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    • 102. 发明授权
    • Sampling frequency conversion apparatus
    • 采样变频装置
    • US5159338A
    • 1992-10-27
    • US800247
    • 1991-11-29
    • Yasuo Takahashi
    • Yasuo Takahashi
    • H04B14/04H03H17/06H04B1/69H04J13/00
    • H03H17/0628H03H17/0657
    • A sampling frequency conversion apparatus according to this invention converts an input data string based on an input sampling pulse into a data string based on an output sampling pulse having a frequency different from the frequency of the input sampling pulse. The apparatus reproduces the input sampling pulse based on the input data string, generates interpolation sampling pulses having a frequency corresponding to an integral multiple of the frequency of the input sampling pulse, and generates an interpolated data string from the input data string on the basis of the interpolation sampling pulses. On the other hand, the apparatus phase-modulates the output sampling pulse to diffuse its frequency spectrum, and selects and determines a timing of the interpolation sampling pulse closest to the timing of the phase-modulated output sampling pulse. The apparatus selects data corresponding to the selected timing from the interpolated data string, and outputs the selected data.
    • 根据本发明的采样频率转换装置,基于输入采样脉冲,基于输入采样脉冲的频率不同的输出采样脉冲将输入数据串转换成数据串。 该装置基于输入数据串再现输入采样脉冲,产生具有与输入采样脉冲的频率的整数倍相对应的频率的内插采样脉冲,并基于输入采样脉冲从输入数据串生成内插数据串 内插采样脉冲。 另一方面,设备对输出采样脉冲进行相位调制以扩展其频谱,并选择并确定最接近相位调制输出采样脉冲定时的插值采样脉冲的定时。 该装置从内插数据串中选择与选定定时对应的数据,并输出所选择的数据。
    • 105. 发明授权
    • Miniaturized semi-wide-angle photographic lens
    • 小型半广角摄影镜头
    • US4154509A
    • 1979-05-15
    • US831207
    • 1977-09-07
    • Yasuo Takahashi
    • Yasuo Takahashi
    • G02B9/34G02B13/04
    • G02B9/34
    • A miniaturized semi-wide-angle photographic lens having a field of view angle of from .+-.27.degree. to .+-.28.degree. is composed of five lenses grouped in four lens components. In order from the object side to the image side, the first lens is a positive lens having its surface of greater curvature toward the object, and the second lens is a double concave lens. The third lens and the fourth lens are respectively a negative lens and a positive lens, both of which constitute a cemented doublet lens. The fifth lens is a positive meniscus lens having its surface of greater curvature toward the image.
    • 具有+/- 27°至+/- 28°的视野角的小型半广角摄影镜头由分为四个透镜组件的五个透镜组成。 从物体侧到像侧,第一透镜是具有朝向物体的曲率大的表面的正透镜,第二透镜是双凹透镜。 第三透镜和第四透镜分别是负透镜和正透镜,它们都构成胶合双透镜。 第五透镜是具有朝向图像的曲率更大的表面的正弯月形透镜。