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1.发明授权Method for measuring internal information in a scattering medium and apparatus for the same 失效用于测量散射介质中的内部信息的方法及其装置
公开(公告)号：US5640247A
公开(公告)日：1997-06-17
申请号：US353202
申请日：1994-12-01
IPC分类号： G01N33/72 , A61B5/145 , A61B5/1455 , G01J1/00 , G01N21/17 , G01N21/49 , G01N21/47 , A61B5/00 , A61B6/00 , G01N21/00
CPC分类号： G01N21/49
摘要： Light having a predetermined wavelength and various incident angle components to be incident on a surface of a scattering medium to generate an equivalent point light source or a group of equivalent point light sources near or on the surface of the scattering medium, and light diffused during propagation in the scattering medium is detected outside, and considering isotropic light from the equivalent light sources is immediately diffused, the optically detected signal is processed to detect a predetermined parameter which is primary information and this predetermined parameter is processed to measure internal information which is secondary information in the scattering medium with high accuracy.
摘要翻译： 具有预定波长的光和入射到散射介质的表面上的各种入射角分量的光，以在散射介质的表面附近或表面上产生等效点光源或一组等效点光源，以及在传播期间漫射的光 在散射介质外部检测到，考虑到来自等效光源的各向同性光立即扩散，对光检测信号进行处理，以检测作为主要信息的预定参数，并且处理该预定参数以测量作为次要信息的内部信息 在散射介质中具有高精度。
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公开(公告)号：US5307199A
公开(公告)日：1994-04-26
申请号：US735792
申请日：1991-07-25
CPC分类号： G02F1/293
摘要： The optical apparatus includes first and second deflection members, a mask, a pumping light source, and a controller. The first and second deflection members are formed of nonlinear optical material whose refractive index is changed upon light radiation. The mask is arranged on an optical path extending from a front side of the first deflection member to a rear side of a second deflection member. The mask has a predetermined transmission pattern. The pumping light source radiates first and second beams on predetermined regions of the first and second deflection members. This changes the refractive indices of the predetermined regions to bend the optical path. The controller variably controls the intensity of the first and second beams.
摘要翻译： 光学装置包括第一和第二偏转构件，掩模，泵浦光源和控制器。 第一偏转构件和第二偏转构件由折射率在光辐射下变化的非线性光学材料形成。 掩模布置在从第一偏转构件的前侧延伸到第二偏转构件的后侧的光路上。 掩模具有预定的传输图案。 泵浦光源在第一和第二偏转构件的预定区域上辐射第一和第二光束。 这改变了预定区域的折射率以弯曲光路。 控制器可变地控制第一和第二光束的强度。
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3.发明授权
公开(公告)号：US5491329A
公开(公告)日：1996-02-13
申请号：US353358
申请日：1994-12-02
申请人： Tsuneyuki Urakami , Yutaka Tsuchiya
发明人： Tsuneyuki Urakami , Yutaka Tsuchiya
CPC分类号： G01N21/49 , A61B5/0059
摘要： Light the intensity of which is modulated to the initial intensity by a modulating signal having an ac component with a predetermined frequency and which is from the intensity tuneable light irradiating unit irradiates the scattering and absorption medium which is an object to be measured. The modulated light incident on the scattering and absorption medium propagates in the scattering and absorption medium, emerges therefrom and is incident to the photodetecting unit, and the photodetecting unit converts the incident light into an electric signal corresponding to the intensity of the incident light, and thereafter, outputs the electric signal as an optically detected signal. The feedback unit extracts the ac component from the input optically detected signal, and the intensity of the ac electric signal and the adjusting value are compared and the variation of the quantity of generating light is sent to the intensity tuneable light irradiating unit. Then, the phase difference detection is performed as the gain of the photodetecting means is fixed and the intensity of the ac component having a modulation frequency emitted from the photodetecting means is maintained so as to substantially match with the preset adjusting value.
摘要翻译： 通过具有预定频率的交流分量并且来自强度可调光照射单元的调制信号将其强度调制到初始强度的光照射作为待测对象的散射和吸收介质。 入射在散射和吸收介质上的调制光在散射和吸收介质中传播，从中出射并入射到光电检测单元，光电检测单元将入射光转换成与入射光强度对应的电信号， 此后，作为光检测信号输出电信号。 反馈单元从输入的光检测信号中提取ac分量，并且比较ac电信号和调整值的强度，并将发光量的变化发送到强度可调光照射单元。 然后，随着光检测装置的增益被固定，并且保持从光检测装置发射的调制频率的交流分量的强度，使其与预设的调整值基本一致，进行相位差检测。
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公开(公告)号：US4994663A
公开(公告)日：1991-02-19
申请号：US355608
申请日：1989-05-23
摘要： An apparatus for measuring an autocorrelation wavaeform of intensity of input light comprises a beam splitting means for dividing the input light into two light beams, a photoelectric converter for converting one of the divided beams into an electrical signal, an optical modulating means for modulating the other light beam in accordance with the electrical signal, a delay means for varying a relative delay time between arrival times to the optical modulating means of the light beam and the electrical signal, and a photodetector having a response speed faster than that of the delay time variation for detecting output light from the optical modulating means.
