Dongguan Dafan Optical Technology Co., Ltd.
System-Level Calibration Solution Provider
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DM Code Calibration Board
The QR Code Calibration Board is designed for high-precision camera and vision system calibration, supporting both intrinsic and extrinsic parameter adjustment. By integrating QR codes with unique IDs, it enables robust and accurate feature point detection, even in complex environments. The board ensures reliable distortion correction and coordinate system alignment, making it suitable for multi-camera setups or camera-to-robot calibration. Available in various sizes and made with durable materials, it is widely used in industrial automation, 3D reconstruction, and precision measurement. Compatible with Hikvision cameras, SDKs, and common vision libraries, it provides stable and efficient calibration solutions.
Product Features: Micron-level high precision, high contrast, non-reflective, clear and easy to identify, High precision (with a maximum accuracy of 1um),supports multi-format drawing customization
Applicable scenarios: Machine vision calibration (security, film and television, medical, camera, drone camera, photography studio, scientific research instruments, and other equipment)
Substrate: The substrate for the QR code calibration plate is optional, and different substrates (such as glass, ceramic, aluminum plate, etc.) can be customized according to different usage scenarios, environments, and accuracy requirements.
Glass substrate parameters:
| Design |
Substrate |
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Manufacturing Process |
Photolithography |
Glass substrate |
Quartz glass (fused silica)/soda glass |
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Minimum line width |
1µm / 0.55µm |
Transmittance rate(@550nm) |
>95% |
|
Feature accuracy |
±1µm |
Coefficient of thermal expansion (20-200°C) |
<5.0×10⁻⁷/K |
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Coating |
Yellow chromium, bright chromium , blue chromium (low reflectivity) |
Expansion ratio(20-200°C) |
0.00006% (0.6µm/°C of 1m) |
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Reflectance |
< 13.4% @550nm |
Surface flatness |
<0.55µm (length<50mm) |
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< 1.8% @650nm |
<2µm (length<100mm) |
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< 2.67% @750nm |
<5µm (length>100mm) |
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Coating accuracy |
120nm (±0.20nm) |
Surface roughness |
<0.025µm |
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Optical density OD |
Yellow Chromium 3 (Blue 5) |
Thickness |
1mm,1.6mm,2.3mm,3mm(±0.2mm)(500*500*4.8) |
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White background |
Minimum line width:10µm |
Minimum/maximum size |
Min: 2×2 mm |
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White background thickness: 40 µ m (smooth white coating on the back) |
Max: 800×960mm (±0.1mm) |
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Positive & negative shapes |
Positive: pattern opaque Negative: pattern translucent |
Appearance and shape |
Square |