公开(公告)号：US4167338A

公开(公告)日：1979-09-11

申请号：US831134

申请日：1977-09-07

Applicant: Thaddaus Kraus

Inventor： Thaddaus Kraus

IPC: G01J3/433 ,  G01J3/42 ,  G01J3/48

CPC classification number: G01J3/433

Abstract: A method for determining the quantity ratio of two components of a multi-substance mixture whose absorption bands are adjacent to each other and overlap comprises using an interference filter which is rotated in a uniform rotation about a first axis through the filter plane which forms with a perpendicular erected on the filter plane a fixed angle .beta. which is not equal to zero. The filter is rotatably arranged about a second axis through the filter plane and the method is characterized by adjusting the angle .alpha. which the axis of rotation forms with the ray in the range of .beta. is less than .alpha. so that a signal corresponding to the first derivative of the spectral intensity distribution of the radiation transmitted by the substance mixture just passes through zero and a quantity correlated with this angle is used as a measure of the quantity ratio. The radiation modulator for determining the quantity ratio includes a housing having an opening for the passage of the light ray therethrough and a filter in the housing in the path of the beam. The filter is mounted for rotation about a first axis comprising the axis of the filter and is mounted for pivoting about a second axis also going through the filter. The first axis is such that the area normal thereof forms with the first axis a fixed angle .beta. and the first axis is rotatable about the second axis and an angle .alpha. is formed between the first axis in the ray direction which may be read and indicated and the filter is adjustable to vary the angle.

Abstract translation: 一种用于确定其吸收带彼此相邻并且重叠的多物质混合物的两种组分的量比的方法包括使用干涉滤光器，所述干涉滤光器以围绕第一轴的均匀旋转通过过滤平面旋转，所述过滤平面与 垂直竖立在过滤平面上，固定角度β不等于零。 过滤器绕第二轴线可旋转地布置通过过滤器平面，并且该方法的特征在于调整旋转轴线形成的角度α，β的范围内的光线小于α，使得对应于一阶导数的信号 由物质混合物传播的辐射的光谱强度分布刚好通过零，并且与该角度相关的量被用作量比的量度。 用于确定数量比率的辐射调制器包括具有用于光线通过的开口的壳体和在梁的路径中的壳体中的过滤器。 安装过滤器以围绕包括过滤器的轴线的第一轴线旋转，并且安装成围绕也穿过过滤器的第二轴线枢转。 第一轴线使得其第一轴线与第一轴线形成固定角度β并且第一轴线可围绕第二轴线旋转并且在可以被读取和指示的射线方向上的第一轴线之间形成角度α，并且 过滤器可调，以改变角度。

公开(公告)号：US4090792A

公开(公告)日：1978-05-23

申请号：US698559

申请日：1976-06-22

Applicant: Konrad Bunge

Inventor： Konrad Bunge

IPC: G01J3/433 ,  G01N21/27 ,  G01J3/50 ,  G01N21/24

CPC classification number: G01J3/433

Abstract: In a single beam photometer the transmitted radiation is modulated in respect of wavelength. As the modulator, an interference pattern filter is used, whose transmitted wavelength agrees in the middle approximately with the absorption band to be measured. The interference pattern filter is either arranged so as to be rotatable in the beam path or oscillates at right angles to the optical axis. The electronic system is tuned to the first harmonic of the interference pattern filter frequency; i.e. the effects of signals of other frequencies are suppressed by the electronics.

Abstract translation: 在单光束光度计中，透射辐射相对于波长进行调制。 作为调制器，使用干涉图案滤波器，其透射波长近似于待测量的吸收带。 干涉图案滤波器被布置成可以在光束路径中旋转或者与光轴成直角振荡。 电子系统调谐到干涉图案滤波频率的一次谐波; 即其他频率的信号的影响被电子设备抑制。

公开(公告)号：US3803595A

公开(公告)日：1974-04-09

申请号：US3696170

申请日：1970-05-13

Applicant: MC MILLAN E

Inventor： MC MILLAN E

IPC: G01J3/00 ,  G01J3/433 ,  G01N33/00 ,  G01S7/41 ,  G01S9/00 ,  G01J3/28

CPC classification number: G01J3/4338 ,  G01N33/0027 ,  G01S7/411

Abstract: A novel system of monochromatic devices for use within the Earth''s atmosphere comprising an emission exciter and an emission detector for the discovery, identification and location of organic vapors of natural gasoline and fuel oil, other vapors, gases, liquids and solids, each disposed in free space along a boundary of other material. The exciter radiates such materials with electromagnetic waves at frequencies above at least one of the spaced electronic, vibrational and rotational frequencies characteristic of and identifying them. The radiation may be at a single frequency sweeping continuously through the portion of the frequency range which it is desired to examine, or alternatively at a plurality of spaced frequencies, each simultaneously sweeping a different portion of the range. The detector which may be disposed remotely from a material, resolves and measures the frequencies of the excited emission. Location of a material may be by triangulation, or alternatively by measurement of range and direction.

