US 11,738,205 B2
Laser treatment apparatus
Samuel Bohman, Tokyo (JP); Hiroyuki Nishimura, Tokyo (JP); and Kazuyoku Tei, Tokyo (JP)
Assigned to JMEC CO., LTD., Tokyo (JP)
Filed by JMEC CO., LTD., Tokyo (JP)
Filed on Jun. 26, 2020, as Appl. No. 16/912,964.
Application 16/912,964 is a continuation in part of application No. PCT/JP2018/047268, filed on Dec. 21, 2018.
Claims priority of application No. 2017-249924 (JP), filed on Dec. 26, 2017.
Prior Publication US 2020/0324138 A1, Oct. 15, 2020
Int. Cl. A61N 5/06 (2006.01); A61B 18/20 (2006.01); A61N 5/073 (2006.01); A61N 5/067 (2006.01)
CPC A61N 5/0616 (2013.01) [A61B 2018/20357 (2017.05); A61N 5/067 (2021.08); A61N 2005/0631 (2013.01); A61N 2005/073 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A laser treatment apparatus that is configured to irradiate a laser beam to an affected area to treat the affected area, the laser treatment apparatus comprising:
a beam source device that is configured to output a laser beam;
a polarization varying device that includes a crystal element configured to change a polarization direction of the laser beam output by the beam source device;
a scanning device that is configured to scan a therapeutic range including the affected area with the laser beam by irradiating the laser beam to the therapeutic range, wherein the scanning device has a transmission medium that changes an output direction of a laser beam according to an applied voltage, and the transmission medium includes a first transmission medium that is configured to change an output direction of a laser beam polarized in a first direction by the polarization varying device according to an applied voltage;
a polarizer that is provided upstream of the first transmission medium in a path of the laser beam and is configured to transmit a laser beam having a polarization component that is either the same or orthogonal to that of the laser beam passing through the first transmission medium; and
a controller that controls the polarization varying device to adjust the polarization direction of the laser beam output from the polarization varying device based on a polarization direction of the polarizer.