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    • 2. 发明申请
    • Fundamental wave beat component detecting method and measuring target signal sampling apparatus and waveform observation system using the same
    • 基波分量检测方法和测量目标信号采样装置及使用其的波形观测系统
    • US20100299092A1
    • 2010-11-25
    • US12308263
    • 2008-04-04
    • Yukio Tsuda
    • Yukio Tsuda
    • G01R23/14
    • G01R23/20G01R13/0272G01R19/2509G01R23/14
    • A fundamental wave beat component frequency detecting method includes steps of obtaining the frequency fb[i] of plural peak signals which appear in a band ½ of a frequency fs from a spectrum obtained from measuring target signals sampled with the sampling frequency fs in order to detect the repetition frequency (fundamental wave component) of the measuring target signal having plural harmonic components having a similar power, assuming that each of the plural peak signals is a beat component (fundamental wave beat component) originating from the fundamental wave of the measuring target signal before and after the sampling frequency is changed so as to successively calculate each theoretical frequency fc[i,j] of the beat component (harmonic beat component) originating from the harmonic component of the measuring target signal, successively comparing the each theoretical frequency fc[i,j] with the frequency fb[i] of the plural peak signals, and determining that the peak signal which gives the theoretical frequency fc[k,j] which mostly agrees with the frequency fb[i] of the plural peak signals is a fundamental wave beat component originating from the fundamental wave of the measuring target signal.
    • 基波分量频率检测方法包括以下步骤:从从以采样频率fs采样的目标信号的测量获得的频谱中获得出现在频率fs的1/2频带中的多个峰值信号的频率fb [i],以便检测 假设多个峰值信号中的每一个是源自测量目标信号的基波的拍子分量(基波波分量),具有具有相似功率的多个谐波分量的测量目标信号的重复频率(基波分量) 在采样频率改变之前和之后,连续地计算源自测量目标信号的谐波分量的拍子分量(谐波拍子分量)的理论频率fc [i,j],连续地比较每个理论频率fc [ i,j]与多个峰值信号的频率fb [i]相关联,并确定峰值信号giv 与多个峰值信号的频率fb [i]大致一致的理论频率fc [k,j]是源自测量目标信号的基波的基波电波分量。
    • 3. 发明授权
    • Optical amplifier evaluation method and optical amplifier evaluation device
    • 光放大器评估方法及光放大器评估装置
    • US06236452B1
    • 2001-05-22
    • US09214686
    • 1999-01-08
    • Hiroshi GotoYukio TsudaYouji Sonobe
    • Hiroshi GotoYukio TsudaYouji Sonobe
    • G01N2100
    • H04B10/0731G01M11/30H04B10/07H04B10/077H04B10/07955
    • This invention is applied to an optical amplifier evaluation method of modulating by an optical modulator 23 light output from a light source 1 into a rectangular optical signal which is enabled/disabled in a predetermined period, then applying the optical signal to an optical fiber amplifier 2 to be measured, and obtaining the gain and noise figure of the optical fiber amplifier from the light intensities in the ON and OFF periods of an optical signal output from the optical fiber amplifier and the light intensity in the ON period of an optical signal input to the optical fiber amplifier. Output light from the optical fiber amplifier in a no-input state is passed through an optical path extending from the light source to the optical fiber amplifier and an optical path extending from the optical fiber amplifier to a light intensity measurement position, thereby obtaining optical losses on the respective optical paths. By the obtained optical losses, the light intensities are corrected. As a result, the gain G and noise figure NF of the optical fiber amplifier 2 can be attained with high precision.
