公开(公告)号：US5239322A

公开(公告)日：1993-08-24

申请号：US700471

申请日：1991-05-15

申请人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Ichiro Negishi ,  Tetsuji Suzuki ,  Fujiko Tatsumi ,  Ryusaku Takahashi ,  Keiichi Maeno

发明人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Ichiro Negishi ,  Tetsuji Suzuki ,  Fujiko Tatsumi ,  Ryusaku Takahashi ,  Keiichi Maeno

IPC分类号： G02F1/03 ,  G02F1/13 ,  G02F1/135 ,  G03B21/00 ,  G09F9/00 ,  H04N9/31

CPC分类号： H04N9/3167

摘要： There is provided an apparatus for displaying an image on a screen by projecting a reading light from a light source onto a spatial light modulator of reflective type in which the image is written, and projecting a reflected light from the modulator corresponding to the image onto the screen through a projection lens, the modulator, lens and screen being provided so that their optical axes are in agreement on one optical path. The apparatus comprises an optical device provided between the lens and screen for the reading light toward the modulator and passing the reflected light to the screen and a converging element for converging the reading light on the position which is on the optical axis of the lens and located between the lens and screen so that the reading light thus turned becomes a parallel pencil beam which is projected onto the modulator in parallel with the optical axis.

摘要翻译： 提供了一种用于通过将来自光源的读取光投射到其上写入图像的反射型空间光调制器并将来自与图像相对应的调制器的反射光投影到屏幕上的图像的装置， 通过投影透镜屏幕，调制器，透镜和屏幕被设置成使得它们的光轴在一个光路上一致。 该装置包括设置在透镜和屏幕之间的光学装置，用于朝向调制器读取光并将反射光传递到屏幕;以及会聚元件，用于将读取光聚焦在位于透镜的光轴上的位置上 在透镜和屏幕之间，使得这样转动的读取光成为平行的笔形光束，其平行于光轴投影到调制器上。

公开(公告)号：US5227902A

公开(公告)日：1993-07-13

申请号：US700475

申请日：1991-05-15

申请人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Ichiro Negishi ,  Tetsuji Suzuki ,  Fujiko Tatsumi ,  Ryusaku Takahashi ,  Keiichi Maeno

发明人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Ichiro Negishi ,  Tetsuji Suzuki ,  Fujiko Tatsumi ,  Ryusaku Takahashi ,  Keiichi Maeno

IPC分类号： G02F1/03 ,  G02F1/13 ,  G02F1/135 ,  G02F3/00

CPC分类号： G02F1/1354 ,  G02F3/00

摘要： A spatial light modulator which includes a light modulation layer which is interposed between two photoconductive layers and laminated to both layers; the two photo conductive layers have charge images written thereon, respectively, by illumination of a writing light carrying optical information; the illumination direction of the writing light to the photoconductive layers are different from each other; and the two photoconductive layers permit the reading light to pass therethrough. When illuminated by a reading light via either of the first or second photoconductive layers, the light modulation layer optically modulates the reading light in accordance with the first and second charge images, under the presence of a voltage applied to the modulator. Thus it reads read out the first information and second information. The first and second photoconductive layers permit the reading light to pass therethrough.

摘要翻译： 一种空间光调制器，其包括介于两个光电导层之间并层压到两层的光调制层; 两个光导体层分别通过照射携带光学信息的写入光而写入其上的电荷图像; 写入光到光电导层的照明方向彼此不同; 并且两个光电导层允许读取光通过。 当通过第一或第二光导层中的任一个被读取光照射时，光调制层在施加到调制器的电压的存在下，根据第一和第二充电图像对读取光进行光学调制。 因此，它读取读出第一信息和第二信息。 第一和第二光电导层允许读取光通过。

公开(公告)号：US5122895A

公开(公告)日：1992-06-16

申请号：US623236

申请日：1990-12-04

申请人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Ichiro Negishi ,  Tetsuji Suzuki ,  Fujiko Tatsumi ,  Ryusaku Takahashi ,  Keiichi Maeno

发明人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Ichiro Negishi ,  Tetsuji Suzuki ,  Fujiko Tatsumi ,  Ryusaku Takahashi ,  Keiichi Maeno

IPC分类号： G02B5/04 ,  G02B27/08 ,  G02B27/28

CPC分类号： G02B27/283

摘要： An efficiency polarization converter of few optical components for converting a randomly polarized light into a single beam of linearly polarized light, comprises a first optical device receiving the random light and projecting two linearly polarized lights one projected in a first direction, another to a second optical device which changes the polarization plane thereof, the polarization changes light being directed by a third optical device to the first direction, thereby the two linearly polarized light are combined and aligned to have a common polarization to become the single beam linearly polarized light projected in the first direction. Typical first optical device is a polarization beam splitter, a typical second optical device is a quarterwave plate with a mirror, a halfwave plate or a Fresnel rhomb with a mirror, or a photomodulation material interposed between biased electrodes with a mirror, a typical third optical device is a polarization beam splitter, a prism or a mirror. The first and third optical devices may be combined to a 3-prism structure. The polarization converter may be used with liquid crystal light modulators to utilize image display systems.

