US 12,402,779 B2
Endoscope and endoscope system
Takuji Suzuki, Hachioji (JP); and Kazuhiko Hino, Hachioji (JP)
Assigned to OLYMPUS CORPORATION, Tokyo (JP)
Filed by OLYMPUS CORPORATION, Tokyo (JP)
Filed on Aug. 29, 2022, as Appl. No. 17/897,610.
Application 17/897,610 is a continuation of application No. PCT/JP2020/009256, filed on Mar. 4, 2020.
Prior Publication US 2022/0409022 A1, Dec. 29, 2022
Int. Cl. A61B 1/00 (2006.01); A61B 1/018 (2006.01); A61B 1/06 (2006.01)
CPC A61B 1/00096 (2013.01) [A61B 1/00009 (2013.01); A61B 1/00091 (2013.01); A61B 1/018 (2013.01); A61B 1/0676 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An endoscope comprising:
an objective optical unit comprising:
a lens;
a lens frame holding the lens; and
an actuator configured to move the lens frame in a direction of an optical axis, the actuator including a plurality of magnets and a coil; and
a plurality of internal components made of magnetic material and arranged around the objective optical unit,
wherein the plurality of internal components are other than portions comprising the actuator;
at least one of the plurality of internal components is arranged at a position where at least a part of the at least one of the plurality of internal components intersects a straight line connecting an extreme point of one of valleys of a specific isomagnetic line of magnetic fields formed by the plurality of magnets and one of two inflection points of the specific isomagnetic line, the one of the valleys positioned between the two inflection points; and
each of the plurality of internal components are fixed relative to the lens frame.