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公开(公告)号：US20240219232A1
公开(公告)日：2024-07-04
申请号：US18335269
申请日：2023-06-15
Applicant: Jacov Tutavac , Dubravko Babic
Inventor： Jacov Tutavac , Dubravko Babic
CPC classification number: G01J3/0294 , B64G1/66 , G01J3/0208 , G01J3/0275 , G01J3/06 , G01J3/12 , G01J3/42 , G01J2003/066 , G01J2003/1213
Abstract: A light detection module has N optical channels, each with an optical filter, a detector, and an amplifier; and an N×1 switch with N input ports each connected to one corresponding output port of each channel to receive an amplified detector output corresponding to a filtered optical intensity incident on that detector. The switch cycles between channels, connecting each amplified detector output in turn to the output port. An ADC samples a time dependent optical intensity signal from the switch, generating a corresponding ADC digital signal output. A microcontroller, connected to the N×1 switch and the ADC, controls acquisition by the ADC to provide a digital voltage data stream from each channel; making the average optical intensity value characterizing the voltage data stream available from each channel at a digital output port of the microcontroller, as N data values, characterizing the light incident on the N channels of the module.
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公开(公告)号：US20170108378A1
公开(公告)日：2017-04-20
申请号：US15292244
申请日：2016-10-13
Inventor： Lianqing Zhu , Wei He , Xiaoping Lou , Feng Liu , Mingli Dong , Fei Luo , Wei Zhuang
CPC classification number: G01J3/1895 , G01J3/0208 , G01J3/027 , G01J3/06 , G01J3/28 , G01J2003/064 , G01J2003/066 , G02B6/02076 , G02B26/0816 , G02F2/00
Abstract: A fiber grating demodulation system for enhancing spectral resolution by finely adjusting an imaging focus mirror, includes a laser pump source, a wavelength division multiplexer, a fiber Bragg grating, a diaphragm, a slit, a collimating mirror, a light splitting grating, an imaging focus mirror, a linear array detector. The laser pump source, the wavelength division multiplexer, the fiber Bragg grating are connected in sequence, the wavelength division multiplexer is connected to the diaphragm. Light emitted from the laser pump source is multiplexed by the wavelength division multiplexer and then enters the fiber Bragg grating, a reflection spectrum of the fiber Bragg grating enters the slit of the fiber grating demodulation system as injected light. After passing through the slit, the injected light is reflected by the collimating mirror, the light splitting grating, and the imaging focus mirror in sequence, and is finally converged to the linear array detector.
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公开(公告)号：US4779216A
公开(公告)日：1988-10-18
申请号：US837438
申请日：1986-03-07
Applicant: John B. Collins
Inventor： John B. Collins
CPC classification number: G01J3/28 , G01J2003/066 , G01J2003/2866
Abstract: A method for calibrating a monochromator to compensate for mechanical imperfections in its diffraction grating and grating drive assembly employs a two stage interactive procedure which permits the use of small (0.2 nm) spectral regions for the identification of emission lines. An iterative, self-consistent, discrete Fourier transform is used for the determination of multiple positioning correction terms. When the Fourier calculations are completed, the results of the calibration procedure are presented by the system to the analyst for acceptance. If accepted, the positioning error of the primary calibration line is measured, stored and used by the system to maintain a zero centered distribution of positioning errors each time the monochromator is reinitialized.
Abstract translation: 用于校准单色仪以补偿其衍射光栅和光栅驱动组件中的机械缺陷的方法采用两级交互式过程，其允许使用小（0.2nm）光谱区域来识别发射线。 迭代，自相一致的离散傅里叶变换用于确定多个定位校正项。 当傅里叶计算完成时，校准程序的结果由系统提交给分析师进行验收。 如果接受，主要校准线的定位误差由系统测量，存储和使用，以便在每次单色仪重新初始化时保持定位误差的零中心分布。
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公开(公告)号：US5255071A
公开(公告)日：1993-10-19
申请号：US406726
申请日：1989-09-13
Applicant: Fred H. Pollak , Hong-En Shen
Inventor： Fred H. Pollak , Hong-En Shen
CPC classification number: G01N21/1717 , G01J1/24 , G01J2003/063 , G01J2003/066 , G01N2021/1725 , G01N21/55 , G01N2201/0695 , G01N2201/126
Abstract: A method and apparatus for determining the characteristics of materials, particularly of semi-conductors, semi-conductor heterostructures and semi-conductor interfaces by the use of photoreflectance, in which monochromatic light and an acousto-optically modulated light beam reflected from the sample is detected to produce a d.c. signal and an a.c. signal, whereby the d.c. signal is applied to one input of a computer and the a.c. signal is used with another input of the computer which controls the light intensity of the monochromatic light impinging on the sample to maintain the d.c. signal substantially constant. The modulation frequency of the modulated pump beam and/or the wavelength of the monochromatic light can also be varied by the computer. Information about trap times can be obtained by determining the dependence of the in-phase signal on the pump modulating frequency, respectively.
