The L3001 falling light fluorescence microscope adopts an excellent infinite distance optical system and modular functional design concept, which can provide excellent optical quality and operational performance. It is equipped with an infinite distance flat field achromatic fluorescence objective lens and a large field eyepiece without magnification chromatic aberration. The optical system produces clear and bright images with a wide field of view. Ideal design that meets ergonomic requirements, using a low position focusing handwheel and an inward facing objective lens converter to make the operation process more comfortable and easy. Fluorescence microscopy and transmission bright field observation can be performed Suitable for fields such as biopharmaceuticals, medical testing, and disease prevention.