公开(公告)号：US20170161904A1

公开(公告)日：2017-06-08

申请号：US15364543

申请日：2016-11-30

Applicant: MITUTOYO CORPORATION

Inventor： Hiroshi SAKAI ,  Takeshi SAEKI

IPC: G06T7/00 ,  H04N5/247 ,  G01B11/02

CPC classification number: G06T7/50 ,  G01B11/022 ,  H04N5/232 ,  H04N5/247

Abstract: An image measurement device according to the present invention comprises: a stage on which a measurement object is mounted; an imaging device imaging the measurement object for a certain imaging range and outputting image information; a position control device that moves the imaging device to a plurality of measurement positions and scans in a scanning direction; and an arithmetic processing device that calculates a displacement of the measurement object. The imaging device is configured capable of imaging a preliminary measurement range broader than the certain imaging range. The arithmetic processing device, prior to a main measurement that measures the displacement of the measurement object at each measurement position, makes a preliminary measurement based on the image information corresponding to the preliminary measurement range, and sets a scanning range of the imaging device at each measurement position during the main measurement based on a result of this preliminary measurement.

公开(公告)号：US20190271898A1

公开(公告)日：2019-09-05

申请号：US16291357

申请日：2019-03-04

Applicant: MITUTOYO CORPORATION

Inventor： Hiroshi SAKAI

IPC: G02F1/29

Abstract: In a variable focal length lens control method, a plurality of candidate planes are defined at different focal lengths of a variable focal length lens, an image of a measurable object is detected by an image detector at each of the candidate planes, contrast in each of the detected images is calculated, any of the candidate planes is selected based on the contrast, and a focal length of the selected candidate plane is defined for a lens controller.

公开(公告)号：US20190353872A1

公开(公告)日：2019-11-21

申请号：US16415190

申请日：2019-05-17

Applicant: MITUTOYO CORPORATION

Inventor： Hiroshi SAKAI ,  Yutaka WATANABE ,  Gyokubu CHO

IPC: G02B7/10 ,  H04N5/225 ,  G02B21/24

Abstract: A variable focal length lens device includes: a lens system whose refractive index changes in accordance with a drive signal to be inputted; an objective lens disposed on the same optical axis as the lens system; an image detector configured to detect an image of a measurement target through the lens system and the objective lens: a resonance-lock controller configured to tune the drive signal to a resonance frequency of the lens system; and a resonance-lock delay controller configured to divide a change in a frequency of the drive signal by a change amount set by the resonance-lock controller to step-by-step changes for n times by a preset reference value to delay the change in the frequency of the drive signal.

公开(公告)号：US20180314033A1

公开(公告)日：2018-11-01

申请号：US15951599

申请日：2018-04-12

Applicant: MITUTOYO CORPORATION

Inventor： Hiroshi SAKAI ,  Yutaka WATANABE

IPC: G02B7/10 ,  H04N5/225 ,  H04N5/232 ,  G06F3/048 ,  G02B15/14

CPC classification number: G02B7/102 ,  G02B3/14 ,  G02B7/04 ,  G02B15/04 ,  G02B15/14 ,  G06F3/048 ,  H04N5/2254 ,  H04N5/2256 ,  H04N5/23203 ,  H04N5/23216

Abstract: A variable focal length lens device includes: a lens system whose refractive index is variable in response to an inputted drive signal; an image detector for detecting an image of a target object through the lens system; a lens controller for outputting the drive signal and an illumination signal; and a lens operation unit for adjusting a frequency and amplitude of the drive signal outputted by the lens controller and an image-detection timing for the image detector. The lens controller includes a resonance-lock controller for tuning the drive signal to a resonance frequency of the lens system. The lens operation unit includes a resonance-lock operation unit for switchably enabling and suspending the resonance-lock controller.

公开(公告)号：US20170248415A1

公开(公告)日：2017-08-31

申请号：US15433234

申请日：2017-02-15

Applicant: MITUTOYO CORPORATION

Inventor： Sadayuki MATSUMIYA ,  Shuichi KAMIYAMA ,  Hidemitsu ASANO ,  Hiroshi SAKAI ,  Hiromu MAIE ,  Yoshihiko TAKAHASHI ,  Masanori ARAI ,  Ken MOTOHASHI

IPC: G01B11/30 ,  G01B5/012 ,  G01B9/02

CPC classification number: G01B11/30 ,  G01B5/003 ,  G01B5/012 ,  G01B5/061 ,  G01B5/12 ,  G01B9/02 ,  G01B9/02041 ,  G01B11/0608 ,  G01B11/12 ,  G01B11/2441 ,  G01B11/303

Abstract: A surface texture measuring apparatus includes an X axis displacement mechanism and a Y axis displacement mechanism displacing a measurable object having an interior wall along an XY plane; a measurement sensor measuring a surface texture of the interior wall without contact; a Z axis displacement mechanism displacing the measurement sensor in a Z axis direction orthogonal to the XY plane and bringing the measurement sensor to face the interior wall; a W axis displacement mechanism displacing the measurement sensor facing the interior wall in a normal direction of the interior wall; and a θ axis displacement mechanism displacing the measurement sensor facing the interior wall along the interior wall.

公开(公告)号：US20170248409A1

公开(公告)日：2017-08-31

申请号：US15439019

申请日：2017-02-22

Applicant: MITUTOYO CORPORATION

Inventor： Hiroshi SAKAI ,  Tomonori GOTO

IPC: G01B11/24

CPC classification number: G01B11/2441 ,  G01B2210/52

Abstract: According to an embodiment of the present invention, a method of measuring a shape based on reflected light from a surface of an object irradiated with light from a measurement head, includes: acquiring a first measurement result by setting a measurement condition suitable for the measurement of a first region of the object and by measuring a first scanning range of the surface with a first scanning pitch; determining a second region of the surface except the first region from the first measurement result; and acquiring a second measurement result by setting a measurement condition suitable for the measurement of the second region and by measuring a second scanning range of the surface narrower than the first scanning range with a second scanning pitch finer than the first scanning pitch.

