公开(公告)号：US11510643B2

公开(公告)日：2022-11-29

申请号：US17024061

申请日：2020-09-17

Applicant: MITUTOYO CORPORATION

Inventor： Hidemitsu Asano ,  Masato Kon

IPC: A61B6/00 ,  A61B6/03 ,  A61B6/04

Abstract: Volume data is generated by performing a CT scan with a spherical calibration jig having known dimensions in contact with an object. A profile of the surface shape of the object in the volume data is obtained, and a boundary surface of the spherical calibration jig is calculated from the center coordinates of the spherical calibration jig. A correction value for adjusting a boundary surface of the object determined from the gradient of the profile to the boundary surface of the spherical calibration jig is determined, and the boundary surface of the object is corrected by using the correction value. The shape of the object is determined by using the corrected boundary surface. The precision of measurement X-ray CT can thus be increased by accurately detecting the boundary surface of the object.

公开(公告)号：US11506518B2

公开(公告)日：2022-11-22

申请号：US17529476

申请日：2021-11-18

Applicant: Mitutoyo Corporation

Inventor： Yoshiaki Kato ,  Miyako Mizutani

IPC: G01D5/34 ,  G01D5/347

Abstract: The photoelectric rotary encoder includes: a generally disk-shaped scale with a grating-like pattern formed with a predetermined period along a measurement direction, the measurement direction being a direction of rotation of a measurement target that rotates on a predetermined axis, the scale being plate-like and centered on an axis of rotation; and a head that detect, from the scale, the amount of displacement caused by the rotation of the measurement target. The head includes a light source, a diffraction unit with grating parts, and a light-receiving unit with light-receiving elements. The grating parts of the diffraction unit are formed as deformed grating parts that spread cut wide, from the center on the axis of rotation, along the grating-like pattern of the scale. The light-receiving elements are formed as linear grating parts.

公开(公告)号：US11499821B2

公开(公告)日：2022-11-15

申请号：US16805516

申请日：2020-02-28

Applicant: Mitutoyo Corporation

Inventor： Teppei Ohno ,  Mao Kikuchi

IPC: G01B3/22 ,  G01B21/04

Abstract: A gauge inspection jig for performing an inspection easily and accurately in a reverse posture with a contact point facing upward when a gauge is inspected. The gauge inspection jig includes a body portion and a coupling portion. The body portion holds a member mounted to a body portion of the gauge. This holds the gauge in the reverse posture. The coupling portion is coupled to the body portion. The coupling portion is couplable to a distal end of a measurement spindle disposed on a gauge inspector to be movable in a measurement axis direction.

公开(公告)号：US11474285B2

公开(公告)日：2022-10-18

申请号：US17141507

申请日：2021-01-05

Applicant: MITUTOYO CORPORATION

Inventor： Shiro Igasaki ,  Yuki Kurahashi

IPC: G02B3/14 ,  G02B7/10

Abstract: A variable focal length lens device includes: a lens system of a liquid resonant type whose refractive index is changed in response to a drive signal to be inputted; a temperature sensor configured to acquire temperature information of the lens system; and a drive controller configured to control the lens system. The drive controller includes: a resonant frequency estimation unit configured to calculate an estimated value of a resonant frequency of the lens system on a basis of the temperature information; and a starting frequency setting unit configured to set a starting frequency of the lens system on a basis of the estimated value of the resonant frequency.

公开(公告)号：US20220311399A1

公开(公告)日：2022-09-29

申请号：US17698417

申请日：2022-03-18

Applicant: Mitutoyo Corporation

Inventor： Shu Hirata ,  Tomohiro Tahara ,  Akio Kawai ,  Shun Mugikura

IPC: H03F3/45

Abstract: A preamplifier amplifies signals input to first and second input terminals. A first switching circuit receives first and second input signals and outputs those to the first and second input terminals. A switched capacitor circuit samples two signals amplified by the preamplifier. Differential signals sampled by the switched capacitor circuit are respectively input to third and fourth input terminals of an integration circuit, and the integration circuit outputs differential signals obtained by those input signals to first and second output terminals. A second switching circuit switches a connection relationship between the switched capacitor circuit and the integration circuit. Each time the cycle changes, the first and second switching circuits switch the connection relationships to cause the signals amplified by the preamplifier to be sampled by double correlation sampling.

