Dual-color fluorescence emission difference super-resolution microscopy

To perform super-resolution imaging of different tissue structures of biological samples using fluorescence radiation differential microscopy simultaneously, a dual-color FED microscopy system is studied in this paper. The basic principle of the FED is to remove the confocal microscopy image obtained by scanning the solid spot from the confocal microscopy image obtained by scanning the hollow spot to obtain a super-resolution microscopy image. Based on the study of the monochromatic FED microscopy system, a feasible dual-color FED microscopy imaging system is proposed and imaging experiments are performed on fluorescent particles in this paper. The experimental results indicate that under excitation light of 488nm and 640nm, the system realizes spatial resolution of 135 nm and 160 nm of the fluorescent particles respectively. In addition, this system can also perform multi-color super-resolution microscopy imaging simultaneously on different tissues of biological samples, which meets the requirements of practical applications.