Device and method for optically measuring the char

专利名称：Device and method for optically measuring

the characteristics of a substance utilizingthree wavelengths of light

发明人：Robert Delignieres,Christian Durand申请号：US08/307782申请日：19950127公开号：US05680220A公开日：19971021

摘要：A first embodiment of the invention includes a light source (1) lighting twoparallel optical branches (b1, b2) controlled respectively by two optical shutters (4, 6),one comprising a transparent cell (3) containing a substance to be studied, and the otherbeing used to divert the light from the source. The light coming successively from oneand from the other branch is applied selectively to three color filters (F1- F3) filteringthree wavelengths selected according to the substance to be studied. The successiveluminous intensities which have crossed each of the filters are measured through threedetectors (D1 to D3) and the measurings are combined by means of a control (0).Analogous measuring sequences may be achieved with an embodiment comprising threelight sources and a single detector. The device can be used for determination of the pHvalue of a substance.

申请人：INSTITUT FRANCAIS DU PETROLE

代理机构：Antonelli, Terry, Stout & Kraus, LLP

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