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公开(公告)号：US20200073024A1
公开(公告)日：2020-03-05
申请号：US16549323
申请日：2019-08-23
申请人： MITUTOYO CORPORATION
发明人： Shiro IGASAKI , Nobuo OOBA
摘要： A variable focal length lens apparatus includes a liquid lens apparatus in which the refractive index changes in accordance with an input drive signal, and a drive controller that outputs the drive signal to the liquid lens apparatus. The drive controller includes a resonance lock controller that changes a frequency of the drive signal by tracking the drive signal to a resonance frequency of the liquid lens apparatus, and a tracking delayer that delays a change in the frequency of the drive signal that is due to the resonance lock controller.
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公开(公告)号：US20200073025A1
公开(公告)日：2020-03-05
申请号：US16556546
申请日：2019-08-30
申请人： MITUTOYO CORPORATION
发明人： Shiro IGASAKI , Nobuo OOBA , Masaki OKAYASU , Yuki KURAHASHI
摘要： A variable focal length lens apparatus includes a liquid lens apparatus in which the refractive index changes in accordance with an input drive signal, and a refractive power controller that controls refractive power of the lens system. The refractive power controller adjusts the voltage of the drive signal in accordance with effective power that is supplied to the liquid lens apparatus.
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公开(公告)号：US20180314042A1
公开(公告)日：2018-11-01
申请号：US15947144
申请日：2018-04-06
申请人： MITUTOYO CORPORATION
发明人： Shiro IGASAKI , Nobuo OHBA , Koji KUBO , Takahisa OOTAKE
摘要： A variable focal length lens device includes: a lens system whose refractive index changes depending on an inputted drive signal; an objective lens disposed in an optical axis common to the lens system; an image detector for detecting an image of a target object through the lens system and the objective lens; a resonance-lock controller for locking the frequency of the drive signal to a resonance frequency of the lens system; and a resonance-lock operation unit for switching enabling and suspending the resonance-lock controller.
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公开(公告)号：US20220229211A1
公开(公告)日：2022-07-21
申请号：US17569256
申请日：2022-01-05
申请人： MITUTOYO CORPORATION
发明人： Aimin SHA , Shiro IGASAKI
IPC分类号： G02B3/14
摘要： An image detection device includes an image detection optical system including a liquid resonant lens; an image detector configured to detect an image corresponding to a detection phase of a drive signal through the image detection optical system; a range determination unit configured to determine a first half or a second half of a cycle of the drive signal as a designated allowable range of the detection phase based on whether a phase delay shown by a variation waveform of a focus position is positive or negative; a detection phase setting unit configured to set the detection phase in the designated allowable range; and a detection control unit configured to control an image-detection timing by the image detector to a timing offset from the detection phase by an angle corresponding to the phase delay.
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公开(公告)号：US20180314041A1
公开(公告)日：2018-11-01
申请号：US15947088
申请日：2018-04-06
申请人： MITUTOYO CORPORATION
发明人： Shiro IGASAKI , Nobuo OHBA , Yuki KURAHASHI
摘要： A variable focal length lens device includes: a lens system whose refractive index changes in accordance with an inputted drive signal; and a resonance-lock controller that locks the drive signal to a resonance frequency of the lens system. The resonance-lock controller tunes a frequency of the drive signal to a peak position of a voltage-current phase difference between a voltage of the drive signal and a drive current of the lens system, and raises or lowers the frequency of the drive signal in accordance with the drive current when the voltage-current phase difference changes.
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公开(公告)号：US20210173129A1
公开(公告)日：2021-06-10
申请号：US17141507
申请日：2021-01-05
申请人： MITUTOYO CORPORATION
发明人： Shiro IGASAKI , Yuki KURAHASHI
摘要： 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.
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公开(公告)号：US20200208965A1
公开(公告)日：2020-07-02
申请号：US16717320
申请日：2019-12-17
申请人： MITUTOYO CORPORATION
发明人： 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
摘要： 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.
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公开(公告)号：US20180364019A1
公开(公告)日：2018-12-20
申请号：US16008160
申请日：2018-06-14
申请人： MITUTOYO CORPORATION
发明人： Masaoki YAMAGATA , Shiro IGASAKI
IPC分类号： G01B3/22
CPC分类号： G01B3/22 , G01B21/042
摘要： An indicator inspection machine inspects the accuracy of an indicator based on a value displayed by the indicator when a spindle changes position. The indicator inspection machine includes a measurement spindle provided so as to be freely raised and lowered in order to displace the spindle of the indicator; a contact point provided to a distalmost end of the measurement spindle, the contact point making contact with an indicator contact point provided to a distalmost end of the spindle of the indicator; a drive mechanism driving the measurement spindle; and a controller controlling the drive mechanism so as to bring the contact point into contact with the indicator contact point while changing a speed of the measurement spindle at a predetermined periodicity.
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