This invention discloses an external
fluorescence system and its usage method for a high-
magnification stereomicroscope, relating to the field of
microscopy technology. It includes a
light source module, a
light source transmission component, a
light source collimation and focusing
system, a filter switching module, a multi-dimensional adjustment bracket, and a
microscope connection part. One end of the light source transmission component is connected to the light source module, and the other end is connected to the light source collimation and focusing
system. The light source collimation and focusing system is used to focus the excitation light emitted by the light source module into a very small
light spot. The filter switching module is positioned in the
optical path between the light source transmission component and the light source collimation and focusing system. The multi-dimensional adjustment bracket is connected to the light source collimation and focusing system. The light source module uses low-loss liquid
fiber transmission, which, in conjunction with the light source collimation and focusing system, compresses the
light spot to match the objective lens, effectively compensating for brightness loss. Through the axial fine-tuning of the multi-dimensional adjustment bracket and the light source adjustment device, precise overlap between the external
light spot and the original light spot is ensured, improving imaging uniformity.