公开(公告)号：US20180313730A1

公开(公告)日：2018-11-01

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：US20160240998A1

公开(公告)日：2016-08-18

申请号：US15042627

申请日：2016-02-12

Applicant: MITUTOYO CORPORATION

Inventor： Ryunosuke YANO ,  Yusuke SHIRAKAWA ,  Tatsuya NARUMI

IPC: H01S3/13

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.

Abstract translation: 激光频率稳定器包括：将通过碘池的激光束转换为光输出信号的光检测器，根据接收的输出电压改变谐振器长度的致动器，以及控制单元，其控制输出电压 施加到致动器。 控制单元基于光输出信号搜索目标饱和吸收线，并且当发现目标饱和吸收线的输出电压在与目标饱和吸收线对应的预定正常电压范围内时，锁定振荡 激光束到目标饱和吸收线的频率。

公开(公告)号：US20140328359A1

公开(公告)日：2014-11-06

申请号：US14263205

申请日：2014-04-28

Applicant: MITUTOYO CORPORATION

Inventor： Ryunosuke YANO

IPC: H01S3/13

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：US20240077292A1

公开(公告)日：2024-03-07

申请号：US18450544

申请日：2023-08-16

Applicant: MITUTOYO CORPORATION

Inventor： Ryunosuke YANO

IPC: G01B3/00

CPC classification number: G01B3/004

Abstract: A one dimensional measuring machine includes a scale having graduations, a mover that has a light source configured to emit light to the graduations of the scale and a light receiving element configured to receive the light having passed through the scale from the light source, and can move along the scale, a light amount information detector that detects information regarding a light amount of the light emitted to the scale from the light source while the mover moves along the scale, and a contamination detector that detects a degree of contamination of the scale, based the information regarding the light amount of the light detected by the light amount information detector.

公开(公告)号：US20130195132A1

公开(公告)日：2013-08-01

申请号：US13739488

申请日：2013-01-11

Applicant: MITUTOYO CORPORATION

Inventor： Ryunosuke YANO ,  Hidekazu OOZEKI

IPC: G01N21/17 ,  H01S3/13

CPC classification number: G01N21/17 ,  H01S3/10069 ,  H01S3/13 ,  H01S3/1305 ,  H01S3/1392 ,  H01S3/1398

Abstract: A method for determining saturated absorption lines includes defining first and second threshold values based on an output value of a light output signal. The first and second threshold values are in a magnitude relationship. An output value of a second-order differential signal of the light output signal is compared with the first and second threshold values. A determination is made as to whether the second-order differential signal following a change in a resonator length has an output waveform that displays a behavior in which the output waveform changes from less than the second threshold value to be equal to or greater than the first threshold value, and then changes to be less than the second threshold value. Based on a result of the determination by the waveform determination, a determination is made as to whether the output waveform of the second-order differential signal is the saturated absorption line.

Abstract translation: 用于确定饱和吸收线的方法包括基于光输出信号的输出值来定义第一和第二阈值。 第一和第二阈值是大小关系。 将光输出信号的二阶差分信号的输出值与第一和第二阈值进行比较。 确定在谐振器长度的变化之后的二阶差分信号是否具有显示输出波形从小于第二阈值变为等于或大于第一阈值的行为的输出波形 阈值，然后更改为小于第二阈值。 基于通过波形确定的确定的结果，确定二阶差分信号的输出波形是否是饱和吸收线。