Abstract translation: 一种在地球大气中使用的单色设备的新型系统，包括用于发现，识别和定位天然汽油和燃料油，其他蒸气，气体，液体和固体的有机蒸气的排放激发器和排放检测器，每个处置自由 沿着其他材料边界的空间。 激励器用电磁波辐射这种材料，频率高于其特征和识别它们的间隔的电子，振动和旋转频率中的至少一个。 辐射可以是在频率范围内连续扫描的单个频率，期望检查的频率范围，或者以多个间隔的频率，每个同时扫掠该范围的不同部分。 可以远离材料设置的检测器解析并测量被激发的发射的频率。 材料的位置可以通过三角测量，或者通过测量范围和方向。

公开(公告)号：US3641350A

公开(公告)日：1972-02-08

申请号：US3641350D

申请日：1970-09-08

Applicant: US NAVY

Inventor： PETROPOULAS SPYROS K ,  JEHLE ROBERT E ,  HALBERSTAM MENDEL M

IPC: G01J3/00 ,  G01J3/433 ,  G01J5/52 ,  G01J3/34

CPC classification number: G01J3/433 ,  G01J3/021 ,  G01J5/52

Abstract: The radiant energy from a known live source impinges on a radiation collector which in turn directs the energy through a movable slit on to a rotating reticle having alternate reflecting and transmitting segments. A reference source also directs energy on to the reticle and the reticle output is directed toward a sensor whose output is processed by a differential amplifier and a signal amplifier. A reference phase generator circuit controls the gain of the differential amplifier. The output of the signal amplifier is further processed to provide only the low frequencies, which are then amplified and analyzed to provide a scintillation spectrum. A shimmer output is obtained by eliminating the low frequencies and applying the resultant to a limiter and a discriminator. The modulation transfer function is derived by combining, in an operational amplifier, the low-passed frequencies from the signal amplifiers and the peak detected high frequencies.

Abstract translation: 来自已知有源光源的辐射能量照射在辐射收集器上，辐射收集器又将能量通过可移动狭缝引导到具有交替反射和传输段的旋转掩模版上。 参考源还将能量引导到掩模版，并且光栅输出被引导到传感器，其输出由差分放大器和信号放大器处理。 参考相位发生器电路控制差分放大器的增益。 进一步处理信号放大器的输出以仅提供低频，然后将其放大和分析以提供闪烁光谱。 通过消除低频并将结果应用于限幅器和鉴频器来获得闪烁输出。 调制传递函数是通过在运算放大器中组合来自信号放大器的低通频率和检测到的峰值的高频导出的。

公开(公告)号：US3578866A

公开(公告)日：1971-05-18

申请号：US3578866D

申请日：1969-05-09

Applicant: CALIFORNIA INST OF TECHN

Inventor： KOHLER BRYAN E ,  DUBIN ALAN S

IPC: G01J3/433 ,  G01J3/00 ,  G01J3/42

CPC classification number: G01J3/433

Abstract: An optical spectrometer is adapted to provide differential wavelength modulation of a spectral signal by vibrating a photosensitive cell in the focal plane of the spectrograph. A synchronous detector is employed to demodulate the output signal of the photosensitive cell, and thereby provide to a recording device a signal that is the derivative of the spectral signal.

公开(公告)号：US3565567A

公开(公告)日：1971-02-23

申请号：US3565567D

申请日：1968-06-25

Applicant: BAUSCH & LOMB

Inventor： RAINS STEPHEN D

IPC: G01J3/433 ,  G01N21/31 ,  G01J3/30 ,  G01J3/12

CPC classification number: G01N21/3103 ,  G01J3/433

Abstract: A BEAM OF RADIATION FROM A CONTINUUM SOURCE IS DIRECTED THROUGH AN ATOMIC VAPOR. A RADIATION SENSITIVE DETECTOR MONITORS THE RADIATION FROM THE ATOMIC VAPOR. A MODULATOR IS INCLUDED SO THAT THE DETECTOR RECEIVES A WAVELENGTH MODULATED SIGNAL THAT PERIODICALLY INCLUDES THE WAVELENGTH OF THE SPECTRAL LINE CHARACTERISTIC OF THE ELEMENT TESTED. THE RADIATION SENSITIVE DETECTOR GENERATES A SIGNAL INDICATING THE PRESENCE AND/OR CONCENTRATION OF THE ELEMENT BY DETERMINING THE AMOUNT OF RADIATION ABSORBED, OR THE INTENSITY OF ATOMIC FLUORESCENCE EMITTED.

