Side light type fluorescent sensor

The invention discloses a sidelight type fluorescence sensor, and belongs to the technical field of fluorescence device sensing. By arranging the integrally formed sensor shell, packaging the fluorescent sensing unit at the upper part of the sensor shell, packaging the photoelectric system at the lower part of the sensor shell and arranging the excitation light source at one side of the sensor shell, the excitation light source can be coupled to the fluorescent sensing unit from one side of the shell, and under the action of the fluorescent sensing unit, the photoelectric system can emit light to the photoelectric system. Exciting light is emitted from one side where the fluorescent film is prepared, so that side light type excitation sensing is realized; due to the design of the integrated fluorescent sensor shell, the fluorescent sensor is compact in structure, small in size, convenient to carry, convenient to use on a terminal, simple in sensitive unit replacement, good in air tightness and easy to array,