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PTTC, PTCP series

Accurate calibration patterns for machine vision systems

Catalog 2019

PT120-240 calibrations pattern has been substituted by PT120-144 for FOVs up to 170x140mm and by PT192-240 for FOVs of up to 260 x 200mm.

Overview
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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.

 
Calibration pattern series
  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

TC telecentric lens for matrix detectors

TC series

Bi-telecentric lenses for matrix detectors up to 2/3″

LTCLHP series

LTCLHP series

High-performance telecentric illuminators

TCBENCH telecentric optical assembly for machine vision applications

TCBENCH series

Telecentric optical benches for easy measurements

CMPH pattern holder

CMPH series

Pattern holders

See also

PTPR series

It’s possible to calculate dimensional tolerance of pattern’s features is calculated as follows:

Dimensional Tolerance = ± (A + B * C)

A = Positioning error

B = Speed factor

C = Dimension of interest

Example of dimensional tolerance for grade 2 pattern over 10mm length:

Dimensional Tolerance = ± 0.0016mm + (±0.000008mm x 10 mm) = ± 0.00168 mm

For Chrome-on-glass Photomask
ClassMin feature dimensions; Min spacing(µm)Positioning error (µm)Speed factor (µm/mm)
11.46.40.016
20.81.60.008
30.40.60.004
40.20.20.001

    For Emulsion-on-glass Photomask

  1. 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.
  2. 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.
  3. 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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