公开(公告)号：US12292332B2

公开(公告)日：2025-05-06

申请号：US17622641

申请日：2020-06-19

Applicant: UNIVERSIDAD CARLOS III DE MADRID

Inventor： Pedro Martín Mateos ,  Cristina De Dios Fernández ,  Óscar Elías Bonilla Manrique ,  Guillermo Andrés Guarnizo Herreño

IPC: G01J3/45 ,  G01J3/28 ,  G01J3/433

Abstract: A method for generating a illumination dual-comb signal that provides a low frequency train of interferograms (180) readable by a regular video-rate camera (160) comprising N pixels and a sampling frequency of V Hz to extract hyperspectral information (170), the method comprising providing a monochromatic signal, splitting the monochromatic signal in two split monochromatic signals, frequency shifting each monochromatic signal with an offset frequency below V 2 ⁢ Hz , generating two frequency combs having a difference in repetition below V 2 ⁢ Hz by a nonlinear modulation of the two split monochromatic signals, generate the illumination dual-comb signal, Illuminating a target and employing a video-rate camera (160) to read a low frequency train of interferograms (180) based on a reflected and/or transmitted signal of the illumination dual-comb signal and performing Fourier transformation of the low frequency train of interferograms (180) detected by each pixel from the N pixels to extract the hyperspectral information (170).

公开(公告)号：US12276549B2

公开(公告)日：2025-04-15

申请号：US17933735

申请日：2022-09-20

Applicant: Vector Atomic, Inc.

Inventor： Jonathan David Roslund ,  Martin Machai Boyd ,  Arman Cingoz ,  William David Lunden

IPC: G01J3/433 ,  G01J3/02

Abstract: Embodiments herein describe spectroscopy systems that use an unmodulated reference optical signal to mitigate noise, or for other advantages. In one embodiment, the unmodulated reference optical signal is transmitted through the same vapor cell as a modulated pump optical signal. As such, the unmodulated reference optical signal experiences absorption by the vapor, which converts laser phase noise to amplitude noise like the other optical signals passing through the vapor cell. In one embodiment, the unmodulated reference optical signal has an optical path in the gas cell that is offset (or non-crossing) from the optical path of the modulated pump optical signal. The unmodulated reference optical signal allows removal or mitigation of the noise on the other optical signal.

公开(公告)号：US12212112B2

公开(公告)日：2025-01-28

申请号：US17546153

申请日：2021-12-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tasuku Nakamura ,  Yasuhisa Inada

IPC: G01J3/02 ,  G01J3/10 ,  G01J3/427 ,  G01J3/433 ,  H01S3/00 ,  H01S3/086 ,  H01S3/10 ,  H01S3/23 ,  H01S5/00 ,  G01J3/42 ,  H01S3/13 ,  H01S5/10

Abstract: A dual optical frequency comb light-emitting device includes a first optical-frequency-comb laser source that includes a first laser resonator having a first optical path length, a second optical-frequency-comb laser source that includes a second laser resonator having a second optical path length different from the first optical path length, and an optical coupler that causes a first portion of first optical-frequency-comb laser light emitted from the first laser resonator to enter the second laser resonator. The first optical-frequency-comb laser source outputs a second portion of the first optical-frequency-comb laser light to an outside. The second optical-frequency-comb laser source outputs second optical-frequency-comb laser light emitted from the second laser resonator to the outside.

公开(公告)号：US20250020509A1

公开(公告)日：2025-01-16

申请号：US18771040

申请日：2024-07-12

Applicant: Charles River Laboratories International, Inc.

Inventor： John Weinacht ,  Andrew Casperson

IPC: G01J3/28 ,  B01L3/00 ,  G01J3/02 ,  G01J3/433

Abstract: Some aspects of the present disclosure are generally directed to spectrophotometers configured to be coupled to microfluidic sample cartridges. In some embodiments, spectrophotometers comprising less complex circuitry may lead to a more robust functionality with consistent optical sensing performance. This may include the use of components with different average lifetimes being positioned on different printed circuit boards, the use of integrated photodiode modules for sensing applications, and/or temperature sensors compressed between a heating block and one or more corresponding printed circuit boards.