公开(公告)号：US11924938B2

公开(公告)日：2024-03-05

申请号：US17839091

申请日：2022-06-13

Applicant: MITUTOYO CORPORATION

Inventor： Tadashi Yamazaki ,  Yuto Konno ,  Hideki Morita ,  Nobuya Kaneko ,  Satoru Hirasawa

IPC: H05B45/34 ,  H05B45/18 ,  H05B45/56

CPC classification number: H05B45/34 ,  H05B45/18 ,  H05B45/56

Abstract: An illuminator includes: a light emitter including a light-emitting diode; a temperature sensor configured to detect a current temperature of the light emitter; and an illumination controller configured to adjust a drive voltage being supplied to the light emitter in accordance with the current temperature. The illumination controller includes a reference temperature storage in which a reference temperature is stored in advance and is configured to adjust the drive voltage by detecting the current temperature from the temperature sensor on a constant time cycle and comparing the current temperature with the reference temperature.