公开(公告)号：US4688943A

公开(公告)日：1987-08-25

申请号：US848815

申请日：1986-04-07

Applicant: Dariush Modarress

Inventor： Dariush Modarress

IPC: G01N21/53 ,  G01N21/01 ,  G01N21/59

CPC classification number: G01N21/534 ,  G01N2201/066

Abstract: An apparatus and method for determining the extinction of laser light through a fluid is disclosed. The fluid is passed in a conduit having a light transmissive window. A laser beam having intensity I.sub.1 is passed through the window into the fluid. A prong shaped probe having first and second probe sections is disposed in the fluid flow. The first probe section includes a beamsplitter at a distance d.sub.1 from the window for redirecting a portion of the beam onto a first photodiode array, to determine the beam intensity I.sub.2. The remaining portion of the beam tranverses a distance d.sub.2 and is directed through a prism onto a second photodiode array to determine its intensity I.sub.3. Based on the intensities I.sub.1, I.sub.2 and I.sub.3 and given d.sub.1 and d.sub.2, the extinction values E.sub.1 and E.sub.2 may be calculated. Fluid optical density may then be determined as a function of the extinction.

Abstract translation: 公开了一种用于确定通过流体的激光消光的装置和方法。 流体在具有透光窗的导管中通过。 具有强度I1的激光束通过窗口进入流体。 具有第一和第二探针部分的叉形探针设置在流体流中。 第一探测部分包括与窗口距离d1的分束器，用于将光束的一部分重定向到第一光电二极管阵列上，以确定光束强度I2。 光束的剩余部分转换距离为d2，并通过棱镜被引导到第二光电二极管阵列上以确定其强度I3。 基于强度I1，I2和I3，给定d1和d2，可以计算消光值E1和E2。 然后可以将流体光密度确定为消光的函数。