公开(公告)号：US20170364778A1

公开(公告)日：2017-12-21

申请号：US15540362

申请日：2015-05-19

Applicant: HITACHI, LTD.

Inventor： Takao WATANABE ,  Shigeki MORI ,  Ryo IMAI ,  Koichi WATANABE

IPC: G06K15/12 ,  G06K1/12 ,  B41M3/00 ,  G06K15/02 ,  B23K26/53

CPC classification number: G06K15/1276 ,  B23K26/0006 ,  B23K26/032 ,  B23K26/0624 ,  B23K26/0853 ,  B23K26/53 ,  B23K26/55 ,  B23K26/702 ,  B23K2103/54 ,  B41M3/00 ,  B41M5/26 ,  G06K1/121 ,  G06K15/023 ,  G06K15/1271 ,  G06K19/06037 ,  G06K19/06178

Abstract: It is an object of the present invention to improve visibility for observation with naked eyes or for camera shooting without spoiling the appearance during marking inside a. transparent medium using a laser. By irradiating an inside of a transparent medium with a laser, the present invention forms a micro-denatured region in each of a first layer and a second layer inside the medium. The micro-denatured regions in the respective layers are arranged out of alignment with each other on a two-dimensional plane (refer to FIG. 1).