公开(公告)号：US20140152805A1

公开(公告)日：2014-06-05

申请号：US14091915

申请日：2013-11-27

Applicant: Mitutoyo Corporation

Inventor： Takeshi SAEKI ,  Hiroshi SAKAI

IPC: G01B11/14 ,  H04N7/18

CPC classification number: G01B11/14 ,  G01B11/005 ,  G01B21/047 ,  H04N7/18

Abstract: An orthogonal state measuring device includes a measurement table and a CCD camera displacing in X, Y, and Z directions relative to the measurement table and measuring a work piece placed on the measurement table. The orthogonal state measuring device further includes a wide angle surveillance camera, a computer main body, and a display. The wide angle surveillance camera captures in one pass an image that is capable of configuring a bird's-eye image of the work piece, the bird's-eye image encompassing an entire field over which the CCD camera is capable of relative displacement. The computer main body generates the bird's-eye image based on the image and defines a position of the CCD camera on the bird's-eye image, then configures navigation maps in which the position of the CCD camera is composited on the bird's-eye image. The display displays the navigation maps.

Abstract translation: 正交状态测量装置包括测量台和相对于测量台在X，Y和Z方向上移位的CCD照相机，并测量放置在测量台上的工件。 正交状态测量装置还包括广角监视摄像机，计算机主体和显示器。 广角监视摄像机一次拍摄能够配置工件的鸟瞰图像的图像，鸟瞰图像包围CCD相机能够相对位移的整个场。 计算机主体基于图像产生鸟瞰图像，并且将CCD摄像机的位置定义在鸟瞰图像上，然后将将CCD摄像机的位置合成在鸟瞰图像上的导航图配置。 显示屏显示导航地图。

公开(公告)号：US20200208965A1

公开(公告)日：2020-07-02

申请号：US16717320

申请日：2019-12-17

Applicant: MITUTOYO CORPORATION

Inventor： Satoru YOSHIDA ,  Tatsuya NAGAHAMA ,  Hitoshi ISOBE ,  Masafumi YAMANAKA ,  Naoto OITA ,  Koji KUBO ,  Yuko SHISHIDO ,  Nobuo OHBA ,  Takahisa OOTAKE ,  Hiroki MATSUI ,  Masanori ARAI ,  Shiro IGASAKI ,  Yuki KURAHASHI ,  Hiroshi SAKAI ,  Yutaka WATANABE

IPC: G01B11/24 ,  G02B21/36 ,  H04N5/225

Abstract: An image measurement apparatus, which functions as a non-contact profile-measuring device, includes: an image sensor as an image pick-up device; a variable focal length lens (liquid lens unit) disposed on an optical axis extending from a workpiece to the image sensor; and a controller (image-pickup lens controller and image measurement processor) configured to control the variable focal length lens and process a detected image by the image sensor. The image measurement apparatus, which also functions as a non-contact displacement-detecting device, includes: an image sensor; a variable focal length lens (liquid lens unit) disposed on an optical axis extending from the workpiece to the image sensor; and a controller (displacement-detection lens controller and profile measurement processor) configured to control the variable focal length lens and a detected image by the image sensor.

公开(公告)号：US20190356860A1

公开(公告)日：2019-11-21

申请号：US16414148

申请日：2019-05-16

Applicant: MITUTOYO CORPORATION

Inventor： Hiroshi SAKAI ,  Yutaka WATANABE

IPC: H04N5/232 ,  G02B7/04 ,  G02B26/00 ,  G02B3/14 ,  H04N17/00

Abstract: A calibration method of a variable-focal-length lens including a liquid lens unit whose focal-length is periodically varied in response to a periodic drive-signal includes: using a calibration tool having a plurality of height-different parts on a surface; preparing a calibration table by repeating outputting a drive-signal having a predetermined voltage to the variable-focal-length lens, detecting a surface image of the calibration tool using an image detector, detecting two points having maximum image contrast in the surface image, calculating a focal-depth from a difference in a focal-length between the two points; and recording the focal-depth and the voltage of the drive-signal in a corresponding combination, and retrieving a value of the voltage corresponding to a desired focal-depth from the calibration table to set the variable-focal-length lens at the desired focal-depth, and adjusting the voltage of the drive-signal outputted to the variable-focal-length lens based on the retrieved value.

公开(公告)号：US20190353976A1

公开(公告)日：2019-11-21

申请号：US16415306

申请日：2019-05-17

Applicant: MITUTOYO CORPORATION

Inventor： Yutaka WATANABE ,  Hiroshi SAKAI

IPC: G02F1/29 ,  H04N5/225 ,  H04N5/232

Abstract: A variable focal length lens device includes an image-detection-condition setting unit configured to set image detection conditions. The image-detection-condition setting unit is configured to set, as image detection conditions, a combined mode of repeating an image detection loop including at least one multi-plane-image-detecting operation and at least one single-plane-image-detecting operation. In the multi-plane-image-detecting operation, a plurality of values of the focal length, at each of which the image detection is performed, are set in one cycle in which the focal length of the variable focal length lens is varied. In the single-plane-image-detecting operation, a single value of the focal length, at which the image detection is performed, is set in one cycle in which the focal length of the variable focal length lens is varied.