Customized core components: Utilizing ion-etched original grating customized by the Dongyi Optoelectronics Research Institute according to customer requirements. Integral slit: Using a special material integral slit optical system design, the system has superior long-term stability, with an instrument wavelength range of 140 – 750nm, capable of accurately detecting a variety of elements. The grating focal length is 750mm, paired with a holographic concave original grating, with 2400 lines/mm, and a dispersion rate of first-class spectrum 0.055nm/mm.