Solid Dot Series Calibration Board
Unit: mm
Specifications
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Model GR050-0.25: External dimension 50×50 mm, dot diameter 0.25 mm, center distance 0.5 mm, array 71×71, pattern dimension 35.25×35.25 mm, accuracy ±0.01 mm
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Model GR070-0.5: External dimension 70×70 mm, dot diameter 0.5 mm, center distance 1 mm, array 53×53, pattern dimension 52.5×52.5 mm, accuracy ±0.01 mm
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Model GR100-1: External dimension 100×100 mm, dot diameter 1 mm, center distance 2 mm, array 43×43, pattern dimension 85×85 mm, accuracy ±0.01 mm
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Model GR150-1.5: External dimension 150×150 mm, dot diameter 1.5 mm, center distance 3 mm, array 45×45, pattern dimension 133.5×133.5 mm, accuracy ±0.01 mm
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Model GR200-2.5: External dimension 200×200 mm, dot diameter 2.5 mm, center distance 5 mm, array 37×37, pattern dimension 182.5×182.5 mm, accuracy ±0.01 mm
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Model GR260-3: External dimension 260×260 mm, dot diameter 3 mm, center distance 6 mm, array 41×41, pattern dimension 243×243 mm, accuracy ±0.01 mm
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Model GR300-5: External dimension 300×300 mm, dot diameter 5 mm, center distance 10 mm, array 27×27, pattern dimension 265×265 mm, accuracy ±0.01 mm
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Model GR400-7.5: External dimension 400×400 mm, dot diameter 7.5 mm, center distance 15 mm, array 25×25, pattern dimension 367.5×367.5 mm, accuracy ±0.01 mm
● Custom sizes are available for dimensions not listed above!
Material
Aluminum oxide, non-reflective surface.
1. Features of the Calibration Board
Manufactured with high-precision processing technology, it has a low thermal expansion coefficient, high accuracy (±0.01 mm), and can be customized to various sizes.
2. Application Scope
It is a high-precision calibration tool dedicated to research institutions or the vision field. It is applicable to 3D image measurement, 3D reverse engineering, stereo matching, 3D reconstruction, etc. It mainly obtains camera calibration result data through calibration software.
3. Function
It is used to correct lens distortion, determine the conversion relationship between physical dimensions and pixels, and clarify the correlation between the 3D geometric position of a point on the surface of a spatial object and its corresponding point in the image. It is necessary to establish a geometric model of camera imaging. For high-precision measurement, lens distortion is unavoidable; calibration is used to improve the application performance of high-precision measurement and inspection, so as to achieve satisfactory accuracy.
4. Usage
Most software supports using solid dots or grids as landmarks. In the high-precision camera calibration process, features are mostly used as reference points, and the center position is accurately extracted through graphic fitting. The deformation caused by projection is eliminated using the known parameters of the calibration template.