公开(公告)号：US20130070236A1

公开(公告)日：2013-03-21

申请号：US13617478

申请日：2012-09-14

Applicant: A. Keith Hulme ,  John Hammond ,  Nathan Hulme

Inventor： A. Keith Hulme ,  John Hammond ,  Nathan Hulme

IPC: G01N21/59

CPC classification number: G01N21/11 ,  G01N21/274 ,  G01N21/278 ,  G01N2201/0662 ,  G01N2201/1286

Abstract: A for traceably determining an unknown optical path length of a sample in an optical measuring device comprises the steps of: providing a drop analyser connected to a standard spectrophotometer; providing a certified reference material contained in first and second closed high accuracy cuvettes; measuring absorbance of the certified reference material to obtain a first absorbance measurement for the first specified path length; measuring absorbance of the certified reference material for a second path length to obtain a second absorbance measurement; using a dropping device to drop a specified volume of the solvent on an optical surface so that the path length of the specified volume can be determined by reference to the first and second absorbance measurement; and using the dropping device to drop the same volume of sample as the specified volume of solvent on the optical measuring device.

Abstract translation: A，用于在光学测量装置中用于可追溯性地确定样品的未知光程长度包括以下步骤：提供连接到标准分光光度计的液滴分析仪; 提供包含在第一和第二封闭高精度比色杯中的认证参考材料; 测量认证参考材料的吸光度，以获得第一指定路径长度的第一吸光度测量; 测量第二路径长度的认证参考材料的吸光度以获得第二吸光度测量; 使用滴下装置将特定体积的溶剂落在光学表面上，使得可以参照第一和第二吸光度测量来确定指定体积的路径长度; 并且使用滴液装置将相同体积的样品与特定体积的溶剂一起放在光学测量装置上。

公开(公告)号：US5373367A

公开(公告)日：1994-12-13

申请号：US964365

申请日：1992-10-21

Applicant: Richard N. DeGunther ,  Wilbert I. Marsh

Inventor： Richard N. DeGunther ,  Wilbert I. Marsh

IPC: G01N21/53 ,  G01N21/59

CPC classification number: G01N21/538 ,  G01N21/532 ,  G01N2201/0662 ,  G01N2201/127

Abstract: A multiple angle and redundant visibility sensor includes a plurality of optical transmitter/receiver pairs, each pair cooperatively coupled so as to transmit and receive in conically controlled beams along a common optical axis such that each transmitter faces, and directs optical energy directly into, its receiver pair. The plurality of pairs are staggered in angular orientation with respect to each other, with a common volume of intersection through which the approximate center of each optical axis passes. Each transmitter propagates a substantially conical beam of light which passes through an aerosol media which causes molecular scattering of the light. A single transmitter outputs optical energy at any given time, and the receiver intercept the appropriate scattered energy at different scattering angles depending on the relative axial orientation with respect to the scattering volume and the incident radiation. Automatic calibration is effected by measuring the transmission properties through the forward beam, or between cooperating pairs of transmitters and receiver elements. The various scattered energies are then compared to this direct path intensity to obtain the appropriate angular scattering coefficients. Redundant transmit/receive pairs increase the system reliability as well as data validity.

Abstract translation: 多角度和冗余可见度传感器包括多个光发射机/接收机对，每对协作地耦合以沿着公共光轴在锥形受控光束中发射和接收，使得每个发射机面向并将光能直接引导到其中 接收器对。 多个对以相对于彼此的角度取向交错，具有共同体积的交叉点，每个光轴的近似中心通过该交叉点。 每个发射器传播通过气溶胶介质的基本上圆锥形的光束，其导致光的分子散射。 单个发射器在任何给定时间输出光能，并且接收器根据相对于散射体积和入射辐射的相对轴向取向以不同散射角截取适当的散射能。 通过测量通过前向波束的传输特性，或在配对的发射机和接收机元件对之间进行自动校准。 然后将各种散射能量与该直接路径强度进行比较，以获得适当的角散射系数。 冗余的发送/接收对增加了系统的可靠性以及数据的有效性。

公开(公告)号：US5111055A

公开(公告)日：1992-05-05

申请号：US655915

申请日：1991-02-15

Applicant: Henri Fima

Inventor： Henri Fima

IPC: G01L11/02 ,  G01N21/47

CPC classification number: G01N21/47 ,  G01L11/02 ,  G01N2021/4709 ,  G01N2201/0662

Abstract: A method is disclosed for the optical remote measurement of the pressure of the air at a distance by laser excitation in which backscattered radiation is caused by means of a laser generator with very fine spectral line and by excitation of an absorption spectral line of molecular oxygen, the backscattered energies are measured at two different distances, the ratio of these energies is determined, a coefficient of absorption is derived therefrom depending on the temperature and the molecular density of oxygen and the density and so the pressure are calculated. An absorption spectral line is excited belonging to a Schumann-Runge band of molecular oxygen and the absorption spectral line is very wide with respect to the Rayleigh diffusion spectrum.