    • 本发明应用于通过光调制器23将从光源1输出的光调制成在预定周期内被允许/禁止的矩形光信号的光放大器评估方法,然后将光信号施加到光纤放大器2 并且从光纤放大器输出的光信号的导通和截止周期的光强度和光信号输入的导通期间的光强度的光强度获得光纤放大器的增益和噪声系数, 光纤放大器。 来自光纤放大器的无输入状态的输出光通过从光源延伸到光纤放大器的光路以及从光纤放大器延伸到光强测量位置的光路,从而获得光损耗 在各个光路上。 通过获得的光损耗,校正光强度。 结果,可以高精度地获得光纤放大器2的增益G和噪声系数NF。
    • 4. 发明授权
    • Optical amplifier evaluating method and optical amplifier evaluating apparatus
    • 光放大器评估方法和光放大器评估装置
    • US06212003B1
    • 2001-04-03
    • US09403051
    • 1999-10-12
    • Hiroshi KomazawaYukio Tsuda
    • Hiroshi KomazawaYukio Tsuda
    • H01S300
    • G01M11/333G01M11/335
    • In an optical amplifier evaluating system of this invention, a pulse method using optical modulators and a probe method are combined to obtain a gain G and noise figure NF of an optical fiber amplifier. A first optical modulator turns on and off signal light output from a first light source. An optical multiplexer multiplexes the optical signal turned on and off by the first optical modulator and probe light output from a second light source. This optical signal multiplexed by the optical multiplexer is selectively fed into an optical fiber amplifier. A controller properly switches optical path switches to allow an optical spectrum analyzer to measure (1) the light intensity of an input signal of the probe light to the optical fiber amplifier, (2) the light intensity in a region where signal light extracted from the output signal light from the optical fiber amplifier by a second optical modulator is in an OFF period and the probe light is output, and (3) the light intensity in a region where the signal light extracted by the second optical modulator is in the OFF period and no probe light is output. On the basis of measured light intensities (1), (2), and (3), the controller calculates the gain G and noise figure NF of the optical fiber amplifier. In this manner, the optical amplifier evaluating system of this invention can accurately obtain the gain G and noise figure NF of the optical fiber amplifier.
    • 在本发明的光放大器评估系统中,组合使用光调制器的脉冲方法和探针方法,以获得光纤放大器的增益G和噪声系数NF。 第一光调制器打开和关闭从第一光源输出的信号光。 光复用器多路复用由第一光调制器导通和关断的光信号和从第二光源输出的探测光。 由光复用器复用的该光信号被选择性地馈送到光纤放大器中。 控制器正确地切换光路开关,允许光谱分析仪测量(1)光纤放大器的探测光输入信号的光强度,(2)从 通过第二光调制器的来自光纤放大器的输出信号光处于OFF周期并且探测光被输出,并且(3)由第二光调制器提取的信号光的区域中的光强度处于OFF周期 并且不会输出探测光。 基于测量光强度(1),(2)和(3),控制器计算光纤放大器的增益G和噪声系数NF。 以这种方式,本发明的光放大器评估系统可以准确地获得光纤放大器的增益G和噪声系数NF。
    • 6. 发明授权
    • Electrophotographic recording device
    • 电子照相记录装置
    • US5384591A
    • 1995-01-24
    • US907568
    • 1992-07-02
    • Yukio Tsuda
    • Yukio Tsuda
    • B41J2/51B41J2/44B41J2/45B41J2/455G03G15/04G06K15/12H04N1/036H04N1/19G01D15/06G01D15/14
    • G06K15/1247
    • An electrophotographic recording device comprises a photoconductive drum which is rotated at a constant speed, a charger for charging a photoconductive surface of the photoconductive drum, a recording head which includes a large number of light emitting diodes arranged in a line, and which exposes the charged photoconductive surface, in order to form an electrostatic image corresponding to image data on the photoconductive surface, a developing unit for developing the electrostatic image into a toner image, a transfer unit for transferring the toner image onto a paper sheet, a fixing unit for fixing the toner image transferred onto the paper sheet, a line density decision circuit for deciding the line density of an image from the image data, and an emission time setting circuit for determining an emission time of the light emitting diodes in accordance with the line density detected by the decision circuit, the emission time setting circuit determining a first emission time in relation to image data to be printed with a first line density, and determining a second emission time shorter than the first emission time in relation to image data to be printed with a second line density higher than the first line density.