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公开(公告)号：US5164786A
公开(公告)日：1992-11-17
申请号：US720708
申请日：1991-06-25
Applicant: Michel Delhaye , Edouard Da Silva , Bernard Roussel
Inventor： Michel Delhaye , Edouard Da Silva , Bernard Roussel
CPC classification number: G01J3/2803 , G01J3/06 , G01J2003/066 , G01J2003/2826 , G01J2003/2833 , G01J2003/2893 , G01J2003/2896 , G01J2003/326 , G01J3/0294 , G01J3/32
Abstract: The invention relates to a spectrometry installation comprising an inlet, optical fiber means suitable for receiving an inlet beam and delivering a spectrally dispersed image of the beam which image is limited to a selected spectral band, a multi-channel detection module receiving said spectral image, and processor means. The optical filter means are provided with a deflector stage. Control means are associated with the optical deflector means to define the spectral band in terms of center frequency and band width, and control means are associated therewith for displacing the spectral image over the detection module. An electronic control unit is provided to control the control means and to control the processor means in a plurality of operating modes, each of which comprises joint control of the selected spectral band, of the displacement of the spectral image, and of the processor means, for the purpose of selectively using a particular set of detector components.
Abstract translation: 本发明涉及一种光谱测量装置，其包括入口，适于接收入射光束的光纤装置，并将该光束的光谱分散图像传送到所选择的光谱带，多通道检测模块接收所述光谱图像， 和处理器装置。 滤光器装置设置有偏转器级。 控制装置与光学偏转器装置相关联以根据中心频率和带宽限定光谱带，并且控制装置与其相关联，用于使检测模块上的光谱图像移位。 提供电子控制单元以控制控制装置并且以多个操作模式来控制处理器装置，每个操作模式包括所选频谱带的联合控制，频谱图像的位移以及处理器装置， 以便选择性地使用特定的一组检测器部件。
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Patent Agency Ranking
公开(公告)号：US5096295A
公开(公告)日：1992-03-17
申请号：US664592
申请日：1991-03-01
Applicant: Robert J. Krupa , Edward E. Owen , Stanley L. Shiller
Inventor： Robert J. Krupa , Edward E. Owen , Stanley L. Shiller
IPC: G01J3/06
CPC classification number: G01J3/06 , G01J2003/063 , G01J2003/066
Abstract: In its preferred embodiment, a scanning monochromator uses a pulse-driven micro-stepping motor to drive a spectral-dispersion element via a reduction-gear harmonic drive. The motor is directly coupled to the input hub of the reduction-gear drive, and the output hub of the reduction-gear drive directly supports the spectral-dispersion element. By selecting a motor with a great number of steps per revolution, and a harmonic drive with a great reduction ratio, a resolution of 5 million pulsed steps is available, per single rotation of the output hub of the reduction-gear drive. This translates into more than 600,000 incremental angular-displacement steps over a usable 45.degree. range of dispersion-element rotation.
Abstract translation: 在其优选实施例中，扫描单色仪使用脉冲驱动微步进电机经由减速齿轮谐波驱动来驱动频谱色散元件。 电机直接连接在减速齿轮传动装置的输入轮毂上，减速齿轮传动装置的输出轮毂直接支撑分光元件。 通过选择每转数很多的电机，以及减速比大的谐波驱动器，减速齿轮传动的输出轮毂每旋转一次就可以获得500万次脉冲步进的分辨率。 这在可用的45°范围的分散体旋转中转化为超过60万个增量角位移步长。
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公开(公告)号：US09683892B2
公开(公告)日：2017-06-20
申请号：US15292244
申请日：2016-10-13
Inventor： Lianqing Zhu , Wei He , Xiaoping Lou , Feng Liu , Mingli Dong , Fei Luo , Wei Zhuang
CPC classification number: G01J3/1895 , G01J3/0208 , G01J3/027 , G01J3/06 , G01J3/28 , G01J2003/064 , G01J2003/066 , G02B6/02076 , G02B26/0816 , G02F2/00
Abstract: A fiber grating demodulation system for enhancing spectral resolution by finely adjusting an imaging focus mirror, includes a laser pump source, a wavelength division multiplexer, a fiber Bragg grating, a diaphragm, a slit, a collimating mirror, a light splitting grating, an imaging focus mirror, a linear array detector. The laser pump source, the wavelength division multiplexer, the fiber Bragg grating are connected in sequence, the wavelength division multiplexer is connected to the diaphragm. Light emitted from the laser pump source is multiplexed by the wavelength division multiplexer and then enters the fiber Bragg grating, a reflection spectrum of the fiber Bragg grating enters the slit of the fiber grating demodulation system as injected light. After passing through the slit, the injected light is reflected by the collimating mirror, the light splitting grating, and the imaging focus mirror in sequence, and is finally converged to the linear array detector.
