Image Number 16 for United States Patent #8120777.
This invention provides an interferometric detection device configured to maintain a temperature of a sensing area to within 20 m.degree. C. of a first target temperature and to maintain a temperature of the medium within 500 m.degree. C. of a second target temperature The device can do so under conditions in which ambient temperature changes from 0.1.degree. C. to 5.degree. C. over 5 minutes.