Abstract: A freeform imaging system with a spectrometer and telescope components optically connected and optimized to increase the spectral and spatial resolution capabilities. Many embodiments of the system are capable of producing a spectral resolution of approximately 1 nm and a spatial resolution less than 30 m such that the imaging system can be used to accurately capture and measure point source plumes of various atmospheric gases including CH4, CO2, CO, N2O, and H2O.

Abstract: A freeform imaging system with a spectrometer and telescope components optically connected and optimized to increase the spectral and spatial resolution capabilities. Many embodiments of the system are capable of producing a spectral resolution of approximately 1 nm and a spatial resolution less than 30m such that the imaging system can be used to accurately capture and measure point source plumes of various atmospheric gases including CH4, CO2, CO, N2O, and H2O.

Abstract: A method for fabricating an optical diffraction element or grating, where the spectral response of phase gratings is substantially optimized by introducing structure into the grating groove profile. Spectral range of the grating is extended when compared to conventional blazed gratings.

Abstract: A fibre optic magnetic sensor is disclosed. The sensor has a thin-walled cylindrical barrel with a mid-section which is elastically radially deformable. A single mode optical fibre is wound about the mid section of the barrel. A magnetostrictive element is located within the center of the barrel and secured to both ends of the barrel. Changes in the external magnetic field in the vicinity of the sensor cause changes in the length of the magnetostrictive element and consequently cause axial forces to be applied to the end of the barrel. The mid-portion of the barrel deforms radially, thus inducing a strain in the optical fibre from which the external magnetic field strength may be deduced.