Patent ID: 9404771
Filing Date: 2016-08-02
CPC Classification: G01D,G01K,G01L,G02B

Claim Text:
1. An optical sensor comprising: an optical cavity defined by a dielectric body and responsive to one or more physical environmental conditions; a waveguide having a terminal end spaced apart from the optical cavity such that light is optically coupled from the terminal end of the waveguide to the optical cavity; and a collimator for collimating the light emitted from the waveguide; a spacer extending between the dielectric body at a proximal end of the spacer and towards the terminal end of the waveguide; the spacer arranged such that the distance between the terminal end of the waveguide and the optical cavity is sufficient such that, in use, the waveguide is maintained at a first temperature that would not damage the mechanical or optical properties of the waveguide, and the dielectric body is maintained at a second temperature, higher than the first temperature, that would be sufficient to damage the mechanical or optical properties of the waveguide; and an interrogator coupled to the waveguide and arranged to detect changes in the properties of the optical cavity.