he BEX-8518, jointly developed by Brolight and Southeast University, received the First Prize in the Self-Made Instrument Competition of the 13th National University Physics Experiment Teaching Symposium. It is a new-generation photoelectric effect system for university physics education.
Traditional experiments rely on mercury lamps and bandpass filters, providing only five discrete wavelengths (365, 405, 436, 546, 577 nm). The BEX-8518 overcomes this using a reflective diffraction grating monochromator and a dual light source system (low-pressure mercury lamp + broadband LED), delivering continuously tunable monochromatic light across the visible spectrum. The mercury lamp enables wavelength calibration, while the LED provides continuous spectral scanning.
All optical components are mounted on a precision optical breadboard with a fully visible optical path, allowing students to observe the complete collimation-dispersion-focusing sequence and eliminating the "black box" approach of traditional monochromators. The system supports both verification and inquiry-based experiments, suitable for general and modern physics lab courses.
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