Abstract translation: 公开了一种通过激光激发远程测量空气压力的方法，其中通过具有非常细的谱线的激光发生器和通过激发分子氧的吸收谱线引起背散射辐射， 在两个不同的距离测量反向散射能量，确定这些能量的比例，根据氧气的温度和分子密度以及密度来计算吸收系数，因此计算压力。 属于Schumann-Runge带的分子氧吸收光谱线被激发，吸收谱线相对于瑞利散射光谱非常宽。

公开(公告)号：USRE33493E

公开(公告)日：1990-12-18

申请号：US189495

申请日：1988-05-02

Applicant: Peter S. Lee ,  Richard F. Majkowski ,  Dale L. Partin

Inventor： Peter S. Lee ,  Richard F. Majkowski ,  Dale L. Partin

IPC: G01N21/39

CPC classification number: G01N21/39 ,  G01N2021/1746 ,  G01N2201/0662

Abstract: Spectroscopic measurements of stable isotopes are performed using a tunable lead salt diode laser. The design of the system is based upon the optimization of isotopic spectral lines from two different path lengths in an absorption cell using a single gaseous sample. A short path cell to measure the more abundant species and a long path cell to measure the less abundant species are used. A micrometer adjustment of a path length is used for equalizing spectral line intensities to obtain a measure of isotope enrichment or of absolute isotopic concentration.

公开(公告)号：US4786171A

公开(公告)日：1988-11-22

申请号：US891273

申请日：1986-07-29

Applicant: David A. LeFebre ,  Roger E. Schirmer

Inventor： David A. LeFebre ,  Roger E. Schirmer

IPC: G01J3/42 ,  G01N21/03 ,  G01N21/31 ,  G01N21/85 ,  G01N21/05

CPC classification number: G01N21/85 ,  G01N2021/036 ,  G01N21/31 ,  G01N21/8507 ,  G01N2201/0662 ,  G01N2201/08

Abstract: Apparatus and method for measuring the absorbance of fluid samples. The length of the light path through the sample is adjusted to optimize the amount of light absorbed by the sample, and the absorbance of the sample is calculated from the length of the path and the amount of light absorbed. Accurate measurement of the absorbance of the fluid may be made by taking measurements at two different path lengths, since light level changes due to fouling of the optical windows or other slow changes in the optical train are independent of the path length, while that of the fluid varies proportionally with the path length. A preferred form of probe includes a cylindrical cell having an exposed variable path length sensing portion at one end and an actuator for varying the spacing at the other end, and a cylindrical cell insertion tube having seals and a large valve mechanism to permit removal of the probe without loss or escape of the fluid being measured.

Abstract translation: 用于测量流体样品吸光度的装置和方法。 调整通过样品的光路的长度以优化样品吸收的光量，并根据路径的长度和吸收的光量计算样品的吸光度。 可以通过以两个不同的路径长度进行测量来精确地测量流体的吸光度，因为由于光学窗口的结垢或光学系列中的其它缓慢变化引起的光级变化与路径长度无关，而 流体与路径长度成比例变化。 探针的优选形式包括：圆柱形电池，其一端具有暴露的可变路径长度检测部分，以及用于改变另一端的间隔的致动器，以及具有密封件的圆柱形电池插入管和允许移除 探头不会流失被测量的流体。

公开(公告)号：US4684805A

公开(公告)日：1987-08-04

申请号：US767742

申请日：1985-08-21

Applicant: Peter Shu-Ti Lee ,  Richard F. Majkowski ,  Dale L. Partin

Inventor： Peter Shu-Ti Lee ,  Richard F. Majkowski ,  Dale L. Partin

IPC: G01N21/39 ,  G01J1/00

CPC classification number: G01N21/39 ,  G01N2021/1746 ,  G01N2201/0662

Abstract: Spectroscopic measurements of stable isotopes are performed using a tunable lead salt diode laser. The design of the system is based upon the optimization of isotopic spectral lines from two different path lengths in an absorption cell using a single gaseous sample. A short path cell to measure the more abundant species and a long path cell to measure the less abundant species are used. A micrometer adjustment of a path length is used for equalizing spectral line intensities to obtain a measure of isotope enrichment or of absolute isotopic concentration.

Abstract translation: 使用可调谐铅盐二极管激光器进行稳定同位素的光谱测​​量。 该系统的设计基于使用单一气体样品在吸收单元中来自两个不同路径长度的同位素谱线的优化。 使用测量更丰富物种的短路细胞和用于测量较少丰度物种的长途径细胞。 使用路径长度的微米调节来均衡光谱线强度，以获得同位素浓缩或绝对同位素浓度的测量。