What is the principle of ultraviolet reagent detection lamp irradiating COVID-19 antigen detection reagent?

COVID-19 antigen reagent detection kit (fluorescence immunochromatography) introduces fluorescent nanospheres as markers. When fluorescent labels react with antigens or antibodies, antigen-antibody complexes containing labeled fluorescent microspheres can be formed. When using the special UV340 ultraviolet reagent detection lamp, the marker can react with fluorescence and appear on the antigen reagent card.