Large Sized Checkerboard And Dot Composite Calibration Plate

The Large-Sized Checkerboard And Dot Composite Calibration Plate

The large-sized checkerboard and dot composite calibration plate is a high-precision optical reference tool that combines the advantages of both calibration plates, suitable for multi-sensor calibration needs in large fields of view and complex working conditions.

1. Core Features
(1) Composite pattern design: Integrating both checkerboard corner and dot array features, it retains the advantages of high sub-pixel detection accuracy of checkerboard corner and native compatibility with OpenCV/Halcon platforms, as well as the anti defocusing, anti light interference, and stable 360 ° rotation recognition of dot calibration boards. Some models also have built-in global encoding identifiers, which can still complete pose calculation when partially occluded.
(2) Large size specifications: Conventional single block sizes can cover over 300 × 300mm, with a maximum of 3m × 5m integrated molding. It supports splicing to achieve a super large field of view coverage of over 10m, fully suitable for large field of view calibration scenarios such as autonomous driving, storage robots, and aerial remote sensing.
(3) Substrate and Process: Multiple substrates such as glass, metal, and carbon fiber composite materials can be selected, with a thermal expansion coefficient as low as 2-5 × 10 ⁻⁶/℃, a typical processing accuracy of ± 15-30 μ m, a matte low reflectivity treatment on the surface, an optical contrast ratio of ≥ 100:1, and stable feature point extraction even in strong light environments.
2, Mainstream application scenarios
Automated vehicle mass production line: Quickly adapt to the joint calibration of surround view cameras, front view cameras, and LiDAR for different vehicle models. The calibration time for a single vehicle can be controlled within 5 minutes, greatly improving the efficiency of the production line.
Large field of view visual inspection: Large format scanning equipment, multi camera global stitching calibration, solves the problem of insufficient accuracy that conventional small-sized calibration boards cannot cover large fields of view.
Field testing and after-sales maintenance: Equipped with a movable industrial grade aluminum profile bracket, the bottom has a pulley locking structure, supports 360 ° horizontal rotation, ± 90 ° pitch adjustment, and can be quickly deployed by a single person, suitable for dynamic calibration needs in multiple field scenarios.

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.