Photo Articles  Manufacturers, Traders, Suppliers

After more than 30 years' rapid growth since the foundation in 1990, CASTECH INC. has become a recognized leading supplier of crystals, optics and laser components in the world. In 2008 CASTECH successfully completed IPO in Shenzhen stock exchange. (Stock Code 002222) Today, at our 450,000 sq ft advanced facility, over 1000 employees are dedicating to satisfy customer needs in terms of performance and cost effectiveness.
Crystals for Laser and Telecom Application:
With more than thirty years' untiring effort, CASTECH has developed flux, Czochralski, water solution and Bridgman-Stockbarger crystal growing technology, now is a worldwide leading supplier with largest mass production lines in the world for LBO, BBO, Nd:YVO4 and KTP. In addition, we also provide CLBO, BiBO, KDP, KD*P, Yb:CALGO, Yb:KGW, Ti: Sapphire, TGG, TSAG, α-BBO and other crystals for laser and telecom industries.

Zhejiang Crystal Optoelectronic Technology Co., Ltd. (COT) was founded on August 2, 2002 and listed on the Shenzhen Stock Exchange on September 19, 2008 (stock code 002273). In 2022, total revenue reached 43.76 billion yuan, with year-on-year growth of 14.86%, and the net profit climbed up to 5.95 billion yuan.
Over the past twenty years, COT has been a global optical expert in the field of information transaction, providing one-stop professional services from core components up to modules and solutions. At present, the company is involved in R&D and manufacturing process in five major industrial sectors, and its products include Optic Components, Thin-film Optics, Semiconductor Optics, Automotive Electronics & AR+, Reflective Materials, etc. The company has more than ten wholly-owned and controlling subsidiaries, and participates in multiple enterprises such as Japan Guangchi Co., Ltd., Ningbo Jishi Investment, Wuhan Wuyi Yuntong, Jingbang Optics, and Zhaoge Digital.
Our products span from Consumer Electronics, to Automotive Electronics and Metaverse. For Consumer Electronics, products such as Infra-Red Cut Filter (IRCF), Camera Cover Glass (CG), Narrow Band Pass Filter (NBPF) help COT to rank among the world's top producers and sellers. Our core competitiveness lies in its leading global technology integration ability to combine "Thin Film Design, Micro Nano Optic Techonology, Optic Cold Forming, and large-scale Automation" together. For Automotive Electronics, Head Up Display (HUD), Car Cams, and LiDAR window glasses have all been applied to the products and services of globally renowned vehicle manufacturers. For Metaverse, AI and display technology have developed rapidly in past few years, and COT has laid out a full technology path in the AR field to help incubate technology giants in mass production. In addition, the reflective materials produced by Zhejiang Yeshili, a wholly-owned subsidiary of Crystal Optech, have maintained a leading technological position in China for many years.
Looking into the future, with diversified application of Optics across different fields, the global optical industry has ushered in a golden opportunity. Crystal Optech will adhere to the guiding principle of "globalization, technology-oriented, and open cooperation", uphold the business philosophy of "be noble in life, be excellent in work", shoulder the mission of "innovation makes optics stronger, optics makes the world a better", and strive to "become an outstanding one-stop optical expert in the world"!

AVIC JONHON OPTRONIC TECHNOLOGY CO., LTD. held by Aviation Industry Group of China, is the largest provider of interconnection solutions in military defense & high-end manufacture fields in China. JONHON is based in Luoyang and sets up sub-companies and subsidiaries in Xi’an, Shenzhen, Shenyang, Dongguan, Qingdao. In 2007, JONHON was listed in Shenzhen Stock and the stock code is 002179.
Having National R&D Center, Postdoctoral Research Center, and Test Center, JONHON specialized in R&D of optical, electrical, fluid technology and equipments, developing over 300 series and 250000 kinds of connectors. By the end of 2015, JONHON has obtained over 2000 patents, drafted and established over 200 occupation standards, gained the certifications including AS9100, ISO9001(2000), TS16949, ISO14001, OHSAS18001 and many key products past UL, CUL, CE, TUV, CB, etc.
Products are widely used in aviation, aerospace and military field, communication and data center field, railway transportation field, new energy vehicle field, power equipments, petroleum equipments, medical equipments, and other civil high-end manufacturing field, which are exported to more than 30 countries and regions including European countries, the United States, Israel, Australia, Korea, India and etc.
Practicing the purpose of “Contribute to Nation with Aviation Industry, Strengthen the Military Forces and Enrich the People” and implementing the corporate core culture of “honesty and virtue”, JONHON efforts to be the global leading provider of interconnection solutions.

Technical development in electromechanical field; Manufacturing and sales of mechanical and electrical products; Technology transfer, consultation and service in mechanical and electrical field. To be engaged in the export business of the products and technologies produced by the enterprise and the import business of the machinery, equipment, spare parts, raw and auxiliary materials and technologies required by the enterprise, with the exception of the commodities and technologies the company is restricted by the state to operate or prohibited from importing and exporting. (Projects subject to approval in accordance with the law may not be operated until they have been approved by the relevant departments.)