公开(公告)号：US20180321428A1

公开(公告)日：2018-11-08

申请号：US15511491

申请日：2015-09-09

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION ,  READING UNIVERSITY

Inventor： Timothy Jones ,  Nathan Lawrence ,  Gary Hawkins ,  Richard Sherwood ,  Karim Djotni

IPC: G02B5/28 ,  G01N33/28 ,  G01J3/02

CPC classification number: G02B5/285 ,  G01J3/02 ,  G01N33/2823 ,  G02B5/281

Abstract: A narrow bandpass filter that may be used in a mid-infrared sensor for monitoring a species, which may be a component of a fluid or a solid material. The filter comprises a cavity comprising a low refractive index material. By providing a high ratio of low refractive index material in the filter with respective to high refractive index material, the filter is configured so that wavelength transmission remains constant with varying temperature. Materials used for the low and/or high refractive index provide a temperature invariant filter that transmits mid-infrared spectra without serious degradation.

公开(公告)号：US10451784B2

公开(公告)日：2019-10-22

申请号：US15511491

申请日：2015-09-09

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION ,  READING UNIVERSITY

Inventor： Timothy Jones ,  Nathan Lawrence ,  Gary Hawkins ,  Richard Sherwood ,  Karim Djotni

IPC: G02B5/28 ,  G01N33/28 ,  G01J3/02

Abstract: A narrow bandpass filter that may be used in a mid-infrared sensor for monitoring a species, which may be a component of a fluid or a solid material. The filter comprises a cavity comprising a low refractive index material. By providing a high ratio of low refractive index material in the filter with respective to high refractive index material, the filter is configured so that wavelength transmission remains constant with varying temperature. Materials used for the low and/or high refractive index provide a temperature invariant filter that transmits mid-infrared spectra without serious degradation.