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目前实际使用的单管与两管彩色摄象机,彩色光学图象的分解,都采用频率或相位分离原理.本文研究在电视扫描作用下,光学上采用频谱间置,把光学载波频率选为半行频的奇数倍,使红、蓝基色光的已调波与绿基色在频谱上错开;在电路上应用相邻行彩色信息近似相等原理,采用梳状幅频特性与正交分离技术,使图象水平清晰度改善,高频信杂比提高6分贝.应用这种解调系统的单管摄象机,能满足工业、教育、医学、图象通信等方面的实际需要. 一、光学调制红、蓝基色的光学调制,由封装在摄象管靶面前的光学滤色条完成.它由黄、青条按图1方式组成.根据相加混色原理,黄色是红、绿混色而得,因此它能透过红、绿色光,反射蓝基色光;同理,绿、蓝相加混色得青色,因此青条透绿、蓝色1反射红色光.把黄、青条按一定顺序排列,周期性重复,在电视扫描作用下,用白
At present, the single-tube and two-tube color cameras actually used and the decomposition of color optical images all adopt the principle of frequency or phase separation.In this paper, under the action of the television scanning, the optical spectrum is interlaced optically, the optical carrier frequency is selected as Odd multiples of the half-line frequency make the modulated wave and the green primary color of the red and blue primary colors be spectrally misaligned. By applying the principle of equal approximation to the color information of adjacent rows in the circuit, by adopting the comb-shaped amplitude-frequency characteristic and the orthogonal separation technique, So that the image clarity of the level of improvement, high-frequency signal to noise ratio increased by 6 dB. The use of this demodulation system of single-tube camera, to meet the industrial, educational, medical, image communications, etc. The actual needs of optical modulation red , The optical modulation of the blue primary color is completed by the optical filter which is packaged in front of the target of the video tube and consists of yellow and green stripes as shown in Figure 1. According to the principle of additive color mixing, yellow is obtained by mixing red and green colors It can reflect the blue color light through the red and green light; similarly, the green and blue colors are cyan, so the green color is blue and the red light is reflected by the blue 1. The yellow and the blue are arranged in a certain order and the period Sexual repetition, in the role of television scanning, with white