US 12,440,920 B2
Laser processing head and laser processing device
Keiji Narumi, Saitama (JP); and Mitsuoki Hishida, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Oct. 6, 2022, as Appl. No. 17/938,357.
Application 17/938,357 is a continuation of application No. PCT/JP2021/014947, filed on Apr. 8, 2021.
Claims priority of application No. 2020-078183 (JP), filed on Apr. 27, 2020.
Prior Publication US 2023/0023205 A1, Jan. 26, 2023
Int. Cl. B23K 26/06 (2014.01)
CPC B23K 26/0648 (2013.01) 5 Claims
OG exemplary drawing
 
1. A laser processing head that emits laser light including a first laser light having a first wavelength and a second laser light having a second wavelength, the laser processing head comprising:
a transmission fiber that transmits the laser light;
a collimator lens that collimates the laser light transmitted through the transmission fiber;
a focusing lens that condenses the laser light collimated by the collimator lens; and
a detector that detects diffusion light diffused by at least one of the collimator lens and the focusing lens, wherein
at least one of the collimator lens and the focusing lens is provided with an anti reflection coating (AR coating),
the AR coating has a first reflectance for reflecting the first laser light higher than a second reflectance for reflecting the second laser light, and
the detector has a first light receiving sensitivity for receiving the first laser light lower than a second light receiving sensitivity for receiving the second laser light.