Changchun Hengyi Optics Co., Ltd. is a manufacturer, trading company, and wholesaler based in Changchun, Jilin, China, specializing in high-quality optical components. Established in 1996, the company has grown to employ over 1000 people and operates a factory with 9 production lines. They are a leading photonics designer and integrated manufacturing company, with technical strength originating from the Changchun Institute of Optics & Fine Mechanics and Physics under the Chinese Academy of Science. Changchun Hengyi Optics Co., Ltd. offers a comprehensive range of optical elements, including optical prisms (such as periscope, wedge, corner cube, and right-angle prisms), optical lenses (cylindrical, spherical, and parabolic), optical filters, optical mirrors, optical windows, beamsplitters, polarizers, diffraction gratings, optical crystals (including calcium fluoride and silicon wafer), and phase retarders. These products are designed for various industries, including transportation equipment and railway construction, and are manufactured to European Quality Standards, with capabilities for surface quality 10-5 scratches and digs, and fringes 1/10-1/20 lambda or better. The company provides OEM and contract manufacturing services, with an export percentage ranging from 41% to 50% and a long history of international trade. They hold ISO 9001 and ISO10012 certifications, ensuring high product quality. They also offer manufacturing of special products according to customer requirements.