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公开(公告)号：US20250047960A1
公开(公告)日：2025-02-06
申请号：US18790356
申请日：2024-07-31
Applicant: MITUTOYO CORPORATION
Inventor： Yuko SHISHIDO , Koji KUBO , Tatsuya NAGAHAMA
Abstract: A variable focal length lens device includes: a variable focal length optical system configured to change a focal length; a beam splitter configured to cause passing light, which is reflected off an object and passes through the variable focal length optical system, to branch into branched beams; an image-forming lens configured to condense the branched beams respectively; an image sensor configured to capture an image of the object by receiving the branched beam condensed by the image-forming lens; and an image sensor configured to capture an image of the object by receiving the branched beam condensed by the image-forming lens. An imaging distance on a first optical axis from the image sensor to the image-forming lens and an imaging distance on a second optical axis from the image sensor to the image-forming lens are different from each other.
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公开(公告)号：US20150346475A1
公开(公告)日：2015-12-03
申请号：US14718349
申请日：2015-05-21
Applicant: MITUTOYO CORPORATION
Inventor： Eisuke MORIUCHI , Tatsuya NAGAHAMA , Yuko SHISHIDO
CPC classification number: G02B21/244 , G02B7/34 , G02B7/38 , G02B21/245
Abstract: A focus detection unit to adjust a focal point of an image, of an object, formed by an optical system includes a first output section, a second output section, and a projection optical system. The first output section includes a first light modulation element configured to generate a first pattern image based on incident light and is configured to output the generated first pattern image. The second output section includes a second light modulation element configured to generate a second pattern image based on incident light and is configured to output the generated second pattern image. The projection optical system is configured to project the output first pattern image and the output second pattern image such that the output first pattern image and the output second pattern image have a predetermined positional relationship at an in-focus position of the optical system.
Abstract translation: 调整由光学系统形成的物体的焦点的焦点检测单元包括第一输出部分，第二输出部分和投影光学系统。 第一输出部包括：第一光调制元件，被配置为基于入射光生成第一图案图像，并且被配置为输出所生成的第一图案图像。 第二输出部分包括第二光调制元件，其被配置为基于入射光产生第二图案图像，并且被配置为输出所生成的第二图案图像。 投影光学系统被配置为投影输出第一图案图像和输出第二图案图像，使得输出第一图案图像和输出第二图案图像在光学系统的对焦位置处具有预定的位置关系。
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公开(公告)号：US20130242311A1
公开(公告)日：2013-09-19
申请号：US13782084
申请日：2013-03-01
Applicant: MITUTOYO CORPORATION
Inventor： Atsushi USAMI , Tatsuya NAGAHAMA
IPC: G01B9/02
CPC classification number: G01B9/02075 , G01B9/02007 , G01B9/02058 , G01B9/0209 , G01B9/04 , G01B2290/70
Abstract: A white-light interferometric measuring device includes: a white light source that emits a white light beam; a beam splitter that reflects the white light beam; and an interference objective lens that collects the white light beam having reflected off the beam splitter in the direction of an optical axis and irradiates a measurement workpiece with the white light beam, the interference objective lens generating interference between a measurement light beam obtained by reflection of the white light beam off the measurement workpiece and a reference light beam obtained by branching of the white light beam to be converged on the measurement workpiece. Polarization correcting means that corrects the white light beam to enter the interference objective lens to circularly polarized light is arranged between the white light source and the interference objective lens.
