The Fabry-Pérot interferometer is a significant instrument in optics, consisting of a transparent plate with two reflective surfaces or two parallel highly reflective mirrors. It is commonly used in telecommunications, laser technology, and spectroscopy to control and measure the wavelengths of light. The transmission of the interferometer displays a spectrum with peaks corresponding to the resonances of the etalon. This technology is known not only for its precision but also for its application in dichroic filters, which are made up of thin, sequential arrays of Fabry-Pérot interferometers. The development of new manufacturing techniques has enabled the production of highly precise, adjustable Fabry-Pérot interferometers that are important in various scientific and industrial applications.