190–437 nm UV Transmission Grating

The 190–437 nm UV transmission grating is a high-line-density transmission-type diffraction grating designed for UV and near-UV spectral analysis applications.The product uses a fused silica substrate and a surface-relief etched transmission grating structure. Its operating wavelength range covers 190–437 nm, and the grating line density reaches 2421 lines/mm. At a wavelength of 300 nm, the product has a typical angular dispersion of 0.15°/nm, and it provides >40% unpolarized diffraction efficiency across the entire specified operating band. Combined with low polarization dependence, low stray light, low wavefront distortion, and good temperature and environmental stability, it can serve as a core spectral dispersion component in compact UV spectrometers, scientific spectral analysis equipment, and OEM spectral modules.