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    • 87. 发明授权
    • CRT color video printer which eliminates magnification changes due to
chromatic aberrations
    • CRT彩色视频打印机消除由于色差造成的放大倍数变化
    • US4924302A
    • 1990-05-08
    • US246114
    • 1988-09-19
    • Kazuo ShiotaKiichiro Sakamoto
    • Kazuo ShiotaKiichiro Sakamoto
    • H04N1/393H04N1/50
    • H04N1/508H04N1/393
    • An apparatus for making a color print has a black-and-white CRT for frame-sequentially displaying black-and-white images of three monochromatic images of an image in the form of a brightness pattern thereon, color filters for sequentially changing the black-and-white images to corresponding monochromatic images, a printing lens for projecting each monochromatic image onto a photographic material, and means for changing image size by color through which each monochromatic image is projected on the photographic material by the printing lens, so as to make the three monochromatic images projected onto the photographic material the same size. In the case of the printing lens having a fixed focal length, the image size changing means comprises an amplifier for amplifying vertical and horizontal deflection signals for driving the CRT and means for changing a gain of the amplifier for every exposure of each monochromatic image, so as to make the three monochromatic images projected onto the photographic material the same size. On the other hand, in the case of the printing lens being variable in focal length, the image size changing means comprises memory means for storing magnifications by color for several specific focal lengths of the zoom printing lens and means for adjusting the focal length of the zoom printing lens according to the magnifications stored in the memory means, so as to make the three monochromatic images projected onto the photographic material the same size.
    • 用于制作彩色打印的装置具有黑白CRT,用于以亮度图案形式的图像的三个单色图像的帧 - 顺序显示黑白图像,用于顺序地改变黑 - 白色图像到相应的单色图像,用于将每个单色图像投影到照相材料上的打印透镜,以及用于通过打印透镜将每个单色图像投射到照相材料上的颜色来改变图像尺寸的装置,以便使 投影到照相材料上的三个单色图像具有相同的尺寸。 在具有固定焦距的打印透镜的情况下,图像尺寸改变装置包括用于放大用于驱动CRT的垂直和水平偏转信号的放大器和用于每次单色图像的每次曝光改变放大器的增益的装置,因此 以使投影到照相材料上的三个单色图像具有相同的尺寸。 另一方面,在打印透镜的焦距变化的情况下,图像尺寸改变装置包括用于存储变焦打印透镜的几个特定焦距的颜色的放大率的存储装置和用于调整变焦打印透镜的焦距的装置 根据存储在存储装置中的放大倍率的变焦打印透镜,以使投影到照相材料上的三个单色图像具有相同的尺寸。