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公开(公告)号：US11782156B2
公开(公告)日：2023-10-10
申请号：US17892943
申请日：2022-08-22
Applicant: Cognex Corporation
Inventor： Andreas Weber , Laurens Nunnink , Rene Delasauce , William Equitz
IPC: G01S17/10 , G01S7/486 , G02B7/04 , G01S17/36 , G02B7/08 , G02B7/40 , G01S17/86 , H04N23/54 , H04N23/55 , H04N23/67
CPC classification number: G01S17/10 , G01S7/486 , G01S17/36 , G01S17/86 , G02B7/04 , G02B7/08 , G02B7/40 , H04N23/54 , H04N23/55 , H04N23/67 , H04N23/671
Abstract: This invention provides an integrated time-of-flight sensor that delivers distance information to a processor associated with the camera assembly and vison system. The distance is processed with the above-described feedback control, to auto-focus the camera assembly's variable lens during runtime operation based on the particular size/shape object(s) within the field of view. The shortest measured distance is used to set the focus distance of the lens. To correct for calibration or drift errors, a further image-based focus optimization can occur around the measured distance and/or based on the measured temperature. The distance information generated by the time-of-flight sensor can be employed to perform other functions. Other functions include self-triggering of image acquisition, object size dimensioning, detection and analysis of object defects and/or gap detection between objects in the field of view and software-controlled range detection to prevent unintentional reading of (e.g.) IDs on objects outside a defined range (presentation mode).
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公开(公告)号：US11681081B2
公开(公告)日：2023-06-20
申请号：US17475059
申请日：2021-09-14
Applicant: COGNEX CORPORATION
Inventor： Esther Oteo , Andreas Weber , Saul Sanz Rodriguez , Jens Ruetten , Pepe Fernandez-Dorado
CPC classification number: G02B3/14 , G02B7/008 , G02B7/028 , G02B7/08 , G02B26/004
Abstract: 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.
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公开(公告)号：US11422257B2
公开(公告)日：2022-08-23
申请号：US16859852
申请日：2020-04-27
Applicant: Cognex Corporation
Inventor： Andreas Weber , Laurens Nunnink , Rene Delasauce , William Equitz
IPC: G02B1/06 , G01S17/10 , H04N5/225 , G01S7/486 , G02B7/04 , H04N5/232 , G01S17/36 , G02B7/08 , G02B7/40 , G01S17/86
Abstract: This invention provides an integrated time-of-flight sensor that delivers distance information to a processor associated with the camera assembly and vison system. The distance is processed with the above-described feedback control, to auto-focus the camera assembly's variable lens during runtime operation based on the particular size/shape object(s) within the field of view. The shortest measured distance is used to set the focus distance of the lens. To correct for calibration or drift errors, a further image-based focus optimization can occur around the measured distance and/or based on the measured temperature. The distance information generated by the time-of-flight sensor can be employed to perform other functions. Other functions include self-triggering of image acquisition, object size dimensioning, detection and analysis of object defects and/or gap detection between objects in the field of view and software-controlled range detection to prevent unintentional reading of (e.g.) IDs on objects outside a defined range (presentation mode).
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公开(公告)号：US10679024B2
公开(公告)日：2020-06-09
申请号：US16043716
申请日：2018-07-24
Applicant: Cognex Corporation
Inventor： Ivan A. Bachelder , Chen Gao , Francisco Azcona Guerrero , Jose Fernandez Dorado , Esther Oteo Lozano , Andreas Weber
Abstract: This invention provides a system and method for detecting and acquiring one or more in-focus images of one or more barcodes within the field of view of an imaging device. A measurement process measures depth-of-field of barcode detection. A plurality of nominal coarse focus settings of a variable lens allow sampling, in steps, of a lens adjustment range corresponding to allowable distances between the one or more barcodes and the image sensor, so that a step size of the sampling is less than a fraction of the depth-of-field of barcode detection. An acquisition process acquires a nominal coarse focus image for each nominal coarse focus setting. A barcode detection process detects one or more barcode-like regions and respective likelihoods. A fine focus process fine-adjusts, for each high-likelihood barcode, the variable lens near a location of the barcode-like regions. The process acquires an image for decoding using the fine adjusted setting.
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公开(公告)号：US11875219B2
公开(公告)日：2024-01-16
申请号：US17567832
申请日：2022-01-03
Applicant: Cognex Corporation
Inventor： Ivan A. Bachelder , Chen Gao , Francisco Azcona Guerrero , Jose Fernandez Dorado , Esther Oteo Lozano , Andreas Weber
IPC: G06K7/14 , G06K7/10 , H04N23/959 , H04N23/67
CPC classification number: G06K7/1443 , G06K7/10722 , G06K7/1413 , H04N23/959 , H04N23/671
Abstract: This invention provides a system and method for detecting and acquiring one or more in-focus images of one or more barcodes within the field of view of an imaging device. A measurement process measures depth-of-field of barcode detection. A plurality of nominal coarse focus settings of a variable lens allow sampling, in steps, of a lens adjustment range corresponding to allowable distances between the one or more barcodes and the image sensor, so that a step size of the sampling is less than a fraction of the depth-of-field of barcode detection. An acquisition process acquires a nominal coarse focus image for each nominal coarse focus setting. A barcode detection process detects one or more barcode-like regions and respective likelihoods. A fine focus process fine-adjusts, for each high-likelihood barcode, the variable lens near a location of the barcode-like regions. The process acquires an image for decoding using the fine adjusted setting.
