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 a full range of patterns optimized for software calibration compatible with most Opto Engineering® telecentric lenses.

The chessboards are realized with two different processes in order to provide the best solution depending on the requirements:

Chrome on glass, for leading edge applications;
Emulsion on glass, for a perfect synthesis of performance and cost effectiveness.

Moreover, a certified version is available: standards and equipment used for calibration have been calibrated traceable to the National Institute of Standards and Technology (N.I.S.T.), in accordance with procedures set forth in ISO/IEC 17025-2005 and ANSI/NCSL Z540-1-1994.

	Compatibility		Mechanical specifications
Part number	Compatible telecentric lenses	Compatible CMPH pattern mounts	Dimensions width × height	Thickness	Active area width × height	Squares width	Photomask type	Class	Certificate
	Part numbers ending in		(mm × mm)	(mm)	(mm × mm)	(mm)
								1	2
PT004-009Calibration pattern	004, 007 and 009	CMPH 004-024	33 x 26	3	15 x 13	0.20	Chrome-on-glass	1	No	Buy now
PT016-024Calibration pattern	016, 024	CMPH 004-024	33 x 26	3	31 x 24	0.60	Chrome-on-glass	1	No	Buy now
PT036-056Calibration pattern	036, 048 and 056	CMPH 036-056	66 x 52	3	64 x 51	1.35	Chrome-on-glass	1	No	Buy now
PT064-096Calibration pattern	064, 072, 080, 085 and 096	CMPH 064-096	107 x 83	3	105 x 79	2.20	Chrome-on-glass	1	No	Buy now
PT120-144Calibration pattern for telecentric lenses	110, 120, 130 and 144	-	180 x 140	3	170 x 140	3.00	Chrome-on-glass	2	No	Quote
PT192-240Calibration pattern for telecentric lenses	192, 200, 240	-	300 x 240	3	260 x 200	4.00	Chrome-on-glass	2	No	Quote
PT260-310Calibration pattern for telecentric lenses	-	-	340 x 280	3	320 x 260	5.00	Chrome-on-glass	2	No	Quote
PT004-009-CCalibration pattern for telecentric lenses with a certificate of conformity	004, 007 and 009	CMPH 004-024	33 x 26	3	15 x 13	0.20	Chrome-on-glass	2	Yes	Quote
PT016-024-CCalibration pattern for telecentric lenses with a certificate of conformity	016, 024	CMPH 004-024	33 x 26	3	31 x 24	0.60	Chrome-on-glass	2	Yes	Quote
PT036-056-CCalibration pattern for telecentric lenses with a certificate of conformity	036, 048 and 056	CMPH 036-056	66 x 52	3	64 x 51	1.35	Chrome-on-glass	2	Yes	Quote
PT064-096-CCalibration pattern for telecentric lenses with a certificate of conformity	064, 072, 080, 085 and 096	CMPH 064-096	107 x 83	3	105 x 79	2.20	Chrome-on-glass	2	Yes	Quote
PT120-144-CCalibration pattern for telecentric lenses with a certificate of conformity	110, 120, 130 and 144	-	180 x 140	3	170 x 140	3.00	Chrome-on-glass	2	Yes	Quote
PT192-240-CCalibration pattern for telecentric lenses with a certificate of conformity	192, 200, 240	-	300 x 240	3	260 x 200	4.00	Chrome-on-glass	2	Yes	Quote
PT260-310-CCalibration pattern for telecentric lenses with a certificate of conformity	-	-	340 x 280	3	320 x 260	5.00	Chrome-on-glass	2	Yes	Quote
PTCP-S1-HR1-CCalibration pattern for telecentric lenses with a certificate of conformity	TCCP12144, TCCP23144, TCCP3MHR144, TCCP5MHR144	-	180 x 140	3	167.4 x 129.6	1.35	Chrome-on-glass	2	Yes	Quote
PTCP-M1-LR1-CCalibration pattern for telecentric lenses with a certificate of conformity	TCCP12192, TCCP23192	-	245 x 196	3	237.6 x 184.8	2.20	Chrome-on-glass	2	Yes	Quote
PTCP-M1-HR1-CCalibration pattern for telecentric lenses with a certificate of conformity	TCCP3MHR192, TCCP5MHR192	-	245 x 196	3	237.6 x 189	1.35	Chrome-on-glass	2	Yes	Quote
PTCP-L1-LR1-CCalibration pattern for telecentric lens with film and certificate of conformity, dimension 300 x 240 mm x mm, squares 2,2 mm	TCCP12260, TCCP23260	-	300 x 240	3	281.6 x 228.8	2.20	Chrome-on-glass	2	Yes	Quote
PTCP-L1-HR1-CCalibration pattern for telecentric lens with film and certificate of conformity, dimension 300 x 240 mm x mm, squares 1,35 mm	TCCP3MHR260, TCCP5MHR260	-	300 x 240	3	286.2 x 226.8	1.35	Chrome-on-glass	2	Yes	Quote
PT064-096-PCalibration pattern for telecentric lens with film, dimension 107 x 83 mm x mm, squares 2,2 mm	064, 072, 080, 085 and 096	CMPH 064-096	107 x 83	3	105 x 79	2.20	Emulsion-on-glass	2 *	No	Quote
PT120-144-PCalibration pattern for telecentric lens with film, dimension 180 x 140 mm x mm, squares 3 mm	110, 120, 130 and 144	-	180 x 140	3	170 x 140	3.00	Emulsion-on-glass	2 *	No	Quote
PT192-240-PCalibration pattern for telecentric lens with film, dimension 300 x 240 mm x mm, squares 4 mm	192, 200, 240	-	300 x 240	3	260 x 200	4.00	Emulsion-on-glass	2 *	No	Quote
PT260-310-PCalibration pattern for telecentric lens with film, dimension 340 x 280 mm x mm, squares 5 mm	-	-	340 x 280	3	320 x 260	5.00	Emulsion-on-glass	2 *	No	Quote
PTCP-S1-HR1-PCalibration pattern for telecentric lens with film, dimension 180 x 140 mm x mm, squares 1,35 mm	TCCP12144, TCCP23144, TCCP3MHR144, TCCP5MHR144	-	180 x 140	3	167.4 x 129.6	1.35	Emulsion-on-glass	2 *	No	Quote
PTCP-M1-LR1-PCalibration pattern for telecentric lens with film, dimension 245 x 195 mm x mm, squares 2,2 mm	TCCP12192, TCCP23192	-	245 x 195	3	237.6 x 184.8	2.20	Emulsion-on-glass	2 *	No	Quote
PTCP-M1-HR1-PCalibration pattern for telecentric lens with film, dimension 245 x 195 mm x mm, squares 1,35 mm	TCCP3MHR192, TCCP5MHR192	-	245 x 195	3	237.6 x 189	1.35	Emulsion-on-glass	2 *	No	Quote
PTCP-L1-LR1-PCalibration pattern for telecentric lens with film, dimension 300 x 240 mm x mm, squares 2,2 mm	TCCP12260, TCCP23260	-	300 x 240	3	281.6 x 228.8	2.20	Emulsion-on-glass	2 *	No	Quote
PTCP-L1-HR1-PCalibration pattern for telecentric lens with film, dimension 300 x 240 mm x mm, squares 1,35 mm	TCCP3MHR260, TCCP5MHR260	-	300 x 240	3	286.2 x 226.8	1.35	Emulsion-on-glass	2 *	No	Quote