Abstract translation: 白光干涉测量装置包括：发射白光束的白光源; 反射白光束的分束器; 以及干涉物镜，其收集沿光轴方向反射的分束器的白光束，并将白色光束照射测量工件，干涉物镜产生通过反射获得的测量光束之间的干涉 白光束离开测量工件，通过白光束的分支获得的参考光束被聚焦在测量工件上。 在白光源和干涉物镜之间配置有将白光进入干涉物镜的圆偏振光进行偏振校正的装置。
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Patent Agency Ranking
公开(公告)号：US20190121056A1
公开(公告)日：2019-04-25
申请号：US16161835
申请日：2018-10-16
Applicant: MITUTOYO CORPORATION
Inventor： Tatsuya NAGAHAMA , Koji KUBO , Yuko SHISHIDO , Masaki OKAYASU , Atsushi USAMI
Abstract: A variable focal length lens apparatus includes an objective lens and an imaging lens that are aligned on the same optical axis; a front side lens system and a rear side lens system that are disposed in a section between the objective lens and the imaging lens on the optical axis, and change a refractive index in accordance with an input drive signal; and a diaphragm disposed in the section between the front side lens system and the rear side lens system on the optical axis.
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公开(公告)号：US20180180774A1
公开(公告)日：2018-06-28
申请号：US15854251
申请日：2017-12-26
Applicant: MITUTOYO CORPORATION
Inventor： Tatsuya NAGAHAMA , Yuko SHISHIDO , Yuki KURAHASHI
Abstract: A variable focal length lens apparatus includes a lens system where a refractive index changes in response to an input drive signal; a field lens arranged on the same optical axis as the lens system; an image detector detecting an image of a measured object through the lens system and the field lens; a pulse illuminator providing pulse illumination of the measured object based on an input light emission signal; a temperature sensor detecting temperature information for an interior of the lens system; and a controller outputting the drive signal and the light emission signal in addition to correcting the timing of the light emission signal based on the temperature information.
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公开(公告)号：US20140145084A1
公开(公告)日：2014-05-29
申请号：US14167562
申请日：2014-01-29
Applicant: MITUTOYO CORPORATION
Inventor： Kenji OKABE , Tatsuya NAGAHAMA , Nobuya KANEKO
CPC classification number: G01N21/64 , G01N21/25 , G02B21/248
Abstract: In an optical measuring device, the visual observation section includes: a white light source which emits white light; a first objective lens arranged between the white light source and measurement object, through which the white light emitted from the white light source and return light from the measurement object transmit; a plurality of tube lenses which change a magnification of the return light passing through the first objective lens to a predetermined magnification; and a lens switching mechanism which can selectively switch the tube lenses so as to select one of the tube lenses to be arranged on the return light, and the special observation section includes: a special light source which emits special light; and a second objective lens arranged between the special light source and measurement object, through which the special light emitted from the special light source and return light from the measurement object transmit.
Abstract translation: 在光学测量装置中，目视观察部包括：发出白光的白色光源; 布置在白光源和测量对象之间的第一物镜，通过该第一物镜从白光源发射并返回来自测量对象的光的白光发射; 多个管透镜，其将通过第一物镜的返回光的放大率改变到预定的倍率; 以及透镜切换机构，其可以选择性地切换管透镜以选择要布置在返回光上的管透镜中的一个，并且特殊观察部分包括：发射特殊光的特殊光源; 以及布置在特殊光源和测量对象之间的第二物镜，通过该第二物镜从特殊光源发射并从测量对象返回光的特殊光发射。
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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
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
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.
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公开(公告)号：US20170285318A1
公开(公告)日：2017-10-05
申请号：US15455934
申请日：2017-03-10
Applicant: MITUTOYO CORPORATION
Inventor： Gyokubu CHO , Tatsuya NAGAHAMA , Takahisa OOTAKE , Kazuki KITAGAWA
CPC classification number: G02B21/245 , G02B21/025 , G02B21/361 , G02B21/365
Abstract: An imaging system includes: an image forming device that obtains image information of an object with the focal length to the object being changed by a variable focal length lens in an optical system, so as to form an all-focused image of the object; a sensor device that detects variations in the surface level of the object in a focus direction; and a position adjustment device that adjusts the position of the object in the focus direction in accordance with the surface level variations of the object detected by the sensor device. The position adjustment device adjusts the position of the object in the focus direction in such a manner that the surface level of the object becomes closer to the center of a variable focal length range of the variable focal length lens.
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