CDHC, based in Beijing, China, is a technical company specialized in optics. Its main business includes design and manufacture of optical components, modules, sub-systems assemblies and systems. Wealthy experiences in engineering and production, and service flexibility have been meeting our customer demands since 1987. Our company has grown steadily, up to now 150 people employed. Lead by an experienced technical team, most employees are skilled technicians for professionally dealing on fine optics, fine mechanics and special tools. Qualified technical department inspects our products at 100% level for quality control.