Optical Devices  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.

GRT(Beijing Guangruntong Technology Development Co., Ltd.) is headquartered in Beijing Zhongguancun Hi-Tech Park and began in April 2008. GRT has gathered a group of senior R&D personnel with an average age of more than 15 years. Under the background of the rapid development of the optical fiber industry and the optical fiber to households, GRT has always adhered to the strategic principles of quality and innovation, and has gradually grown into a high-tech fiber optic company that is currently well-known in China, which integrates R&D, production and marketing, and has its own intellectual property and its own brand.
The main products of GRT are Optical Fiber Network Cards, Optical Fiber Modules, WDM devices, Optical Converter, Optical Fiber Patch Cord, and Optical Splitter. All kinds of products have passed international certification such as FCC, CE, and ROHS, as well as national industry certification, and have won a number of scientific and technological progress awards and excellent product awards. On the road ahead, GRT is committed to building China's own national enterprises, achieving the goals of "Optics Links The World, Connects Us Togetcher".

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"!

Beijing High-precision Technology CO., Ltd is a high-tech enterprise focusing on the development and manufacturing of precision/ultra-precision products. Based on nanometre-scale manufacturing and processing technology, we support the national high-technology strategic blueprint with core technology. We also serve the national high-end manufacturing industry with micron-/nanometer-scale manufacturing system and provide the vertical market with support and systematic solution to improve its core competence.
       Based on Theory, Solve with Collaboration, Breakthrough Technology, and Tested by Customers as our mission, Atoman launched research on the mass production technology on critical functional components and precision/ultra-precision special equipment to meet the mass production need of national and international markets on precision/ultra-precision processing machine tool. These include research on the critical functional components, the critical technology of high-stability drive control and systematic research focusing on the design of the structure, optimization of the manufacturing process, and manufacturing techniques of critical functional components processing units. These researches support the demand for precision/ultra-precision processing equipment market with critical functional components, develop a complete manufacturing chain to meet the need of specific customers, solve the problem of technology gap of precision/ultra-precision products in China and improve the competence and creativity of advanced technology in China.
         Bearing the expectation of generations of technology talents in the filed of nano-manufacturing, precision optics, ultra-precision equipment research and design, Atoman integrate relevant resource from different levels and deepness home and abroad and target on building the most competitive nanometer-scale technology research and processing manufacturing platform with the most integrated technology system in China.

Vision & Control opens direct access to the fascinating possibilities of machine vision - creating machine vision.

Our mission:

We make machines see and thus make hidden things visible. Our products control production systems in such a way that rejects and complaints are avoided - and thus production can be carried out cost-effectively and efficiently. We enable precision in the µm range 24 hours a day, 7 days a week.
Take advantage of your benefits:
Improve plant efficiency
Our vision solutions promise the highest quality, reliability and precision for improved plant efficiency and work accuracy.
Achieve a cost advantage
For many applications, we already have everything at hand. You can conveniently choose from an extensive range of standard products and thus - modularly and flexibly - put together your own individual solution. This reduces your own development costs.
Strengthening innovative power
We have been developing image processing systems "made in Germany" for over 25 years. With a research, development and manufacturing competence that constantly redefines the limits of what is possible in our industry. Benefit from our know-how.
Expanding competence
We are always at your side as a competent partner for practical questions. With an all-round carefree package from development and consulting to commissioning and support, as well as a wide range of consulting and training services: feasibility analyses, solution workshops, training courses and seminars.