SYSTEM AND METHOD FOR OPTICALLY IMAGING OBJECTS ON A DETECTION DEVICE BY MEANS OF A PINHOLE APERTURE
    11.
    发明公开
    SYSTEM AND METHOD FOR OPTICALLY IMAGING OBJECTS ON A DETECTION DEVICE BY MEANS OF A PINHOLE APERTURE 有权
    系统和方法的对象该检测元件的光学例证一个洞面板进行

    公开(公告)号:EP1851680A2

    公开(公告)日:2007-11-07

    申请号:EP06701300.3

    申请日:2006-01-19

    IPC分类号: G06K9/20

    CPC分类号: G06K9/2036

    摘要: The invention describes systems and methods for optically imaging objects and in particular optical patterns or codes onto a detection device by means of a pinhole aperture. According to the invention these systems have optical attenuation elements between the illumination devices and the object which substantially compensate the system-inherent imaging defects caused by the pinhole aperture and in particular the system-inherent peripheral decrease in brightness of an image of the object formed by a pinhole aperture on the detection device. According to the invention the optical attenuation elements change the illumination intensity of the object in such a manner that the central areas of the object are illuminated at a lower light intensity than its peripheral areas. As a result of the subsequent imaging of the object by means of a pinhole aperture, the central areas of the object are imaged onto the detection device at a higher light intensity than the peripheral areas of the object. The superimposition of the two effects enables the imaging system according to the invention to achieve a substantially uniform system-inherent brightness distribution on the detection device.

    SYSTEM AND METHOD FOR OPTICALLY IMAGING OBJECTS ON A DETECTION DEVICE BY MEANS OF A PINHOLE APERTURE
    16.
    发明授权
    SYSTEM AND METHOD FOR OPTICALLY IMAGING OBJECTS ON A DETECTION DEVICE BY MEANS OF A PINHOLE APERTURE 有权
    系统和方法的对象该检测元件的光学例证一个洞面板进行

    公开(公告)号:EP1851680B1

    公开(公告)日:2010-12-15

    申请号:EP06701300.3

    申请日:2006-01-19

    IPC分类号: G06K9/20

    CPC分类号: G06K9/2036

    摘要: The invention describes systems and methods for optically imaging objects and in particular optical patterns or codes onto a detection device by means of a pinhole aperture. According to the invention these systems have optical attenuation elements between the illumination devices and the object which substantially compensate the system-inherent imaging defects caused by the pinhole aperture and in particular the system-inherent peripheral decrease in brightness of an image of the object formed by a pinhole aperture on the detection device. According to the invention the optical attenuation elements change the illumination intensity of the object in such a manner that the central areas of the object are illuminated at a lower light intensity than its peripheral areas. As a result of the subsequent imaging of the object by means of a pinhole aperture, the central areas of the object are imaged onto the detection device at a higher light intensity than the peripheral areas of the object. The superimposition of the two effects enables the imaging system according to the invention to achieve a substantially uniform system-inherent brightness distribution on the detection device.