Notes

Class number (2*) for Emulsion-on-glass photomasks differs from usual Chrome-on-glass. Specifications are in the tech info section.
Download CoC Format Pattern facsimile

Technical documents

Data table

XLS

CoC Format Pattern 2019

Compatible products

Class 1:
This represents a resolution that is equivalent to approximately 64k dpi. Although this resolution may resolve smaller features, we recommend keeping feature sizes above 10µm as corner rounding is considerable. Edge sharpness and definition is acceptable for non critical design types, although designs with arcs/circles and lines running off 90 degree grid may show pixelation. NO features such as lines / circles / spots / squares below 10 µm.
Class 2:
This represents a resolution that is equivalent to 128k dpi. This resolution will resolve down to 4µm lines and has good line edge qualities with only a small pixelation along edges. Corner rounding is below 3µm but still visible. NO features such as lines / circles / spots / squares below 4µm.
Class 3:
This represents our most common resolution for demanding, high precision photomasks. It is equivalent to 256k dpi , and offers an excellent price / quality balance. This resolution will resolve down to 2µm lines and has very good line edge qualities with no pixelation along edges, and corner rounding is kept to a minimum.

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For Chrome-on-glass Photomask
Class	Min feature dimensions; Min spacing(µm)	Positioning error (µm)	Speed factor (µm/mm)
1	1.4	6.4	0.016
2	0.8	1.6	0.008
3	0.4	0.6	0.004
4	0.2	0.2	0.001

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