公开(公告)号：US20170373463A1

公开(公告)日：2017-12-28

申请号：US15617307

申请日：2017-06-08

Applicant: MITUTOYO CORPORATION

Inventor： Tatsuya NARUMI ,  Yoichi TOIDA

IPC: H01S3/131 ,  H01S3/02 ,  H01S3/04 ,  H01S3/13 ,  H01S3/106 ,  H01S3/109 ,  H01S3/137 ,  H01S3/16 ,  G02F1/355

Abstract: A laser adjustment method includes a first adjustment step and a second adjustment step. In the first adjustment step, using a light detector detecting a second harmonic light, optical intensity and wavelength of the second harmonic light is detected and a first temperature adjuster is adjusted to adjust temperatures of a Nd:YVO4 crystal and a KTP crystal such that the detected wavelength of the second harmonic light approaches a desired wavelength and such that the optical intensity of the second harmonic light reaches at least a predetermined value. In the second adjustment step, after the first adjustment step, a temperature of an etalon is adjusted by a second temperature adjuster such that the detected wavelength of the second harmonic light approaches the desired wavelength and such that the optical intensity of the second harmonic light reaches at least a predetermined value.

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：US20180335290A1

公开(公告)日：2018-11-22

申请号：US15962283

申请日：2018-04-25

Applicant: MITUTOYO CORPORATION

Inventor： Tatsuya NARUMI ,  Akihiko MATSUURA ,  Kentaro YANO

IPC: G01B3/30 ,  G01B5/20 ,  G01B21/04

Abstract: A step gauge includes: measurement blocks each having reference measurement surfaces; interval blocks each interposed between a pair of ones of the measurement blocks to keep a distance between the pair of ones of the measurement blocks at a predetermined distance, the measurement blocks and the interval blocks being alternately aligned one by one in one direction. The measurement blocks and the interval blocks each have a coefficient of linear thermal expansion of less than 0.03×10−6(1/K) and have through holes aligned in the one direction. The step gauge further includes a tie rod inserted in the through holes and countersunk screws respectively fixed to ends of the tie rod. The tie rod is made of a material having a coefficient of linear thermal expansion of less than 0.5×10−6(1/K).

公开(公告)号：US20160118769A1

公开(公告)日：2016-04-28

申请号：US14887463

申请日：2015-10-20

Applicant: MITUTOYO CORPORATION

Inventor： Tatsuya NARUMI

IPC: H01S5/024 ,  H01S3/16 ,  H01S5/022 ,  H01S3/105 ,  H01S3/094

CPC classification number: H01S3/042 ,  H01S3/025 ,  H01S3/0401 ,  H01S3/0405 ,  H01S3/09415 ,  H01S3/105 ,  H01S3/1062 ,  H01S3/109 ,  H01S3/1392 ,  H01S3/1611 ,  H01S3/1673

Abstract: An optical resonator includes a casing and various optical elements (laser crystal, SHG, etalon, movable mirror) provided within the casing. The optical resonator causes light from the excited laser crystal to resonate and, using the etalon, emits single longitudinal mode laser light. The casing is formed with a low thermal expansion metal exhibiting a thermal expansion coefficient within a range of 0.1 to 3.0×10−6K−1 and thermal conductivity within a range of 10 to 15 W·m−1·K−1. A first temperature control system controlling the temperature of the laser crystal and SHG to be a constant temperature is provided at a placement portion of the laser crystal and SHG. An angle adjuster adjusting an incident angle of the etalon and a second temperature control system controlling the temperature of the etalon to be a constant temperature are provided at a placement portion of the etalon.

Abstract translation: 光学谐振器包括壳体和设置在壳体内的各种光学元件（激光晶体，SHG，标准具，可移动反射镜）。 光谐振器使来自激发的激光晶体的光谐振，并且使用标准具发射单个纵模激光。 壳体由热膨胀系数在0.1〜3.0×10-6K-1的范围内，导热率在10〜15W·m-1·K-1的范围内的低热膨胀性金属形成。 在激光晶体和SHG的放置部分设置有控制激光晶体的温度和SHG为恒定温度的第一温度控制系统。 在标准具的放置部分设置有将标准具的入射角和将标准具的温度控制为恒定温度的第二温度控制系统的角度调节器。

公开(公告)号：US20140291497A1

公开(公告)日：2014-10-02

申请号：US14206439

申请日：2014-03-12

Applicant: MITUTOYO CORPORATION

Inventor： Hiroatsu MORI ,  Tatsuya NARUMI

IPC: G01D5/26

CPC classification number: G01D5/268 ,  G01D5/34753

Abstract: An optical encoder includes a light source fiber holder holding a light source fiber and a collecting lens therein, and a nut. The light source fiber holder includes an end fitting together with a light source base. An outer circumferential surface of the end includes an inclined surface inclining such that a cross-sectional area increases as the surface approaches the light source fiber; and a projection capable of advancing into a groove of the light source base. The optical encoder includes a light source connector and the light source fiber holder.

Abstract translation: 光学编码器包括保持光源纤维和收集透镜的光源光纤保持器和螺母。 光源光纤保持器包括与光源基座一起配合的端部。 端部的外周面包括倾斜表面，使得横截面积随着表面接近光源光纤而增加; 以及能够前进到光源基座的凹槽中的突起。 光学编码器包括光源连接器和光源光纤保持器。