公开(公告)号：US10914661B2

公开(公告)日：2021-02-09

申请号：US15963308

申请日：2018-04-26

Applicant: MITUTOYO CORPORATION

Inventor： Ryunosuke Yano ,  Masanobu Kataoka

IPC: G01N3/42

Abstract: A hardness tester includes an indenter, an arm and a driver which loads a test force onto the indenter and press the indenter against a sample, a spring displacement amount sensor detecting a value for the test force loaded onto the indenter, and a controller. In a state where a predetermined test force (total test force) is loaded onto the indenter by the driver, when the value of the test force detected by the spring displacement amount sensor exceeds a predefined allowable margin relative to the predetermined test force, the controller executes predetermined processes, including an interrupt process interrupting the test currently being executed and a notification process notifying a user that the value of the test force exceeded the allowable margin during execution of the test.

公开(公告)号：US09231364B2

公开(公告)日：2016-01-05

申请号：US14263205

申请日：2014-04-28

Applicant: MITUTOYO CORPORATION

Inventor： Ryunosuke Yano

IPC: H01S3/13 ,  H01S3/139 ,  H01S3/109 ,  H01S3/131 ,  H01S3/08 ,  H01S3/0941 ,  H01S3/16 ,  H01S5/062 ,  H01S5/068 ,  H01S3/02

CPC classification number: H01S3/1305 ,  H01S3/025 ,  H01S3/08027 ,  H01S3/09415 ,  H01S3/109 ,  H01S3/1312 ,  H01S3/1392 ,  H01S3/1611 ,  H01S3/1673 ,  H01S5/06213 ,  H01S5/06804

Abstract: A laser light generator emits laser light, a frequency of which can be adjusted. A laser light detector bombards an iodine cell with the laser light and photoelectrically converts the laser light that has passed through the iodine cell, then outputs a light output signal. A third order differential lock-in amplifier generates a third order differential signal of the light output signal. A frequency locker causes the laser light generator to change the frequency of the laser light within a predetermined range, detects an amplitude corresponding to a saturated absorption line occurring in the third order differential signal, and causes the frequency of the laser light to stabilize to a predetermined value. An error detector outputs an error signal in a case where the amplitude corresponding to the saturated absorption line occurring in the third order differential signal is greater than a predetermined value.

Abstract translation: 激光发生器发射激光，其频率可以调节。 激光检测器用激光轰击碘池，并对通过碘池的激光进行光电转换，然后输出光输出信号。 三阶差分锁相放大器产生光输出信号的三阶微分信号。 频率锁定器使激光发生器将激光的频率改变到预定范围内，检测与三阶微分​​信号中出现的饱和吸收线对应的振幅，并使激光的频率稳定在 预定值。 在与三阶差分信号中发生的饱和吸收线对应的振幅大于预定值的情况下，误差检测器输出误差信号。

公开(公告)号：US09825423B2

公开(公告)日：2017-11-21

申请号：US15042627

申请日：2016-02-12

Applicant: MITUTOYO CORPORATION

Inventor： Ryunosuke Yano ,  Yusuke Shirakawa ,  Tatsuya Narumi

IPC: H01S3/13 ,  H01S3/139

CPC classification number: H01S3/1305 ,  H01S3/1392

Abstract: A laser-frequency stabilizer includes: a light detector that converts a laser beam passing through an iodine cell to an optical output signal, an actuator that changes a resonator length in accordance with a received output voltage, and a control unit that controls the output voltage applied to the actuator. The control unit searches for a target saturated absorption line based on the optical output signal and, when the output voltage when the target saturated absorption line is found is within a normal voltage range that is predetermined corresponding to the target saturated absorption line, locks a oscillation frequency of the laser beam to the target saturated absorption line.