公开(公告)号：USD962869S1

公开(公告)日：2022-09-06

申请号：US29737944

申请日：2020-06-12

Applicant: MITUTOYO CORPORATION

Designer： Shigeru Ohtani ,  Takayuki Yonezawa ,  Rie Arai ,  Motohiro Osaki

公开(公告)号：US11430105B2

公开(公告)日：2022-08-30

申请号：US16902181

申请日：2020-06-15

Applicant: Mitutoyo Corporation

Inventor： William Todd Watson ,  Robert Kamil Bryll ,  Shannon Roy Campbell

IPC: G06T7/00

Abstract: A workpiece inspection and defect detection system includes a light source, a lens that inputs image light arising from a surface of a workpiece, and a camera that receives imaging light transmitted along an imaging optical path. The system utilizes images of workpieces acquired with the camera as training images to train a defect detection portion to detect defect images that include workpieces with defects. Anomaly detector classification characteristics are determined based on features of the training images. Run mode images of workpieces are acquired with the camera, and based on determined features from the images, the anomaly detector classification characteristics are utilized to determine if the images of the workpieces are classified as anomalous. In addition, the defect detection portion determines if images are defect images that include workpieces with defects and for which additional operations may be performed (e.g., metrology operations for measuring dimensions of the defects, etc.)

公开(公告)号：US20220270274A1

公开(公告)日：2022-08-25

申请号：US17740763

申请日：2022-05-10

Applicant: Mitutoyo Corporation

Inventor： Kaoru Miyata

IPC: G06T7/521 ,  G06T7/60 ,  G06T7/593

Abstract: A three-dimensional geometry measurement apparatus including: a relationship identification part that identifies a combination of a first imaging pixel and a projection pixel of a projection image; a determination part that determines, for the combination of the first imaging pixel and the projection pixel, whether or not the combination includes a defective pixel on the basis of a distance between (i) a second imaging pixel corresponding to the same projection coordinate as a projection coordinate corresponding to the first imaging pixel and (ii) a second imaging pixel corresponding to the projection coordinate of the projection pixel and located on an epipolar line of a second captured image corresponding to the projection coordinate; and a geometry measurement part that measures a geometry of an object to be measured using at least one of the first imaging pixel excluding the defective pixel or the second imaging pixel excluding the defective pixel.

公开(公告)号：US11422010B2

公开(公告)日：2022-08-23

申请号：US17101270

申请日：2020-11-23

Applicant: MITUTOYO CORPORATION

Inventor： Hiroto Kubozono

IPC: G01D5/20 ,  G01D5/249

Abstract: An electromagnetic induction type encoder includes a detection head and a scale. The detection head has a first transceiver coil to generate magnetic flux with respect to a first track and a second transceiver coil to generate magnetic flux with respect to a second track. The scale has a first plurality of periodical elements with respect to the first track and a second plurality of periodical elements with respect to the second track. The detection head has a receiver coil that continuously extends from the first track to the second track, is electromagnetically coupled with the magnetic flux generated by the first plurality of periodical elements and the magnetic flux generated by the second plurality of periodical elements, and detects a phase of the magnetic flux generated by the first plurality of periodical elements and a phase of the magnetic flux generated by the second plurality of periodical elements.

公开(公告)号：USD957961S1

公开(公告)日：2022-07-19

申请号：US29769336

申请日：2021-02-04

Applicant: MITUTOYO CORPORATION

Designer： Kentaro Nemoto ,  Yoshihiko Sugita ,  Jun Odake ,  Aoi Shimizu