Our Rowland circle concave grating for, flat field holographic grating, Seya Namioka Flat Field Concave Holographic Grating 1200l mm 200nm 800nm is exquisite, concise and concise in workmanship, and all of its parts are carefully selected to ensure high-quality standards. Our optical spectroscopy imaging component not only have a good reputation in China, but also are exported to many countries and regions. The company has strong R&D strength and strong innovation ability, providing a better development platform for all employees. We have communicated and cooperated with our partners for a long time and won a wide range of markets. We always pay attention to the needs and development of our employees, adhere to the people-oriented management concept, and fully mobilize the enthusiasm, initiative and creativity of our talents. We offer a wide range of value-added services to enhance our customers' experience. We have been focused and persistent, so that our products and services continue to improve. We are dedicated to creating a positive work culture that fosters creativity, innovation, and growth.