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公开(公告)号：US4792218A
公开(公告)日：1988-12-20
申请号：US139451
申请日：1987-12-30
摘要： A high definition projection lens for projecting on a screen an enlargement of an image appearing on a high resolution CRT is disclosed. The projection lens comprises a first lens having a positive optical power and a convex surface facing the screen, a meniscus second lens having a positive optical power, a third lens having bi-concave surfaces and a negative optical power, a fourth lens having a positive optical power, a fifth lens having bi-convex surfaces and a positive optical power, and a sixth lens having a negative power and an aspheric concave surface facing the fifth lens.
摘要翻译： 公开了一种用于在屏幕上投影出现在高分辨率CRT上的图像的放大的高分辨率投影透镜。 投影透镜包括具有正光焦度和面向屏幕的凸面的第一透镜，具有正光焦度的弯液面第二透镜，具有双凹面和负光焦度的第三透镜，具有正光焦度的第四透镜 光功率，具有双凸表面和正光焦度的第五透镜，以及具有负功率的第六透镜和面向第五透镜的非球面凹面。
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公开(公告)号：US4400722A
公开(公告)日：1983-08-23
申请号：US261136
申请日：1981-05-04
CPC分类号： H04N9/31
摘要： A projection television apparatus which has three monochromatic cathode-ray tubes, two type of dichroic mirrors, and a lens. Red, green and blue images from the three tubes are combined into the color image by the two types of dichroic mirrors and the resulting image is enlarged and projected on the screen by one lens. The two types of dichroic mirrors are crossed at a right angle in the shape of an "X". Each type of dichroic mirror is split in two through the line of intersection and the two parts of the respective dichroic mirrors of each type have different transmission characteristics, so that color shading is improved.
摘要翻译： 一种具有三个单色阴极射线管，两种分色镜和透镜的投影电视设备。 来自三个管的红色，绿色和蓝色图像通过两种分色镜组合成彩色图像，并且所得到的图像被放大并通过一个透镜投影在屏幕上。 两种分色镜以“X”的形状以直角交叉。 每种类型的分色镜通过交叉线分成两部分，每种分色镜的两部分具有不同的传输特性，从而提高了色调。
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公开(公告)号：US4199779A
公开(公告)日：1980-04-22
申请号：US949552
申请日：1978-10-04
CPC分类号： H04N9/8205 , H04N9/87
摘要： A VIR-signal processing circuitry for a VTR (video tape recorder) having a comb filter for obtaining a correct operation of the VIR circuit incorporated in a television receivers, comprises a comb filter stopping means for preventing the VITS (vertical interval test signal) on the 18th line from polluting the VIRS (vertical interval reference signal), a phase transfer means for transferring the phase information of the transmitted VIRS to the reference subcarrier after elimination of the crosstalks by integrating the VIRS, an amplitude transfer means for transferring the amplitude information of the transmitted VIRS to the output signal of said phase transfer means after elimination of the crosstalks by integrating the VIRS, and a VIRS replacing means for replacing the transmitted VIRS by the newly developed chrominance reference using the output signal of said amplitude transfer means.
摘要翻译： 一种用于VTR（录像机）的VIR信号处理电路，具有梳状滤波器，用于获得并入电视接收机中的VIR电路的正确操作，包括梳状滤波器停止装置，用于防止VITS（垂直间隔测试信号） 污染VIRS的第18行（垂直间隔参考信号），用于通过对VIRS进行积分来消除串扰之后将发送的VIRS的相位信息传送到参考子载波的相位传递装置，用于传送幅度信息的幅度传递装置 通过对VIRS进行积分而消除串扰后的所述相位传送装置的输出信号，以及VIRS替换装置，用于利用所述幅度传送装置的输出信号用新开发的色度参考来替换传输的VIRS。
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