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    • 6. 发明授权
    • Colored image reading apparatus
    • 彩色图像读取装置
    • US4517589A
    • 1985-05-14
    • US433223
    • 1982-10-07
    • Takeshi BabaKazuhiko Matsuoka
    • Takeshi BabaKazuhiko Matsuoka
    • H04N1/48H04N1/46
    • H04N1/488
    • A colored image reading apparatus has a light source for illuminating the surface of an original, a transmitting optical system for dividing the light beam from the surface of the original into two beams of short wavelength zone and long wavelength zone and transmitting them to a light detector, a processing circuit for effecting an operation between the signals from the light detector and obtaining a plurality of electrical signals, and a converter circuit for converting the plurality of electrical signals into signals corresponding to respective colors, and is capable of well discriminating and reading four colors, black, blue, red and white, by selecting to predetermined values the wavelength .lambda.'b of the overall spectral characteristic on the short wavelength zone side including all of the spectral characteristics of the light source, the transmitting optical system and the light detector relative to the maximum value of the transmission factor and the wavelength .lambda.'r of the overall spectral characteristic on the long wavelength zone side relative to the maximum value of the transmission factor.
    • 彩色图像读取装置具有用于照射原稿的表面的光源,用于将来自原稿的表面的光束分成两束短波长区域和长波长区域的发送光学系统,并将其发送到光检测器 ,用于进行来自光检测器的信号之间的操作并获得多个电信号的处理电路,以及用于将多个电信号转换成对应于各种颜色的信号的转换器电路,并且能够良好地识别和读取四个 颜色,黑色,蓝色,红色和白色,通过选择包括光源,发射光学系统和光检测器的所有光谱特性的短波长区侧的总光谱特性的波长λ'b的预定值 相对于透射因子的最大值和t的波长λ'r 他在长波段一侧的总光谱特性相对于传输系数的最大值。