公开(公告)号：US5220172A

公开(公告)日：1993-06-15

申请号：US763837

申请日：1991-09-23

Applicant: John W. Berthold ,  Michael L. Malito ,  Larry Jeffers

Inventor： John W. Berthold ,  Michael L. Malito ,  Larry Jeffers

IPC: G01N21/64 ,  G01N21/85

CPC classification number: G01N21/6408 ,  G01N21/645 ,  G01N2021/6432 ,  G01N21/85 ,  G01N2201/084

Abstract: A method and appartus for measuring lignin concentration in an undiluted sample of wood pulp or black liquor comprises a light emitting arrangement for emitting an excitation light through optical fiber bundles into a probe which has a sensing end facing the sample. The excitation light causes the lignin concentration to produce fluorescent emission light which is then conveyed through the probe to analyzing equipment which measures the intensity of the emission light. Measures are taken to maximize the emission light intensity which is due to lignin concentration and distinguish it from background and interfering light. The fluorescent light intensity is found to drop off in a predictable manner with increased lignin concentration.

Abstract translation: 用于测量未经稀释的木浆或黑液样品中的木质素浓度的方法和装置包括用于通过光纤束将激发光发射到具有面向样品的感测端的探针的发光装置。 激发光使木质素浓度产生荧光发射光，然后将荧光发射光通过探针传送到测量发射光强度的分析设备。 采取措施来最大化由木质素浓度引起的发射光强度，并将其与背景和干扰光区分开来。 发现荧光强度随着木质素浓度增加而以可预测的方式下降。

公开(公告)号：US5177561A

公开(公告)日：1993-01-05

申请号：US831529

申请日：1992-02-05

Applicant: Milan Milosevic ,  Nicolas J. Harrick

Inventor： Milan Milosevic ,  Nicolas J. Harrick

IPC: G01J3/02 ,  G01N21/25 ,  G01N21/35

CPC classification number: G01J3/02 ,  G01J3/0205 ,  G01J3/0286 ,  G01J3/0291 ,  G01N21/255 ,  G01N2021/174 ,  G01N2021/1793 ,  G01N2021/3595 ,  G01N2021/6469 ,  G01N21/474 ,  G01N2201/084

Abstract: Optical spectroscopy in a purging atmosphere wherein an optical accessory is gas-tight coupled in the spectrometer sample compartment to the open beam port of the spectrometer, whereby the same purging gas used by the spectrometer can be employed to purge the accessory. Where the accessory allows external sample placement or external adjustments, rapid sample changing or adjustment is possible without breaking the purge seal. In another embodiment, the accessory has its own purge inlet and sealed windows for receiving the spectrometer beam.

Abstract translation: 在清洗气氛中的光谱学，其中光学附件在光谱仪样品室中气密耦合到光谱仪的开口光束端口，由此可以使用由光谱仪使用的相同的净化气体来清洗附件。 如果附件允许外部样品放置或外部调整，可以快速进行样品更换或调整，而不会破坏吹扫密封。 在另一个实施例中，附件具有其自己的吹扫入口和用于接收光谱仪束的密封窗口。

公开(公告)号：US5157457A

公开(公告)日：1992-10-20

申请号：US592501

申请日：1990-10-03

Applicant: Henry F. Taylor

Inventor： Henry F. Taylor

IPC: A61B5/00 ,  G01J9/02 ,  G01N21/17 ,  G01N21/39 ,  G01N21/45

CPC classification number: A61B5/1459 ,  G01N21/171 ,  G01N21/45 ,  G01J2009/0226 ,  G01N2021/1793 ,  G01N2021/451 ,  G01N21/39 ,  G01N2201/084

Abstract: The present invention is directed to a sensor which utilizes an optical fiber interferometer to detect the absorption of a modulated laser beam by a particular chemical species. In particular, one embodiment of the present invention comprises a fiber optic system in which light from a continuously operating laser is modulated prior to passing through a region containing a chemical species of interest. Absorption of the light from the laser causes heating of the chemical species which, in turn, emits thermal energy that is transferred to an optical fiber that is situated in close proximity to the region in which the light is absorbed. In turn, the increase of the temperature of the optical fiber results in a change in the fiber's refractive index, thereby resulting in a change in the transmittance of said interferometer. The change in transmittance of the fiber is converted into an electrical signal in a photodetector. Thereafter, the modulated signal from the photodetector is recovered by phase-sensitive detection, using a lock-in amplifier. In this fashion, the amplitude of the output signal from the amplifier is proportional to the amount of light absorbed by the chemical species of interest. The concentration of this chemical species may thus be determined.