    • 一种电子照相记录装置,包括以恒定速度旋转的感光鼓,用于对感光鼓的光电导表面充电的充电器,包括排列成一行的大量发光二极管的记录头, 光电导表面,以形成对应于光电导表面上的图像数据的静电图像,用于将静电图像显影成调色剂图像的显影单元,用于将调色剂图像转印到纸张上的转印单元,用于固定的定影单元 转印到纸张上的调色剂图像,用于根据图像数据确定图像的线密度的线密度判定电路和用于根据检测到的线密度来确定发光二极管的发光时间的发光时间设定电路 通过判定电路,发射时间设定电路确定关于第一发射时间 以第一线密度对要打印的数据进行成像,并且确定相对于要以高于第一线密度的第二线密度打印的图像数据的第一发射时间短的第二发射时间。
    • 9. 发明授权
    • Binarizing system of picture image signals
    • 图像信号二值化系统
    • US4731862A
    • 1988-03-15
    • US709662
    • 1985-03-08
    • Yukio TsudaFumio Owada
    • Yukio TsudaFumio Owada
    • G06K9/38H04N1/403
    • G06K9/38H04N1/403
    • A system preprocesses analog picture image signals formed by scanning a manuscript prior to binarization into signals representing black or white according to a predetermined threshold value, compares a digital signal of a picture element to be corrected and of a signal of a picture element at least one main scanning line before the picture element to be corrected and positioned at the same position as the picture element to be corrected in an auxiliary scanning direction which is attenuated with each main scanning line or lines are compared. The one of these two signals having a larger level at a given time is used as a reference signal showing the nature of tone of the manuscript. When the level of digital picture image signal of the picture element to be corrected is closer to a black or white than the level of the reference signal, the level of the digital picture image signal is adjusted towards black or white. In other cases, the level of the digital picture image signals is maintained. By this operation, the nature of tone of the manuscript is emphasized and the accuracy of judgement in later binarizing the analog picture image signals is improved.
    • 系统预处理通过根据预定阈值将二值化之前的原稿扫描成代表黑色或白色的信号而形成的模拟图像图像信号,将要校正的像素的数字信号和图像元素的信号至少一个 在要被校正的像素之前的主扫描线和与要被校正的像素在与每个主扫描线或线被衰减的辅助扫描方向上相同的位置被比较。 将在给定时间具有较大电平的这两个信号中的一个信号用作表示原稿色调性质的参考信号。 当要校正的像素的数字图像信号的电平比参考信号的电平更接近于黑色或白色时,数字图像信号的电平被调整为黑色或白色。 在其他情况下,维持数字图像信号的电平。 通过这种操作,强调了原稿的色调特性,并提高了后来对模拟图像信号进行二值化的判断精度。
    • 10. 发明授权
    • Binarizing system of picture image signals
    • 图像信号二值化系统
    • US4667249A
    • 1987-05-19
    • US709729
    • 1985-03-08
    • Fumio OwadaYukio Tsuda
    • Fumio OwadaYukio Tsuda
    • G06K9/38H04N1/403H04N1/40
    • G06K9/38H04N1/403
    • In a binarizing system wherein analog picture image signals produced by scanning a manuscript picture image is quantized and the quantized signals are converted into digital picture image signals which are binarized into signals representing black or white according to a predetermined threshold value, some picture image signals of picture elements on the same main scanning line as a picture element to be corrected and positioned before the picture element to be corrected among the digital picture image signals are selectively extracted, and at least one of the picture image signals whose level becomes a maximum or a minimum is further selected from the extracted picture image signals. The picture image signal thus selected is used as a reference signal showing the nature of tone of the manuscript picture image for subjecting the picture image signal of the picture image to be corrected to a calculation emphasizing the nature of tone of the picture image to be corrected in the manuscript picture image.
    • 在通过扫描原稿图像图像而产生的模拟图像信号被量化并且量化的信号被转换成根据预定阈值被二值化为表示黑色或白色的信号的数字图像信号的二值化系统中,一些图像信号 选择性地提取与要校正和定位在要被校正的像素之间的像素的相同主扫描线上的像素在数字图像信号中的等级变为最大的图像信号或 从所提取的图像信号中进一步选择最小值。 这样选择的图像信号用作参考信号,表示用于对图像的图像图像信号进行校正的原稿图像图像的色调的特性,以强调要校正的图像的色调的性质的计算 在手稿图片图片。