Monochromator for spectrophotometer

The utility model relates to a monochromator for a spectrophotometer, which comprises an outer light path system and an inner light path system, wherein mounting plates of the outer light path system and the inner light path system are integrally formed and are perpendicular to each other; the internal light path system and the external light path system are combined, the structure of the instrument is greatly simplified, the internal light path system and the external light path system are integrally formed, the reliability and the stability of the structure are greatly improved, part of original devices of the internal light path system and the external light path system can be interchanged for use, the structure is simplified, and the manufacturing cost is reduced. 本实用新型涉及一种用于分光光度计的单色器，外光路系统与内光路系统，所述外光路系统与内光路系统的安装板一体成型，且相互垂直；本实用新型结合了内光路系统与外光路系统，大大简化了仪器的结构，内光路系统与外光路系统一体成型，大大提高了结构的可靠性与稳定性，且内光路系统与外光路系统的部分原器件可互换使用，简化了其结构，也降低了制造成本。