Method and system for analysing a chemical composition of a target using a Fabry-Perot interferometer

A system for analyzing a chemical composition of a target, the system comprising:

• a computing device,
• only a single electrically tunable Fabry-Perot interferometer which is configured to be placed in a path of radiation emitted by only a single radiation source, wherein the radiation source is configured to provide optical inputs with a bandwidth of more than one free spectral range of the Fabry-Perot interferometer, wherein the Fabry-Perot interferometer is placed in the path of radiation prior to the target,
• a detector for detecting the radiation, which has passed the Fabry-Perot interferometer simultaneously via multiple resonance peaks of different orders and which has passed or was reflected by the target, and wherein the detector is configured to detect the radiation such that multiple pass bands are allowed to be detected simultaneously, wherein the detector comprises only one pixel for detecting radiation,
• wherein the system is configured to scan with varying air gaps of the Fabry-Perot interferometer to produce a continuous spectrum for the target, and
• the system comprises a memory for storing reference data of at least one known reference substance and the computing device is configured to analyze mixed signals of multiple resonance peaks of different orders by comparing detected radiation data with the stored reference data.