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30 条记录 (耗时 0.022 秒)

    On-axis aimer for vision system and multi-range illuminator for same
    21.
    发明授权
    On-axis aimer for vision system and multi-range illuminator for same 有权

    公开(公告)号：US10346645B1

    公开(公告)日：2019-07-09

    申请号：US13797820

    申请日：2013-03-12

    申请人： Cognex Corporation

    发明人： Laurens Nunnink ,  Saul Sanz Rodriguez

    IPC分类号： G06K19/00 ,  G06K7/015 ,  F21V13/04 ,  F21V5/04

    摘要： This invention provides an aimer assembly for a vision system that is coaxial (on-axis) with the camera optical axis, thus providing an aligned aim point at a wide range of working distances. The aimer includes a projecting light element located aside the camera optical axis. The beam and received light from the imaged (illuminated) scene are selectively reflected or transmitted through a dichoric mirror assembly in a manner that permits the beam to be aligned with the optical axis and projected to the scene while only light from the scene is received by the sensor. The aimer beam and illuminator employ differing light wavelengths. In a further embodiment, an internal illuminator includes a plurality of light sources below the camera optical axis. Some of the light sources are covered by a prismatic structure for close distance, and other light sources are collimated, projecting over a longer distance.

    SYSTEMS AND METHODS TO REDUCE TEMPERATURE INDUCED DRIFT EFFECTS ON A LIQUID LENS
    24.
    发明申请
    SYSTEMS AND METHODS TO REDUCE TEMPERATURE INDUCED DRIFT EFFECTS ON A LIQUID LENS 有权

    公开(公告)号：US20210405267A1

    公开(公告)日：2021-12-30

    申请号：US17475059

    申请日：2021-09-14

    申请人： COGNEX CORPORATION

    发明人： Esther Oteo ,  Andreas Weber ,  Saul Sanz Rodriguez ,  Jens Ruetten ,  Pepe Fernandez-Dorado

    IPC分类号： G02B3/14 ,  G02B7/00 ,  G02B7/08 ,  G02B7/02 ,  G02B26/00

    摘要： Systems and methods reduce temperature induced drift effects on a liquid lens used in a vision system. A feedback loop receives a temperature value from a temperature sensor, and based on the received temperature value, controls a power to the heating element based on a difference between the measured temperature of the liquid lens and a predetermined control temperature to maintain the temperature value within a predetermined control temperature range to reduce the effects of drift. A processor can also control a bias signal applied to the lens or a lens actuator to control temperature variations and the associated induced drift effects. An image sharpness can also be determined over a series of images, alone or in combination with controlling the temperature of the liquid lens, to adjust a focal distance of the lens.

    MACHINE VISION SYSTEM AND METHOD WITH STEERABLE MIRROR
    25.
    发明申请
    MACHINE VISION SYSTEM AND METHOD WITH STEERABLE MIRROR 有权

    公开(公告)号：US20210326603A1

    公开(公告)日：2021-10-21

    申请号：US17359200

    申请日：2021-06-25

    申请人： COGNEX CORPORATION

    发明人： Torsten Kempf ,  Saul Sanz Rodriguez ,  Pepe Fernandez-Dorado ,  Laurens Nunnink

    IPC分类号： G06K9/00 ,  G06K9/32 ,  G05D1/00 ,  G05D1/02 ,  G02B26/08

    摘要： A computer-implemented method for scanning a side of an object to identify a region of interest is provided. The method can include determining, using one or more computing devices, a distance between a side of an object and an imaging device, determining, using the one or more computing devices, a scanning pattern for an imaging device that includes a controllable mirror, based on the distance between the side of the object and the imaging device, moving a controllable mirror according to the scanning pattern to acquire, using the one or more computing device and the imaging device, a plurality of images of the side of the object, and identifying, using the one or more computing devices, the region of interest based on the plurality of images.

    CODE READER WITH EXTENDED READING RANGE
    27.
    发明申请
    CODE READER WITH EXTENDED READING RANGE 审中-公开

    公开(公告)号：US20200257867A1

    公开(公告)日：2020-08-13

    申请号：US16724634

    申请日：2019-12-23

    申请人： Cognex Corporation

    发明人： Pepe Fernandez-Dorado ,  Saul Sanz Rodriguez ,  Laurens Nunnink ,  Richard Reuter

    IPC分类号： G06K7/10 ,  G06K7/14 ,  G06K19/06

    摘要： An image based code reader comprises an image sensor. The image sensor is configured to acquire an image of a code. Additionally, the image based code reader includes a lens configured to project an image scene including the code onto the image sensor, the lens comprising a variable optical power that controls a focus distance of the image based code reader. The image based code reader further includes a processor operatively coupled to the image sensor and the lens. The processor is configured to acquire the image of the code using only pixels located within a region of interest of the sensor, and a size of the region of interest is selected based on the focus distance of the reader.

    Code reader with extended reading range
    28.
    发明授权
    Code reader with extended reading range 有权

    公开(公告)号：US10515246B2

    公开(公告)日：2019-12-24

    申请号：US15455406

    申请日：2017-03-10

    申请人： Cognex Corporation

    发明人： Pepe Fernandez-Dorado ,  Saul Sanz Rodriguez ,  Laurens Nunnink ,  Richard Reuter

    IPC分类号： G06K7/10 ,  G06K7/14 ,  G06K19/06

    摘要： An image based code reader comprises an image sensor. The image sensor is configured to acquire an image of a code. Additionally, the image based code reader includes a lens configured to project an image scene including the code onto the image sensor, the lens comprising a variable optical power that controls a focus distance of the image based code reader. The image based code reader further includes a processor operatively coupled to the image sensor and the lens. The processor is configured to acquire the image of the code using only pixels located within a region of interest of the sensor, and a size of the region of interest is selected based on the focus distance of the reader.