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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.

Jiangxi Phenix Optical Technology Co., Ltd. is the first listed company in the Chinese optical industry (SSE code: 600071), which was successfully listed on the Shanghai Stock Exchange in 1997. It covers an area of about 333,000㎡ and employs about 3300 people.Today, Phenix Optics is a leading and internationally professional company, that takes optical precision manufacture as its foundation and centers on photoelectric R&D technology.Phenix Instrument Business Union devotes itself to researching and manufacturing biological microscopes, stereo microscopes, fluorescence microscopes, metallurgical microscopes, digital microscopes, digital interactive labs, and related products. Our products are welcomed all over the world. We have exported to Europe, America, Asia, the Middle East, etc.

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"!

DISTRIBUTOR for scales, microscopes, metrology ...

• Electronic scales (pocket scales, school scales, precision scales, analytical balances, bench scales, stainless steel scales, price-calculating scales, counting scales, platform scales, hanging scales ...)
• Optical instruments (microscopes, refractometers, magnifying glasses, reading glasses ...)
• Material testing (moisture analyzer, length measurement, gold & gemstone test, force measurement, torque measurement, coating thickness measurement, wall thickness measurement, hardness tester, ultrasonic cleaner ...)
• Medical technology (baby scales, personal scales, body fat / obesity scales, stool / wheelchair scales, manual force gauges, size measuring rods ...)
• LED lights / lamps
• Occupational safety and environment
• Card holders, Jojos, Lanyards and Accessories

and much more

„DIOPTIC sees itself as a think-tank for optical technologies and developer of tailor-made optical systems, special optics and high-performance infrared lenses. We are market leaders in computer-generated holograms for aspheric testing and for laser beam shaping, and we support every client with customized advice based on our deep expertise in these fields." Jean-Michel Asfour