Optrontec

Optrontec makes optical filters and related optical components, precision parts that control how light passes through cameras, sensors, and displays.

Its products serve industries such as semiconductors, displays, medical devices, autonomous vehicles, aerospace, and defence. The company is listed on KOSDAQ, South Korea's tech-focused small-cap exchange. Its business spans optical lenses, sensors, optical elements, and optical systems, with the product mix extending toward optoelectronic integration and precision sensing.