Calibration Plates¶

Material and Processing¶

All calibration targets of outer size 160x160mm and smaller are screen printed ceramic substrates of nominal thickness 1mm. Larger calibration targets consist of aluminum composite material of 3mm thickness or safety glass substrates of 4mm thickness. For all types the printing process is conducted with high-precision screens at room temperature without per-piece print calibrations or measurements. We therefore cannot provide any hard guarantees on the accuracy, but the following sections will outline what printing accuracy can be expected in general.

Dimensions¶

In the below images the dimensions of the calibration targets are given. The parameter \(s\) describes the grid spacing of the corresponding pattern.

Halcon Pattern¶

Ensenso Pattern¶

Specifications¶

The position of the print is not aligned to the substrate.

Ceramic Calibration Targets¶

Optonic Part Number: 11248 (100x100x1mm, 12mm grid spacing)

Accuracy of barycenters of dot grid
- Relative deviation of distances of neighboring points: ≤ 0.1e-3
- Absolute deviation of grid spacing: ≤ 1e-3
Thermal expansion: ~ 8e-6/K
Outer dimension tolerance: ±0.25mm
Thickness tolerance: ±0.1mm

Aluminum Calibration Targets¶

Optonic Part Number: 11249 (200x200x3mm, 24mm grid spacing)

Accuracy of barycenters of dot grid
o Relative deviation of distances of neighboring points: ≤ 0.1e-3 o Absolute deviation of grid spacing: ≤ 1e-3
Thermal expansion: ~ 24e-6/K

Outer dimension tolerance: ±0.5mm

Thickness tolerance: ±0.2mm

Glass Targets¶

Optonic Part Number: 13095 (390x390x3mm, 48mm grid spacing)

Accuracy of barycenters of dot grid
o Relative deviation of distances of neighboring points: ≤ 0.1e-3 o Absolute deviation of grid spacing: ≤ 5e-4
Thermal expansion: ~ 9e-6/K

Outer dimension tolerance: ±1mm

Thickness tolerance: ±0.4mm

Note

Thermal expansion is provided for reference only and is usually irrelevant in practical applications.