公开(公告)号：US20220400543A1

公开(公告)日：2022-12-15

申请号：US17839091

申请日：2022-06-13

申请人： MITUTOYO CORPORATION

发明人： Tadashi YAMAZAKI ,  Yuto KONNO ,  Hideki MORITA ,  Nobuya KANEKO ,  Satoru HIRASAWA

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

摘要： 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.