Abstract: The monochromators used in experimental teaching are generally enclosed and the optical components are fixed, which does not allow students to check the internal structure at any time, nor does it allow students to open the cover for adjustment. Based on the grating monochromator design experiment, a low-cost, repeatedly assembled and disassembled, non-enclosed, and easily adjustable grating monochromator was constructed and used for experimental teaching. Students use the most basic optical components to build a monochromator, then model and trace the optical path with Zemax optical design software, and analyze it by dot charts. In addition, students can choose their own openended exploratory experimental design in the direction of research they are interested in.

Key words: grating, detachable, monochromator, experiment