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公开(公告)号：US5237388A
公开(公告)日：1993-08-17
申请号：US762457
申请日：1991-09-19
申请人： Isuke Hirano , Hironori Takahashi , Tsuneyuki Urakami , Tamiki Takemori , Yutaka Tsuchiya , Shinichiro Aoshima
发明人： Isuke Hirano , Hironori Takahashi , Tsuneyuki Urakami , Tamiki Takemori , Yutaka Tsuchiya , Shinichiro Aoshima
CPC分类号： G01J4/04
摘要： Young's interferometer consisting of a single slit and a double slit member, and an analyzer are arranged along the axis of light to be measured. Parallel slits of the double slit member are provided with respective polarizers whose paralyzing directions are at .+-.45.degree. to the longitudinal direction of the parallel slits. The polarizing direction of the analyzer is set in parallel with the parallel slits. The incident light passes through Young's interferometer and the analyzer to form an interference fringe, which is detected by an image detector unit. An image analyzer unit produces an intensity profile of the interference fringe and determines the polarization state of the incident light, for instance, by comparing the produced intensity profile with conceivable profiles stored in advance.
摘要翻译： 由单个狭缝和双缝隙构件组成的杨氏干涉仪和分析器沿着待测量的光轴设置。 双缝构件的平行狭缝设置有各自的偏振器，其麻痹方向与平行狭缝的纵向方向成+/- 45度。 分析仪的偏振方向与平行狭缝平行设置。 入射光通过杨氏干涉仪和分析仪，形成一个由图像检测器单元检测的干涉条纹。 图像分析器单元产生干涉条纹的强度分布并且确定入射光的偏振状态，例如通过将产生的强度分布与预先存储的可想到的曲线进行比较。
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公开(公告)号：US5198921A
公开(公告)日：1993-03-30
申请号：US795397
申请日：1991-11-21
CPC分类号： G02B6/2713 , G02B6/105 , G02B6/126 , G02B6/276 , H01S3/06708 , H01S5/5036 , H01S3/06712
摘要： A semiconductor light amplifier is driven by a drive device, and selectively amplifies one of a TM mode component and a TE mode component of input light. For example, TE mode light is selectively amplified by making thickness of the active layer of the semiconductor light amplifier not more than 0.05 .mu.m, or by tilting at least one of the entrance and exit faces of the semiconductor light amplifier by 10 to 16 degrees. An another type of light amplifying polarizer, input signal light and excitation light are combined by a half mirror or an optical coupler, and combined light is input to a rare-earth-element doped, polarization maintaining optical fiber.
摘要翻译： 半导体光放大器由驱动装置驱动，并且选择性地放大输入光的TM模式分量和TE模式分量之一。 例如，通过使半导体光放大器的有源层的厚度不大于0.05μm，或者通过使半导体光放大器的入射面和出射面中的至少一个倾斜10〜16度来选择性地放大TE模式光 。 另一种类型的光放大偏振器，输入信号光和激发光通过半透半反镜或光耦合器组合，组合光输入到稀土元素掺杂的保偏光纤。
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公开(公告)号：US5025142A
公开(公告)日：1991-06-18
申请号：US353948
申请日：1989-05-19
IPC分类号： G02B27/00 , G02F1/35 , H01S5/00 , H04B10/00 , H04B10/07 , H04B10/293 , H04B10/299
CPC分类号： H04B10/299 , H04B10/2914
摘要： A light waveform shaping apparatus comprises; a beam splitting means for branching an input optical signal into two optical signals; a photoelectric converter for converting one of the two branched optical signals into an electrical signal; an optical amplifier whose gain is adjustable by a controlling electrical signal, for amplifying an optical signal; an input optical path for introducing the other branched optical signal to the optical amplifier; and an electrical circuit for introducing the electrical signal from the photoelectric converter to the optical amplifier; wherein the optical and controlling electrical signals are supplied to the optical amplifier at a predetermined timing of generally coincident arrival.
