrated at an emitting end part by a scanning part, and light is irradiated from an emitting end face of the optical fiber onto an object to scan the object. The scanning part includes a pair of first direction coils facing each other in a first direction across the emitting end part, and a permanent magnet installed as penetrating the emitting end part. The permanent magnet is magnetized in the axial direction of the emitting end part. The scanning part drives, by supplying power to the first direction coils, the emitting end part to vibrate in the first direction in the second or higher-order resonance mode, forming nodes of the vibration within the permanent magnet. When in a state of non-vibration in the first direction, a relative distance between the permanent magnet and the first direction coils is smaller than that in other directions.

公开(公告)号：US20190227303A1

公开(公告)日：2019-07-25

申请号：US16373721

申请日：2019-04-03

申请人： OLYMPUS CORPORATION

发明人： Masato Fujiwara

IPC分类号： G02B26/10 ,  G02B23/24

摘要： An optical scanning apparatus includes: an optical fiber that is configured to emit light from a distal end portion towards a subject; and a driving device that, when an AC signal having a driving frequency in proximity to an nth-order resonance frequency Fn of a vibrator including the distal end portion and a member vibrating integrally with the distal end portion is applied, generates a driving force for vibrating the distal end portion of the optical fiber in a plane orthogonal to a longitudinal direction of the optical fiber. The absolute value of the difference between the nth-order resonance frequency Fn and a neighboring (n±1)th-order resonance frequency Fn±1 of the vibrator is 0.25×Fn or less.

公开(公告)号：US10288876B2

公开(公告)日：2019-05-14

申请号：US15596051

申请日：2017-05-16

申请人： OLYMPUS CORPORATION

发明人： Masato Fujiwara ,  Morimichi Shimizu

IPC分类号： G02B26/10 ,  G02B23/24 ,  G02B23/26

摘要： This optical scanning actuator can improve yield and assembly efficiency. An optical scanning actuator (10) includes a piezoelectric element (14) that is joined to a displaceably supported emission end (11a) of an optical fiber (11) and displaces the emission end (11a) in a direction perpendicular to an optical axis direction of the optical fiber (11) by expanding and contracting in the optical axis direction. The piezoelectric element (14) includes an identifier (16) for identifying a polarization direction, the identifier (16) being formed physically.

公开(公告)号：US09651774B2

公开(公告)日：2017-05-16

申请号：US14340740

申请日：2014-07-25

申请人： OLYMPUS CORPORATION

发明人： Masato Fujiwara ,  Atsuyoshi Shimamoto ,  Junichi Nishimura

IPC分类号： G02B26/10 ,  G02B23/26 ,  G02B23/24 ,  A61B1/00 ,  G01J1/42 ,  A61B1/06 ,  H04N5/235

CPC分类号： G02B26/10 ,  A61B1/00006 ,  A61B1/00172 ,  A61B1/063 ,  G01J1/4257 ,  G02B23/2469 ,  G02B23/26 ,  G02B26/103 ,  H04N5/2354

摘要： Provided is an optical scanning observation apparatus including: a light source unit (30) for outputting laser light; a scanning part (23) for scanning, on an object of observation (70), a condensing position of the laser light output from the light source; and a detection unit (40) for sampling signal light obtained through scanning of the laser light, and converting the signal light into an electric signal, in which a sampling time for detecting signal light per one sampling is varied in accordance with changes in scanning rate of the scanning part (24) scanning on the object of observation (70). In this manner, variation in resolution of an image resulting from changes in scanning rate per each sampling can be reduced.