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 and is headquartered in Dongguan, Guangdong Province, China. DFOPTIX is a system-level calibration solutions service provider, driven by an engineering-centric culture and a core focus on technological innovation.

Currently, DFOPTIX has over 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 and a capacity for continuous innovation, ensuring robust technical support for high-precision calibration services.

Driven by technology and continuous innovation, DFOPTIX is committed to advancing industrial innovation.The company has established a state-of-the-art 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.DFOPTIX has also introduced internationally advanced manufacturing and testing equipment, systematically establishing an industry-leading R&D and manufacturing system.

DFOPTIX is a National High-Tech Enterprise,specializing in high-precision calibration, it focuses on the R&D and manufacturing of a comprehensive range of calibration products, such as integrated light-source calibration targets and radar calibration targets. The Company provides customers with customized calibration products, software and algorithm support, and full-scenario calibration solutions. Its products and solutions are widely applied across sectors including medical technology, semiconductors, robotics, consumer electronics, intelligent automotive, aerospace, 3D scanning, and industrial automation.

After years of rapid growth and technological development, DFOPTIX has emerged as a leading provider of system-level calibration solutions, serving more than 3,000 corporate customers worldwide, including multiple Fortune 500 companies.

Looking ahead, DFOPTIX will continue to uphold its core values of “Precision as the Foundation, Technological Innovation, Pursuit of Excellence, and Mutual Success.” The company will further advance technological innovation, continuously enhance its calibration technologies, and expand its software and algorithm ecosystem. By delivering increasingly precise, reliable, and systematic calibration solutions, DFOPTIX aims to forge lasting partnerships and work together with industry partners to shape the future of the industry.