The invention discloses a random positioning super-resolution
microscopy method and device based on a
fluorescence-emission kill mechanism. The method includes the following steps: coaxial and common-path exciting light and restraining light are simultaneously focused on a sample; the position on the sample, with the stimulated
fluorescence-emission characteristic, randomly emits
fluorescent light; fluorescent signals are collected to generated a sparse fluorescent distribution image;
diffraction spots are positioned in a unimolecule manner, and the final product is obtained after different
fluorescent light positioning images are synthesized. The device includes a first
laser light source, a second
laser light source, a reflector, a first dichroic mirror, a kohler mirror group, a second dichroic mirror, a microobjective, a sample, an
optical filter, a field lens, an ocular, a
wide field sensing element and a computer. The invention has the advantages that the resolution ratio and
fineness are high, 20 nm crosswise super-resolution images can be obtained; the structure is simple, and the cost is low; irreversible damage of intensive
laser or
fluorescence photobleaching to samples is reduced, and repeating utilization ratio of samples is increased; the function
extensibility is strong.