公开(公告)号：US4578699A

公开(公告)日：1986-03-25

申请号：US555863

申请日：1983-11-28

申请人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Kenichi Miyazaki ,  Takashi Kuriyama

发明人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Kenichi Miyazaki ,  Takashi Kuriyama

IPC分类号： H04N5/225 ,  H04N9/07 ,  H04N9/73 ,  H04N9/04

CPC分类号： H04N9/07 ,  H04N5/2256 ,  H04N9/735

摘要： A color TV imaging apparatus comprises a TV imaging device for generating a composite color TV video signal by use of a color separation stripe filter, at least two demodulators for individually producing color signal components by demodulating a carrier signal which is generated as an output signal from the imaging device, and a bias light supply device for applying bias light to a photoelectric transducer section of the imaging device through the filter. At least one of the quantity and color temperature of the bias light is set such that the carrier color signals to be demodulated by the demodulators become greater than the peak-to-peak value of noise contained in the signal. The quantity of bias light is adjusted by controlling bias light sources of the bias light supply device, while a color temperature of bias light is selected by means of color temperature conversion filters positioned in light outlet portions of a flat light conducting element which is included in the bias light supply device.

摘要翻译： 一种彩色电视摄像装置，包括：通过使用分色条形滤波器产生复合彩色TV视频信号的TV成像装置;至少两个解调器，用于通过解调作为输出信号产生的载波信号来分别产生彩色信号分量; 成像装置和偏置光供给装置，用于通过滤光器将偏光施加到成像装置的光电变换器部分。 偏置光的数量和色温中的至少一个被设置为使得由解调器解调的载波颜色信号变得大于包含在信号中的噪声的峰 - 峰值。 通过控制偏置光供给装置的偏置光源来调节偏置光的量，同时通过位于平面导光元件的光出射部分中的色温转换滤光片来选择偏置光的色温， 偏光装置。

公开(公告)号：US4277800A

公开(公告)日：1981-07-07

申请号：US129337

申请日：1980-03-11

申请人： Shintaro Nakagaki ,  Itsuo Takanashi ,  Koichiro Motoyama ,  Tadayoshi Miyoshi ,  Sumio Yokokawa ,  Kenichi Miyazaki

发明人： Shintaro Nakagaki ,  Itsuo Takanashi ,  Koichiro Motoyama ,  Tadayoshi Miyoshi ,  Sumio Yokokawa ,  Kenichi Miyazaki

IPC分类号： H04N9/04 ,  H04N9/07 ,  H04N9/083

CPC分类号： H04N9/07 ,  H04N9/083

摘要： A color television signal generating apparatus comprises a color-resolving striped filter, in a camera tube, for separating the output signal of the camera tube into required signals. The output of the camera tube is a superimposed signal comprising a direct wave signal containing signals of the three primary colors of said addition mixture color, and a high-band signal component comprising a group of modulated color signals resulting from an amplitude modulation of a carrier wave by the signals of two primary colors other than the primary color of the light transmitted through said first filter stripe, said carrier wave having a frequency equal to a space frequency determined by the number of said groups of filter stripes, and said carrier wave also having frequency components which are higher harmonics of the frequency of said carrier wave. The color television signal generating apparatus further comprises a first separation circuit for separating and deriving, out of the output signal of the camera tube, a fundamental wave component signal in which the carrier wave having the frequency equal to the space frequency is amplitude modulated, a second separation circuit for separating and deriving, out of the output signal of the camera tube, a second harmonics wave component signal in which a carrier wave having a frequency twice the space frequency is amplitude modulated, a multiplication circuit for multiplying the output signals of the first and second separation circuits, and a circuit for separating and deriving signals of two primary colors other than the primary color transmitted through the first filter stripe, responsive to the output signals of the multiplication means and the first separation circuit.

