Aiming at the shortcoming that the structure of laser induced fluorescence detection system is large in volume

high in cost and not conducive to popularization and application

optimize the structure size of optical path based on the principle of confocal optical path structure imaging is proposed

using LED as excitation light source combined with Zemax optical design. While reducing the cost of the system

the design effect of making its structure more compact and smaller is achieved. At the same time

the loss of excitation light energy in the structure is reduced

the signal-to-noise ratio of the system is improved effectively

and the development trend of miniaturization

low cost and portable of point-of-care testing（ POCT） medical instrument is complied with.