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公开(公告)号：US11327387B2
公开(公告)日：2022-05-10
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：US10969661B2
公开(公告)日：2021-04-06
申请号：US16252170
申请日：2019-01-18
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：US20200034591A1
公开(公告)日：2020-01-30
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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