Calibration patterns

Accurate calibration of machine vision systems

Catalog 2019

Any machine vision lens (either telecentric or not) shows some amount of distortion. In addition to barrel or pincushion distortion, changes in the view angle or misaligned components will affect the image symmetry and generate the so called thin prism or keystone effect.

Imaging and metrology applications often require to minimize distortion, which can be software-corrected by analyzing the image of a precision pattern whose geometrical features are well known. For this reason Opto Engineering offers chrome-on-glass patterns optimized for software calibration, featuring extremely high geometrical accuracy thanks to photolithography techniques. The range of available chessboard patterns is compatible with most Opto Engineering telecentric lenses.

	Compatibility		Mechanical specifications
Part number	Compatible telecentric lenses	Compatible CMPH pattern mounts	Dimensions width × height	Thickness	Active area width × height	Squares width	Dimensional accuracy
	Part numbers ending in		(mm × mm)	(mm)	(mm × mm)	(mm)	(µm)
PT004-009Calibration pattern	004, 007 and 009	CMPH 004-024	33 x 26	3.0	15 x 13	0.20	1.29	Quote
PT016-024Calibration pattern	016, 024	CMPH 004-024	33 x 26	3.0	31 x 24	0.60	1.52	Quote
PT036-056Calibration pattern	036, 048 and 056	CMPH 036-056	66 x 52	3.0	64 x 51	1.35	1.9	Quote
PT064-096Calibration pattern	064, 072, 080, 085 and 096	CMPH 064-096	107 x 83	3.0	105 x 79	2.20	2.4	Quote
PT120-240Calibration pattern	110, 120, 130, 144, 172, 192, 200, 240	-	229 x 229	3.0	208 x 208	4.00	3.7	Quote

Technical documents

Data table

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Compatible products

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