Patent ID: 9733183
Date: 2017-08-15
CPC Classifications: G01N,G02B

Claim:
1. An integrated computational element, comprising: an optical substrate; pluralities of first and second optical thin film layers alternatingly deposited on the optical substrate to form a thin film stack, wherein each first optical thin film layer exhibits a first refractive index and each second optical thin film layer exhibits a second refractive index different than the first refractive index; and at least one additional optical thin film layer arranged in or on the thin film stack and in optical communication with at least one of the first and second optical thin film layers, the at least one additional optical thin film layer exhibiting a third refractive index that is different than the first and second refractive indices, wherein the integrated computational element with the additional optical thin film layer is configured to modify an electromagnetic radiation interacted with a sample substance to have an intensity proportional to a characteristic of the sample substance.