The distance between images taken along the optical z-axis and the number of images projected into a single plane is indicated. |
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Each cell is shown at seven different focal points separated by 1-m distances in the z-axis. |
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The resolution of the height measurement is mainly limited by the z-axis noise, which is normally a few tenths of a nanometer under standard imaging conditions. |
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A helical scan with a pitch of zero is equivalent to constant z-axis scanning. |
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The cylindricity of this hole characterizes the straightness error of the z-axis motion. |
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Options for electronic z-axis measurement, lens replacement where necessary and calibration graticules will be available. |
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