公开(公告)号：EP0604582A4

公开(公告)日：1994-04-28

申请号：EP92920962

申请日：1992-09-17

Applicant: UNIV IOWA STATE RES FOUND INC

Inventor： PORTER MARC D ,  JONES THOMAS P

IPC: G01N21/27 ,  G01J1/16 ,  G01N21/31 ,  G01N21/77 ,  G01N21/80 ,  G01N21/59 ,  G01N21/64 ,  G01N21/78

CPC classification number: G01N21/7703 ,  G01J2001/1636 ,  G01N21/80 ,  G01N2021/3181 ,  G01N2021/772 ,  G01N2201/062 ,  G01N2201/084 ,  G01N2201/0866

Abstract: A dual wavelength optical sensor for measuring the optical characteristics of sensing films which are responsive to a particular quantity to be measured. The optical sensor includes a light source (16, 18) for producing light outputs at two distinct wavelengths and transmitting twin components of light to first and second outputs. A time-shared optical fiber (26) receives the two distinct wavelengths of light from the first output and carries the light on a time-shared basis to a sensor probe (14). A sample detector (30) receives the two distinct wavelengths of light transmitted from the thin sensing film. A reference detector (34) receives the two distinct wavelengths of light from the second output and monitors the output intensity of the light source. A signal processing system (35) combines the measurements of the optical characteristics of the thin sensing film in response to each of the two distinct wavelengths to provide measurements which account for changes in the optical properties of the thin sensing film.

Abstract translation: 一种双波长光学传感器，用于测量响应于待测量的特定量的传感膜的光学特性。 该光学传感器包括用于产生两个不同波长的光输出并将双分量光传输到第一和第二输出端的光源（16,18）。 时间共享光纤（26）接收来自第一输出的两个不同波长的光，并将光以时间共享的方式传送到传感器探头（14）。 样本检测器（30）接收从薄传感膜传输的两个不同波长的光。 参考检测器（34）接收来自第二输出的两个不同波长的光并监测光源的输出强度。 信号处理系统（35）响应于两个不同波长中的每一个将薄传感膜的光学特性的测量值组合起来，以提供解释薄传感膜的光学性质变化的测量值。