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    • 5. 发明申请
    • DEVICE FOR IMAGING A FLAT OBJECT AND PRINTING MATERIAL PROCESSING MACHINE HAVING THE DEVICE
    • 用于成像平板物体的设备和具有设备的打印材料加工机
    • US20100245882A1
    • 2010-09-30
    • US12727505
    • 2010-03-19
    • Tobias MüllerAndreas Rupprecht
    • Tobias MüllerAndreas Rupprecht
    • H04N7/18G06K15/02
    • G06K9/209B41F33/0036G01N21/8901
    • A device for imaging a flat object, for example a paper sheet in a printing machine, includes a light source, preferably an LED row, a lens and an image sensor. An observation angle between the object plane and lens axis is flat, that is to say less than 45°. The light source illuminates the flat object in a first, near region with light of a first wavelength and illuminates the flat object in a second, far region with light of a second wavelength. The first wavelength is shorter than the second wavelength, preferably being blue and red spectral regions. The first region is disposed nearer the image sensor than the second region. The device permits the so-called chromatic aberration of the lens to be utilized to advantageously reduce the tilt angle of the image sensor required by the so-called Scheimpflug condition. A printing machine having the device is also provided.
    • 用于成像平面物体(例如印刷机中的纸张)的装置包括光源,优选地是LED排,透镜和图像传感器。 物平面和透镜轴之间的观察角度是平坦的,也就是说小于45°。 光源在具有第一波长的光的第一近区域中照亮平坦物体,并且在具有第二波长的光的第二远区域中照亮平坦物体。 第一波长比第二波长短,最好是蓝光和红光谱区。 第一区域比第二区域更靠近图像传感器。 该装置允许利用所谓的透镜色差来有利地降低由所谓的Scheimpflug条件所需的图像传感器的倾斜角度。 还提供了具有该装置的印刷机。
    • 7. 发明授权
    • Device for imaging a flat object and printing material processing machine having the device
    • 用于使平面物体成像的装置和具有该装置的打印材料处理机
    • US08514423B2
    • 2013-08-20
    • US12727505
    • 2010-03-19
    • Tobias MüllerAndreas Rupprecht
    • Tobias MüllerAndreas Rupprecht
    • H04N1/04H04N1/46H04N3/06H04N5/225H04N5/228H04N9/04
    • G06K9/209B41F33/0036G01N21/8901
    • A device for imaging a flat object, for example a paper sheet in a printing machine, includes a light source, preferably an LED row, a lens and an image sensor. An observation angle between the object plane and lens axis is flat, that is to say less than 45°. The light source illuminates the flat object in a first, near region with light of a first wavelength and illuminates the flat object in a second, far region with light of a second wavelength. The first wavelength is shorter than the second wavelength, preferably being blue and red spectral regions. The first region is disposed nearer the image sensor than the second region. The device permits the so-called chromatic aberration of the lens to be utilized to advantageously reduce the tilt angle of the image sensor required by the so-called Scheimpflug condition. A printing machine having the device is also provided.
    • 用于成像平面物体(例如印刷机中的纸张)的装置包括光源,优选地是LED排,透镜和图像传感器。 物平面和透镜轴之间的观察角度是平坦的,也就是说小于45°。 光源在具有第一波长的光的第一近区域中照亮平坦物体,并且在具有第二波长的光的第二远区域中照亮平坦物体。 第一波长比第二波长短,最好是蓝光和红光谱区。 第一区域比第二区域更靠近图像传感器。 该装置允许利用所谓的透镜色差来有利地降低由所谓的Scheimpflug条件所需的图像传感器的倾斜角度。 还提供了具有该装置的印刷机。