Pixel Density & Component Accuracy: Does Width Matter?

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To determine the accuracy of a CCD with a pixel density of 10Mpixel (1cm^-2) imaging a 10cm component, both length and width are essential. The accuracy requirement of +/- 0.025mm cannot be met without knowing the component's width, as it affects the pixel size calculation. The discussion highlights a disagreement between the lecturer and the poster regarding the necessity of both dimensions for accuracy assessment. Without the width, the CCD's capability to meet the required accuracy cannot be accurately evaluated. Thus, both dimensions are crucial for a complete analysis of the imaging system's performance.
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The following question appeared on one of my exam papers.

A CCD of pixel density 10Mpixel (1cm^-2) is used to image a component of length 10cm.
Show how this does or does not meet the required accuracies of +/- 0.025mm.

A similar question was asked in a previous exam where the component's length was 10cm but a width of 1cm was also specified.

I would like to know whether or not both length and width are required in order to determine a solution.

I was of the impression that both dimensions would be needed but my lecturer disagrees.

Can anyone clarify the situation?
 
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In order to determine the accuracy of the CCD, both length and width must be taken into account. A CCD of pixel density 10Mpixel (1cm^-2) is not enough to determine the accuracy of the component of length 10cm. To calculate the required accuracy, the pixel size and the length and width of the component need to be known. In this case, since the width of the component is not given, it is impossible to determine the accuracy of the CCD.
 
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