Irregular-Shaped Calibration Target

The alien calibration board (asymmetric circular grid calibration board) is a high-precision visual calibration tool that combines the advantages of both checkerboard and ordinary circular grid calibration boards. It is one of the three mainstream calibration boards supported by OpenCV.

Product Features: Non-planar visual system calibration, multi-view camera calibration, and calibration for irregular shapes such as circles, polygons, and arcs；It exhibits strong resistance to light interference and demonstrates excellent performance in feature point localization accuracy, making it suitable for high-precision calibration scenarios.
Customizable special shapes and patterns can meet the calibration needs of special imaging systems that cannot be adapted by conventional calibration boards.

Applicable scenarios: Machine vision calibration (in fields such as medical, robotics, aerospace, etc.)

Dongguan Dafan Optical Technology Co., Ltd.(DFOPTIX) was founded in 2018, its headquarters located in Dongguan City, Guangdong Province, China. DFOPIX is a system-level calibration solutions service provider with engineering culture as its cornerstone and technological innovation as its core.

Currently, DFOPTIX has nearly 150 employees, with R&D personnel consistently accounting for over 30% of the workforce each year — a professional team combining deep engineering expertise with sustained innovation capability.

DFOPTIX has established an advanced R&D and manufacturing base spanning nearly 20,000 square meters, equipped with high-standard precision workshops such as class-100 lithography workshop and class-1000 vacuum lamination workshop, as well as various well-equipped professional laboratories. It has also introduced internationally advanced manufacturing and testing equipment, systematically establishing an industry-leading R&D and manufacturing system.

DFOPTIX specializes in the R&D and manufacturing of a full category of calibration products — including integrated light-source calibration targets and LiDAR calibration boards, while also providing customized calibration product services tailored to customers’ requirements. To date, our company's products and solutions have been widely deployed across sectors including medical, semiconductor, robotics, consumer electronics, intelligent vehicles, aerospace, 3D scanning, and industrial automation. DFOPTIX has served over 3,000 clients, including several Fortune 500 companies.