Schlumberger Technology Corporation

University of Reading

Richard Sherwood

Nathan Scott Lawrence

Timothy Gareth Jones

Gary Hawkins

Karim Djotni

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.

Growing community of inventors

Reading, United Kingdom

Richard Sherwood