Abstract translation: 本发明涉及一种利用光纤干涉仪来检测特定化学物质对被调制的激光束的吸收的传感器。 特别地，本发明的一个实施例包括光纤系统，其中来自连续操作的激光的光在通过包含感兴趣的化学物质的区域之前被调制。 来自激光的光的吸收导致化学物质的加热，其进而发射热能，其转移到位于光吸收区域附近的光纤。 反过来，光纤的温度升高导致纤维折射率的变化，从而导致所述干涉仪的透射率的变化。 在光检测器中，光纤的透射率的变化被转换为电信号。 此后，使用锁定放大器，通过相敏检测来恢复来自光电检测器的调制信号。 以这种方式，来自放大器的输出信号的幅度与感兴趣的化学物质所吸收的光量成比例。 因此可以确定该化学物质的浓度。

公开(公告)号：US4915500A

公开(公告)日：1990-04-10

申请号：US766168

申请日：1985-08-16

Applicant: Stephen E. Selkowitz

Inventor： Stephen E. Selkowitz

IPC: G01J1/04 ,  G01J1/06

CPC classification number: G01J1/04 ,  G01J1/0425 ,  G01J1/044 ,  G01J1/0266 ,  G01J1/029 ,  G01J2001/0481 ,  G01J2001/068 ,  G01N2201/084

Abstract: A multichannel optical sensing device is disclosed, for measuring the outr sky luminance or illuminance or the luminance or illuminance distribution in a room, comprising a plurality of light receptors, an optical shutter matrix including a plurality of liquid crystal optical shutter elements operable by electrical control signals between light transmitting and light stopping conditions, fiber optic elements connected between the receptors and the shutter elements, a microprocessor based programmable control unit for selectively supplying control signals to the optical shutter elements in a programmable sequence, a photodetector including an optical integrating spherical chamber having an input port for receiving the light from the shutter matrix and at least one detector element in the spherical chamber for producing output signals corresponding to the light, and output units for utilizing the output signals including a storage unit having a control connection to the microprocessor based programmable control unit for storing the output signals under the sequence control of the programmable control unit.

Abstract translation: 公开了一种多通道光学感测装置，用于测量房间中的室外天空亮度或照度或亮度或照度分布，包括多个光接收器，包括可通过电控制操作的多个液晶光学快门元件的光学快门矩阵 在光传输和光停止条件之间的信号，连接在接收器和快门元件之间的光纤元件，基于微处理器的可编程控制单元，用于以可编程序顺序向光学快门元件选择性地提供控制信号;光电检测器，包括光学积分球形腔 具有用于接收来自快门矩阵的光的输入端口和用于产生对应于光的输出信号的球形室中的至少一个检测器元件，以及用于利用包括具有到微处理器的控制连接的存储单元的输出信号的输出单元 基于可编程控制单元，用于在可编程控制单元的序列控制下存储输出信号。

公开(公告)号：US4851665A

公开(公告)日：1989-07-25

申请号：US195406

申请日：1988-05-16

Applicant: Philip V. Pesavento ,  Joy W. Strawbridge

Inventor： Philip V. Pesavento ,  Joy W. Strawbridge

IPC: E21B43/17 ,  E21B43/26 ,  E21B47/02 ,  E21B49/00 ,  G01N21/25 ,  G01N21/85 ,  G02B6/32 ,  G09B23/40 ,  G09B25/02 ,  G12B17/02

CPC classification number: E21B43/17 ,  E21B43/26 ,  E21B47/02 ,  E21B49/006 ,  G01N21/8507 ,  G09B23/40 ,  G09B25/025 ,  G01N2201/084

Abstract: The system for sensing ions in aqueous solution such as an electroplating bath includes a light source (18) which delivers light including a selected wavelength through a series of optical fibers (20, 24, 26, 32) to probe (14). The probe is partially immersed in the solution (12) and the light is delivered through the solution in the space (94) between prisms (82, 92). The return light is conducted by optical fibers (32,38) to detector or opto-electronic transducer (44). A portion of the original light is diverted by splitter (22) through fiber (42) to opto-electronic transducer (46) so that a comparison of the signals determines the amount of light in selected wavelength which is absorbed in the solution due to ions thereon. The signal processing unit (40) is preferably enclosed in an electromagnetic protected area (16) to avoid the adverse EMI and corrosive atmosphere effects near the electroplating tank (10).