摘要翻译： 光波形整形装置包括： 分束装置，用于将输入光信号分成两个光信号; 用于将两个分支光信号之一转换为电信号的光电转换器; 光放大器，其增益由控制电信号调节，用于放大光信号; 用于将另一分支光信号引入光放大器的输入光路; 以及用于将来自光电转换器的电信号引入到光放大器的电路; 其中所述光学和控制电信号在大致重合到达的预定定时被提供给所述光放大器。
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公开(公告)号：US4958354A
公开(公告)日：1990-09-18
申请号：US348450
申请日：1989-05-08
IPC分类号： H01S3/137 , G05D25/02 , H01S3/131 , H01S3/23 , H01S5/06 , H01S5/068 , H01S5/0683 , H01S5/50 , H05B37/02
CPC分类号： H05B37/02 , G05D25/02 , H01S5/0683 , H01S5/50
摘要： A light intensity stabilizing apparatus comprises an optical amplifier such as a non-resonant traveling-wave type optical amplifier, whose gain is adjustable by a controlling electrical signal and which amplifies incident light emitted from a light source, a beam splitting means for branching output light of the optical amplifier into stabilized output light and feedback light, a light intensity detector for converting said feedback light into an electrical signal, and a control unit for producing said controlling electrical signal in accordance with said electrical signal from said light intensity detector.
摘要翻译： 一种光强度稳定装置，其特征在于包括：非均匀行波型光放大器等光放大器，其增益可通过控制电信号进行调节，并放大从光源发射的入射光;分束装置， 的光放大器转换成稳定的输出光和反馈光，用于将所述反馈光转换成电信号的光强度检测器，以及用于根据来自所述光强度检测器的所述电信号产生所述控制电信号的控制单元。
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9.发明授权Concentration measuring method and apparatus for absorption component in scattering medium 有权散射介质中吸收组分的浓度测量方法和装置公开(公告)号：US06567165B1
公开(公告)日：2003-05-20
申请号：US09672832
申请日：2000-09-29
申请人： Yutaka Tsuchiya , Tsuneyuki Urakami
发明人： Yutaka Tsuchiya , Tsuneyuki Urakami
IPC分类号： G01N2100
CPC分类号： G01N21/49
摘要： A concentration measuring apparatus for an absorption component in a scattering medium includes a light source (2) for generating at least two light rays having predetermined wavelengths, the light rays having different transport scattering coefficients for a scattering medium (20) as an object to be measured, and a known ratio of the transport scattering coefficients; light incidence means (6) for making the light rays incident from a light incident position into the scattering medium (20); photodetection means (12), (13) for detecting the light ray which has propagated inside the scattering medium (20) at at least one photodetection position different from the light incident position to acquire at least one photodetection signal; parameter detection means (15) for detecting, on the basis of the photodetection signal, a light intensity and a mean flight pathlength at the light detection position for each of the at least two light rays having predetermined wavelengths; and arithmetic processing means (16) for calculating a concentration of an absorption component on the basis of a predetermined relationship between the ratio of the transport scattering coefficients, the light intensity, the mean flight pathlength, and a difference between absorption coefficients per unit concentration of the absorption component for the at least two light rays having predetermined wavelengths.
摘要翻译： 用于散射介质中的吸收组分的浓度测量装置包括用于产生具有预定波长的至少两个光线的光源（2），作为对象的散射介质（20）具有不同的传输散射系数的光线 测量和已知的传输散射系数比; 光入射装置（6），用于使来自光入射位置的光线入射到散射介质（20）中; 用于检测在与所述光入射位置不同的至少一个光电检测位置在所述散射介质（20）内传播的光线的光检测装置（12），（13），以获取至少一个光电检测信号; 参考检测装置（15），用于根据所述光检测信号，针对具有预定波长的所述至少两个光线检测所述光检测位置处的光强度和平均飞行路径长度; 以及运算处理装置（16），用于基于传输散射系数的比率，光强度，平均飞行路径长度以及每单位浓度的吸收系数之间的预定关系来计算吸收分量的浓度 所述至少两个具有预定波长的光线的吸收分量。
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10.发明授权Optical measuring method and an optical measuring apparatus for determining the internal structure of an object 失效光学测量方法和用于确定物体的内部结构的光学测量装置
公开(公告)号：US5774223A
公开(公告)日：1998-06-30
申请号：US703766
申请日：1996-08-27
CPC分类号： A61B5/0059
摘要： An optical measuring method and an optical measuring apparatus are capable of obtaining the true mean time delay of a light waveform within a short time for the purpose of obtaining information on the internal structure of an object. Calculations include a first mean time delay when the light path includes the object, a second mean time delay when the light path does not include the object, and a subtraction of the second mean time delay from the first mean time delay to obtain a true mean time delay.
摘要翻译： 光学测量方法和光学测量装置能够在短时间内获得光波形的真实平均时间延迟，以获得关于对象的内部结构的信息。 计算包括当光路包括物体时的第一平均时间延迟，当光路不包括物体时的第二平均时间延迟，以及从第一平均时间延迟减去第二平均时间延迟以获得真实平均值 时间延迟
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