摘要翻译： 彩色电视信号发生装置包括在相机管中的分色条纹滤光器，用于将相机管的输出信号分离成所需信号。 相机管的输出是包括包含所述加法混合颜色的三原色的信号的直接波信号的叠加信号，以及包括由载波的幅度调制产生的一组调制的彩色信号的高频带信号分量 通过除了通过所述第一滤波器条纹的光的原色之外的两种原色的信号波，所述载波具有等于由所述滤波器条带组的数量确定的空间频率的频率，并且所述载波也 具有作为所述载波的频率的高次谐波的频率分量。 彩色电视信号发生装置还包括第一分离电路，用于分离和导出相机管的输出信号，其中具有等于空间频率的频率的载波被幅度调制的基波分量信号，a 第二分离电路，用于分离和导出相机管的输出信号中具有频率为空间频率的两倍的载波被调幅的二次谐波分量信号;乘法电路，用于将 第一分离电路和第二分离电路，以及用于分离和导出除了通过第一滤波器条带传输的原色之外的两种原色的信号的电路，其响应于乘法装置和第一分离电路的输出信号。

公开(公告)号：US4272779A

公开(公告)日：1981-06-09

申请号：US004721

申请日：1979-01-19

申请人： Shintaro Nakagaki ,  Itsuo Takanashi ,  Sumio Yokokawa ,  Tadayoshi Miyoshi ,  Koichiro Motoyama ,  Kenichi Miyazaki

发明人： Shintaro Nakagaki ,  Itsuo Takanashi ,  Sumio Yokokawa ,  Tadayoshi Miyoshi ,  Koichiro Motoyama ,  Kenichi Miyazaki

IPC分类号： H04N9/07 ,  H04N9/04

CPC分类号： H04N9/07

摘要： A signal processing circuit for a color television camera has filters supplied with a multiplex input signal. The direct wave signal includes a plurality of amplitude-modulated color component signals obtained from a camera tube of a color television camera. The tube filters the high-frequency components of the input signal. Detection and processing circuits detect the output signal of the high-pass filter and produce signals having restored DC components. The circuit provides gamma correction, white clipping, linear clipping, blanking signal mixing, or like signal processing with respect to the produced signal. A low-pass filter passes the input signal from the camera tube and filters the direct wave signal of the input signal. A processing circuit processes the output signals of the low-pass filter, and a matrix circuit matrixes the output signals of the detection and processing circuits to obtain three primary color signals. A color encoder provides a composite color video signal from the three primary color signals produced by the matrix circuit.

摘要翻译： 用于彩色电视摄像机的信号处理电路具有提供有复用输入信号的滤波器。 直接波信号包括从彩色电视摄像机的相机管获得的多个幅度调制色分量信号。 管过滤输入信号的高频分量。 检测和处理电路检测高通滤波器的输出信号并产生具有恢复的DC分量的信号。 该电路针对所产生的信号提供伽马校正，白削波，线性削波，消隐信号混合或类似的信号处理。 低通滤波器通过来自相机管的输入信号并对输入信号的直接波信号进行滤波。 处理电路处理低通滤波器的输出信号，并且矩阵电路对检测和处理电路的输出信号进行矩阵校准，以获得三原色信号。 彩色编码器提供由矩阵电路产生的三原色信号的复合彩色视频信号。

公开(公告)号：US4232331A

公开(公告)日：1980-11-04

申请号：US948253

申请日：1978-10-03

申请人： Koichiro Motoyama ,  Itsuo Takanashi ,  Tadayoshi Miyoshi ,  Shintaro Nakagaki ,  Sumio Yokokawa ,  Kenichi Miyazaki

发明人： Koichiro Motoyama ,  Itsuo Takanashi ,  Tadayoshi Miyoshi ,  Shintaro Nakagaki ,  Sumio Yokokawa ,  Kenichi Miyazaki

IPC分类号： H04N5/18 ,  H04N5/228 ,  H04N9/07 ,  H04N9/73 ,  H04N5/16

CPC分类号： H04N5/228

摘要： A circuit for stabilizing the black level in an output signal of a camera tube is employed in a color television camera. The camera tube has an optical filter with an optically black part extending in parallel with a beam scanning direction of the camera tube. The stabilizing circuit comprises a clamping circuit for clamping an output signal of the camera tube during a horizontal beam blanking period and for restoring a DC component of the output signal. A circuit responds to supplied sampling pulses during every vertical scanning period, for sampling and holding an output signal of the clamping circuit. A circuit feeds back a substantially negative holding voltage of the sampling and holding circuit, to the clamping circuit.

摘要翻译： 在彩色电视摄像机中采用用于稳定照相机管的输出信号中的黑电平的电路。 相机管具有光学黑色部分的光学滤光器，其与照相机管的光束扫描方向平行延伸。 稳定电路包括钳位电路，用于在水平波束消隐期间钳位相机管的输出信号，并用于恢复输出信号的直流分量。 一个电路在每个垂直扫描周期响应提供的采样脉冲，用于采样和保持钳位电路的输出信号。 电路将采样和保持电路的基本上负的保持电压反馈到钳位电路。

公开(公告)号：US5264951A

公开(公告)日：1993-11-23

申请号：US980121

申请日：1992-11-23

申请人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Ichiro Negishi ,  Ryusaku Takahashi ,  Tetsuji Suzuki ,  Fujiko Tatsumi ,  Keiichi Maeno

