Hydrogen sulfide imaging system

An infrared (IR) imaging system for imaging a scene, the imaging system comprising:

• an optical system comprising an optical focal plane array (FPA) unit and a plurality of spectrally different optical channels to transfer IR radiation from the scene towards the optical FPA unit to form a plurality of images of the scene thereon, each optical channel of the plurality of spectrally different optical channels positioned to transfer a portion of the IR radiation incident on the optical system from the scene towards the optical FPA unit to form a two-dimensional (2D) image on a corresponding portion of the optical FPA unit, wherein the plurality of spectrally different optical channels are coupled to or integrally formed with the optical FPA unit,
• wherein at least one of the plurality of optical channels is in the short-wavelength infrared (SWIR) spectral range,
• wherein the imaging system is configured to acquire a first video image of the scene in the short-wavelength infrared spectral range, and
• wherein the at least one of the optical channels selectively passes light having a wavelength in a band of IR wavelengths in a range of 1585 nm to 1595 nm while attenuating light at wavelengths above 1600 nm and below 1580 nm.

An infrared (IR) imaging system for detecting hydrogen sulfide (H2S) gas, the imaging system comprising:

• an optical system comprising an optical detector array comprising a two-dimensional imaging sensor and one or more optical channels that transfer infrared radiation to the optical detector array, the one or more optical channels comprising an optical filter, wherein, within a band of IR wavelengths, a convolution of the optical filter with an absorption spectrum of H2S gas is greater than a convolution of the optical filter with an absorption spectrum of carbon dioxide (CO2), or methane (CH4), or sulfur dioxide (SO2), or water (H2O);
• and
• processing electronics configured to process image data received by the optical detector array, the processing electronics configured to detect H2S gas based on the captured image data,
• wherein the optical filter selectively passes light having a wavelength in a band of IR wavelengths in a range of 1585 nm to 1595 nm while attenuating light at wavelengths above 1600 nm and below 1580 nm.