公开(公告)号：US20180325362A1

公开(公告)日：2018-11-15

申请号：US16045970

申请日：2018-07-26

Applicant: OLYMPUS CORPORATION

Inventor： Hiroshi TOSAKA ,  Masanori OGATA

IPC: A61B1/00 ,  A61B1/07

CPC classification number: A61B1/00172 ,  A61B1/00 ,  A61B1/00006 ,  A61B1/07 ,  G02B26/10

Abstract: An optical fiber scanning device includes a housing, an optical fiber configured to emit light, a magnet disposed on the optical fiber, four drive coils configured to drive the optical fiber by applying to the magnet a magnetic field generated by a received drive power signal, and four detection coils configured to output an induced electromotive force signal corresponding to variation of a magnetic field, wherein the drive power signal is controlled based on the induced electromotive force signal, and four coil assemblies each including any one of the drive coils and any one of the detection coils are disposed at rotationally symmetrical positions so as to interpose the optical fiber among the four coil assemblies.

公开(公告)号：US20180353056A1

公开(公告)日：2018-12-13

申请号：US16045915

申请日：2018-07-26

Applicant: OLYMPUS CORPORATION

Inventor： Hiroshi TOSAKA ,  Masanori OGATA

IPC: A61B1/00

CPC classification number: A61B1/00172 ,  A61B1/00 ,  A61B1/00006 ,  A61B1/00096 ,  A61B1/00165 ,  G02B26/10

Abstract: An optical fiber scanning system includes: an optical fiber with a magnet; four drive coils configured to apply a drive magnetic field generated using a drive power signal to the magnet; four detection coils configured to output a detection signal in response to variation of a magnetic field; a controller configured to perform feedback control of the drive power signal; a signal output circuit configured to output a drive signal; a voltage-current conversion circuit configured to convert the drive signal to the drive power signal; and a correction circuit configured to output a magnet magnetic field signal by removing the drive magnetic field signal from the detection signal, and the controller controls the signal output circuit based on the magnet magnetic field signal.