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公开(公告)号：US5015069A
公开(公告)日：1991-05-14
申请号：US312537
申请日：1989-02-17
Applicant: Raymond G. Bryan , Louis Hlousek
Inventor： Raymond G. Bryan , Louis Hlousek
CPC classification number: G02B26/0808 , G01J3/06 , G01J2003/066 , G01J3/18
Abstract: In a spectrophotometer application where high speed positioning is critical, a galvanometer in conjunction with a microprocessor controlled hybrid digital/analog servo system is used to rotate a diffraction grating for wavelength selection. A table containing digital position information for all wavelengths is accessed by the microprocessor to perform wavelength changes. The use of the table permits the determination of grating position to yield a desired wavelength for a system where the axis of rotation does not intersect a point on the surface of the diffraction grating. That is, the diffraction grating can be rotated about an axis coinciding with its center of gravity.
Abstract translation: 在高速定位至关重要的分光光度计应用中，使用与微处理器控制的混合数字/模拟伺服系统结合的电流计旋转用于波长选择的衍射光栅。 微处理器访问包含所有波长的数字位置信息的表以执行波长改变。 使用该表格允许确定光栅位置以产生用于旋转轴线不与衍射光栅表面上的点相交的系统的期望波长。 也就是说，衍射光栅可以围绕与其重心一致的轴线旋转。
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公开(公告)号：US4945249A
公开(公告)日：1990-07-31
申请号：US294087
申请日：1989-01-05
Applicant: Andrew I. Grant , Martyn T. MacPherson , David G. Stevens
Inventor： Andrew I. Grant , Martyn T. MacPherson , David G. Stevens
CPC classification number: G01J3/44 , G01N21/64 , G01J2003/066 , G01J3/2803 , G01N2201/0214
Abstract: Apparatus for detecting an anomaly, (e.g. the presence of a hydrocarbon seep) at or near a water or land surface comprises means for generating a beam, preferably a pulsed beam, of primary light radiation, preferably ultra-violet light, and directing the beam towards the surface. The beam is sufficiently intense and of such a spectral composition that the beam causes the anomaly, if present, to emit secondary light radiation. The apparatus also comprises means for collecting the secondary light radiation, or means for collecting solar induced secondary light radiation, spectral analysis means for analysing the spectrum of the secondary radiation, and a high resolution, multi-element digitizing detector for recovering the analyzed secondary radiation. The detector has a plurality of detection channels positioned across the spectrum of the backscattered primary radiation and emitted secondary radiation, the channels being software configurable and under the control of a digitally addressable computer-operated controller. The concentration of used channels across the plurality of channels is adjustable and increasable in the regions of the spectrum of greatest interest and decreasable in the regions of least interest.
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公开(公告)号：US4916645A
公开(公告)日：1990-04-10
申请号：US201250
申请日：1988-06-02
Applicant: Charles E. Wuest , John B. Collins
Inventor： Charles E. Wuest , John B. Collins
IPC: G01J3/02 , G01J3/06 , G01J3/18 , G01J3/28 , G01J3/32 , G01J3/443 , G01N21/71 , G01N21/73 , G01N21/74
CPC classification number: G01J3/28 , G01J3/32 , G01J2003/063 , G01J2003/066 , G01J3/18 , G01N21/73 , G01N21/74
Abstract: Iterative compensation of drift of peak positions of spectral lines is effected in a spectral monochromator including a grating, a detector of spectral fractions of a spectral band, a stepper motor for varying relative orientation of the grating and the detector, and a computer. Computer-defined spectral windows each encopasses a spectral band and has an initial spectral center. Each window is scanned to determine a peak spectral position. Calculation is made for determining a spectral position error of the peak position from the initial center for each corresponding window. A functional average of the offsets for the peaks is calculated as a linear function of window position, and a revised spectral center for each window is calculated as being equal to the initial center plus the functional average for the window position determined from the linear function. Each window is shifted correspondingly. The step of successively scanning through each window is repeated to determine a new peak position for each corresponding band, whereby each new peak position is maintained near the spectral center of each corresponding window.
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