发明人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Ichiro Negishi ,  Ryusaku Takahashi ,  Tetsuji Suzuki ,  Fujiko Tatsumi ,  Keiichi Maeno

IPC分类号： G02F1/1347 ,  G02F1/135 ,  H04N9/31 ,  G02F1/03 ,  G03B21/14

CPC分类号： H04N9/3102 ,  G02F1/13473 ,  G02F1/135

摘要： There is provided an optical system for a spatial light modulator. The system comprises a light source for emitting an unpolarized light, a separator for separating a first linearly polarized light having a specified plane of polarization from the unpolarized light and polarizer for rotating the plane of polarization of the first linearly polarized light at a specified angle different from the specified angle to obtain a second linearly polarized light, wherein the second linearly polarized light is adopted as a reading light. Also provided is a method of photomodulation, comprising the steps of separating a light in the region of a specified wavelength from an unpolarized light, separating a first linearly polarized light having a specified plane of polarization from the light and obtaining a second linearly polarized light by rotating the plane of polarization of the first linearly polarized light at a specified angle.

摘要翻译： 提供了一种用于空间光调制器的光学系统。 该系统包括用于发射非偏振光的光源，用于从非偏振光和偏振器分离具有指定偏振光的第一线偏振光的分离器，用于将第一线性偏振光的偏振平面旋转到指定角度 从指定角度获得第二线偏振光，其中采用第二线偏振光作为读取光。 还提供了一种光调制方法，包括以下步骤：将特定波长区域中的光与非偏振光分离，将具有指定偏振面的第一直线偏振光与光分离，并通过以下步骤获得第二线偏振光： 使第一直线偏振光的偏振面以特定的角度旋转。

公开(公告)号：US5130826A

公开(公告)日：1992-07-14

申请号：US679602

申请日：1991-04-03

申请人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Ichiro Negishi ,  Tetsuji Suzuki ,  Fujiko Tatsumi ,  Ryusaku Takahashi ,  Keiichi Maeno

发明人： Itsuo Takanashi ,  Shintaro Nakagaki ,  Ichiro Negishi ,  Tetsuji Suzuki ,  Fujiko Tatsumi ,  Ryusaku Takahashi ,  Keiichi Maeno

IPC分类号： G02F1/03 ,  G02B27/14 ,  G02F1/13 ,  H04N9/31

CPC分类号： G02B27/149 ,  G02B27/1026 ,  G02B27/145 ,  H04N9/312

摘要： There is disclosed an optical system for a color picture display having three spatial light modulators of reflecting type corresponding to an optical image of one of three primary colors by photoelectric effect and photomodulation effect, a writing device for guiding writing lights each carrying the optical image of one of the colors to each device, a reading device for guiding reading lights each in the region of wavelength of one of the colors to each device and a composing device for composing a composed reading light of the reading lights which are emitted from the optical devices respectively after optically modulated. The optical system comprises an optical apparatus shared by the reading device and the composing device, having first, second and third prisms, a first dichroic filter provided between the first and the second prisms and a second dichroic filter provided between the second and the third prisms.

公开(公告)号：US5087929A

公开(公告)日：1992-02-11

申请号：US637171

申请日：1991-01-03

申请人： Itsuo Takanashi ,  Takashi Yamamura ,  Shintaro Nakagaki ,  Toshikatsu Ichito ,  Atsushi Nakano ,  Tadayuki Shimada ,  Toshio Konno

发明人： Itsuo Takanashi ,  Takashi Yamamura ,  Shintaro Nakagaki ,  Toshikatsu Ichito ,  Atsushi Nakano ,  Tadayuki Shimada ,  Toshio Konno

IPC分类号： G03G15/05 ,  G02F1/135 ,  G03G5/14 ,  G06K15/12

CPC分类号： G06K15/1295 ,  G02F1/135

摘要： A method of electrophotographic printing is disclosed. A recording medium comprising a photoconductive member and photo-modulation member laminated to each other, both exhibiting a photoelectric effect and a sensitized member made of a chargeable photoconductive member are arranged so as to face each other. A first electro-magnetic radiation beam (abbreviated in a beam hereinafter) which is intensity-modulated with data to be recorded is radiated to the recording medium at the photoconductive member side thereof to record the data to the photo-modulation member with the photoelectric effect. A second beam of constant intensity is radiated to the recording medium to emit therefrom a third beam exhibiting intensity variation subjected to the recorded data. The sensitized member is exposed with the third beam to form thereon a charge image corresponding to the recorded data. Toner is stacked onto the sensitized member formed with the charge image to form thereon a toner image. The toner image is then transferred onto a printing paper, thus to perform repeated printing utilizing the data once recorded to the recording medium.