Transmission Diffraction Grating developed by SUNA-opto is specifically designed for key optical communication components such as wavelength selective switches (WSS) and optical filters (ToF). It features high diffraction efficiency and precise control of diffraction angles, enabling high-resolution spectral separation and measurement across a broad spectral range. Key parameters, including wavelength range and incident angle, can be flexibly customized according to customer requirements. The product is also widely applicable to industrial spectroscopy, laser systems, and optical communication, meeting the demands of high-precision beam splitting and spectral analysis.