About Us

After 30 years' rapid growth since the foundation in 1990, CASTECH now is a pioneer and global leader in nonlinear optical crystals, laser crystals, precision optics and laser components for optical communication, biomedical, LiDAR and laser applications.

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.

Based on more than 30 years of worldwide known expertise and unique technologies of crystal growing, precision polishing and high LIDT coating, CASTECH has built a wide selection of high performance precision optics category and solutions including Aspherical/Spherical Lenses, Windows, Mirrors, Prisms, Waveplates, Diffraction Gratings, Polarization Components, as well as featured products for most commanding applications to assist with our customers from prototype to mass production stage.

CASTECH has been recognized throughout the optics industry for its outstanding quality and high reliability which comes from our sustaining rigorous quality control. CASTECH is committed to satisfying the requirements of customers through continual improvement of its quality management system including ISO 9001-Quality Management System, IAFT 16949-Automotive Quality Management System, ISO 14001-Health and Safety Management System, and ISO 45001-Environmental Management Systems.

Here at CASTECH, we value Unity, Diligence, Practicality, and Innovation. Our mission is to be your dependable partner to help you in growth.


Product Showcase

Achromatic Zero-Order Waveplates
Aspherical Lenses
Diffraction Gratings for Telecommunication
High Flatness Optics
Non-Polarizing Beamsplitters
Optical Assembly
Polarizing Beamsplitters
Single Wavelength Waveplates

Press Releases/Promotional Materials



Mailing Address
Building No.9, Zone F, 89 Ruanjian Avenue, Fuzhou, Fujian 350003, China
Fuzhou, Fujian 350003, CN

Sandy Lin
Sales Manager
Rachel Zhang
Sales Manager
Limin Zheng
Sales Engineer