Abstract translation: 用于感测诸如电镀浴的水溶液中的离子的系统包括光源（18），其将包括选定波长的光通过一系列光纤（20,24,26,32）传送到探针（14）。 探针被部分地浸入溶液（12）中，并且光通过棱镜（82,92）之间的空间（94）中的溶液被输送。 返回光由光纤（32,38）传送到检测器或光电换能器（44）。 原始光的一部分通过光纤（42）通过光纤（42）转移到光电换能器（46），使得信号的比较确定由于离子而在溶液中吸收的选定波长的光量 上。 信号处理单元（40）优选地包围在电磁保护区域（16）中，以避免电镀槽（10）附近的不利的EMI和腐蚀性气氛的影响。

公开(公告)号：US4782234A

公开(公告)日：1988-11-01

申请号：US737191

申请日：1985-05-23

Applicant: Wayne A. Chudyk ,  Jonathan E. Kenny

Inventor： Wayne A. Chudyk ,  Jonathan E. Kenny

IPC: G01N21/85 ,  G01J1/58

CPC classification number: G01N21/8507 ,  G01N2021/6484 ,  G01N2021/8571 ,  G01N2201/084 ,  G01N2201/0853

Abstract: Subsurface contaminants are readily and inexpensively detected and measured by means of a test head positioned at the subsurface site and forming a protected test chamber for the liquids to be tested. The head encloses the end faces of fiber optic elements which carry radiation to the liquid sample from a test instrument located at the surface and which return radiation from the sample to the instrumentation. A connector positioned at the surface decouples the head from the instrumentation, so that the same instrumentation can service a larger number of test sites.

Abstract translation: 地下污染物通过位于地下位置处的测试头容易且廉价地检测和测量，并形成待测试液体的受保护的测试室。 头部包围光纤元件的端面，其将位于表面的测试仪器携带放射性液体样品并将其从样品返回到仪器。 位于表面的连接器将头部与仪器分离，使得相同的仪器可以服务更多的测试位置。

公开(公告)号：US4755054A

公开(公告)日：1988-07-05

申请号：US861413

申请日：1986-05-07

Applicant: Mark B. Ferree

Inventor： Mark B. Ferree

IPC: G01J3/02 ,  G01J3/12 ,  G01J3/51 ,  G01N21/25 ,  G01N21/47 ,  G02B6/26 ,  G02B26/02

CPC classification number: G01J3/42 ,  G01J3/02 ,  G01J3/0208 ,  G01J3/0213 ,  G01J3/0218 ,  G01J3/0232 ,  G01J3/0256 ,  G01N21/255 ,  G01N21/474 ,  G02B26/02 ,  G02B6/264 ,  G01J2001/4242 ,  G01J2003/1226 ,  G01J2003/2866 ,  G01N2021/4709 ,  G01N2021/4742 ,  G01N2201/0233 ,  G01N2201/084

Abstract: An optical-fiber-based spectrometer utilizes a compact, P-C-board-mountable optical multiplexer which permits multiple channels of reference and measurement data from remote and hostile environments to be analyzed in rapid sequence utilizing synchronized computer data-storage and comparison to give rapid-fire answers to the question of the presence or absence of species of interest in a sample or process being analyzed, the relative light level in the reference and data channels being balanced by an optical attenuator having only an air path, attenuation being effected by controlled misalignment of optical fiber ends.

Abstract translation: 基于光纤的光谱仪使用紧凑的PC板安装光复用器，其允许使用同步的计算机数据存储和比较来快速分析来自远程和敌对环境的多个参考信道和测量数据， 对被分析的样品或过程中存在或不存在感兴趣物质的问题进行回答，参考和数据通道中的相对光级由仅具有空气路径的光衰减器平衡，衰减由受控的未对准 的光纤端。

公开(公告)号：US4719360A

公开(公告)日：1988-01-12

申请号：US838585

申请日：1986-03-11

Applicant: Kazuo Kontani ,  Shinichi Goto

Inventor： Kazuo Kontani ,  Shinichi Goto

IPC: G01N21/53 ,  G01N21/59 ,  G01N15/06

CPC classification number: G01N21/534 ,  G01N2021/178 ,  G01N2021/5969 ,  G01N2201/06113 ,  G01N2201/0833 ,  G01N2201/084

Abstract: Concentration of a smoke emanating from a combustion engine is determined by projecting beams of light on the flow of smoke in directions traversing the flow of smoke, detecting intensities of beams of light which have traversed the flow of smoke with a light receiving device and calculating a cross-sectional image of the flow of smoke based on detection signals issued by the light receiving device.

Abstract translation: 从内燃机发出的烟雾的浓度通过在穿过烟雾流的方向上将烟束的光束投射到烟雾的方向上来确定，通过光接收装置检测已经穿过烟雾流的光束的强度，并计算 基于由光接收装置发出的检测信号的烟雾流的横截面图像。