Systems for Detecting a Chemical Species and Use Thereof

A method of detecting at least one chemical species comprising:

• splitting a beam of electromagnetic radiation into at least a first electromagnetic radiation beam and a second electromagnetic radiation beam;
• passing at least a portion of the first electromagnetic radiation beam through a first bandpass filter, wherein the first bandpass filter is configured to receive the first electromagnetic radiation beam and transmit a filtered first electromagnetic radiation beam, the first bandpass filter transmits at least 50% of the first electromagnetic radiation beam passing through a first transmittance window, the first transmittance window having a first width including a first electromagnetic radiation wavelength range corresponding to at least a portion of a wavelength range of absorption or emission by the at least one chemical species to be detected;
• passing at least a portion of the second electromagnetic radiation beam through a second bandpass filter, wherein the second bandpass filter is configured to receive the second electromagnetic radiation beam and transmit a filtered second electromagnetic radiation beam, and wherein the second bandpass filter includes a second transmittance window having a second width within a second electromagnetic radiation wavelength range, the second transmittance window having an upper limit wavelength value that is greater than an upper limit wavelength value of the first transmittance window, and wherein the second bandpass filter transmits a lesser percentage of the second electromagnetic radiation beam passing through the second transmittance window than the first bandpass filter transmits of the first electromagnetic radiation beam passing through the first transmittance window;
• receiving at least a portion of the filtered first electromagnetic radiation beam with a first electromagnetic radiation detector;
• receiving at least a portion of the filtered second electromagnetic radiation beam with a second electromagnetic radiation detector;
• generating at least one image of the filtered first electromagnetic radiation beam detected by the first electromagnetic radiation detector and at least one image of the filtered second electromagnetic radiation beam detected by the second electromagnetic radiation detector;
• and
• determining the presence of the at least one chemical species based, at least in part, on the images.