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Patent Agency Ranking
公开(公告)号：US20210397071A1
公开(公告)日：2021-12-23
申请号：US17222747
申请日：2021-04-05
Applicant: Cognex Corporation
Inventor： Laurens Nunnink , Francisco Javier Azcona Guerrero , Richard Reuter , Andreas Weber , Ben Carey
Abstract: An illumination system is provided for an optical system that includes an imaging device for acquiring an image of a target, for decoding of a symbol or other analysis. The illumination system can include a first light source configured to provide illumination of a first wavelength, a second light source configured to provide illumination of a second wavelength that is different from the first wavelength. The light sources can be controlled for operations that include: illuminating the target with the first and second light sources simultaneously for acquisition of the image of the target; and altering an illumination output of at least one of the first light source or the second light source, while maintaining non-zero illumination output for at least one of the first light source or the second light source, to indicate a status of the optical system.
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公开(公告)号：US11002854B2
公开(公告)日：2021-05-11
申请号：US15857733
申请日：2017-12-29
Applicant: Cognex Corporation
Inventor： Andreas Weber , Laurens Nunnink , Rene Delasauce , William Equitz
IPC: G02B1/06 , G01S17/10 , H04N5/225 , G01S7/486 , G02B7/04 , H04N5/232 , G01S17/36 , G02B7/08 , G02B7/40 , G01S17/86
Abstract: This invention provides an integrated time-of-flight sensor that delivers distance information to a processor associated with the camera assembly and vision system. The distance is processed with the above-described feedback control, to auto-focus the camera assembly's variable lens during runtime operation based on the particular size/shape object(s) within the field of view. The shortest measured distance is used to set the focus distance of the lens. To correct for calibration or drift errors, a further image-based focus optimization can occur around the measured distance and/or based on the measured temperature. The distance information generated by the time-of-flight sensor can be employed to perform other functions. Other functions include self-triggering of image acquisition, object size dimensioning, detection and analysis of object defects and/or gap detection between objects in the field of view and software-controlled range detection to prevent unintentional reading of (e.g.) IDs on objects outside a defined range (presentation mode).
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公开(公告)号：US20240248283A1
公开(公告)日：2024-07-25
申请号：US18417651
申请日：2024-01-19
Applicant: Cognex Corporation
Inventor： Esther Oteo Lozano , Torsten Kempf, III , Nicole Dippel , Francisco Azcona Guerrero , Andreas Weber , Laurens Nunnink
Abstract: A modular lens assembly for a machine vision system includes a lens housing, a liquid lens disposed within the lens housing, a solid lens element disposed within the lens housing, and a lens processor device disposed within the lens housing and coupled to the liquid lens. The lens processor device may be configured to determine a control signal to control the liquid lens.
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公开(公告)号：US20200319337A1
公开(公告)日：2020-10-08
申请号：US16859852
申请日：2020-04-27
Applicant: Cognex Corporation
Inventor： Andreas Weber , Laurens Nunnink , Rene Delasauce , William Equitz
IPC: G01S17/10 , H04N5/225 , G01S7/486 , G02B7/04 , H04N5/232 , G01S17/36 , G02B7/08 , G02B7/40 , G01S17/86
Abstract: This invention provides an integrated time-of-flight sensor that delivers distance information to a processor associated with the camera assembly and vison system. The distance is processed with the above-described feedback control, to auto-focus the camera assembly's variable lens during runtime operation based on the particular size/shape object(s) within the field of view. The shortest measured distance is used to set the focus distance of the lens. To correct for calibration or drift errors, a further image-based focus optimization can occur around the measured distance and/or based on the measured temperature. The distance information generated by the time-of-flight sensor can be employed to perform other functions. Other functions include self-triggering of image acquisition, object size dimensioning, detection and analysis of object defects and/or gap detection between objects in the field of view and software-controlled range detection to prevent unintentional reading of (e.g.) IDs on objects outside a defined range (presentation mode).
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公开(公告)号：US20190011557A1
公开(公告)日：2019-01-10
申请号：US15857733
申请日：2017-12-29
Applicant: Cognex Corporation
Inventor： Andreas Weber , Laurens Nunnink , Rene Delasauce , William Equitz
Abstract: This invention provides an integrated time-of-flight sensor that delivers distance information to a processor associated with the camera assembly and vision system. The distance is processed with the above-described feedback control, to auto-focus the camera assembly's variable lens during runtime operation based on the particular size/shape object(s) within the field of view. The shortest measured distance is used to set the focus distance of the lens. To correct for calibration or drift errors, a further image-based focus optimization can occur around the measured distance and/or based on the measured temperature. The distance information generated by the time-of-flight sensor can be employed to perform other functions. Other functions include self-triggering of image acquisition, object size dimensioning, detection and analysis of object defects and/or gap detection between objects in the field of view and software-controlled range detection to prevent unintentional reading of (e.g.) IDs on objects outside a defined range (presentation mode).
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