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1. When Modulation Transfer Function (below MTF and abbreviation) is applied to resolution appraisal of the image pickup device, MTF of resolution contrast of the chart, is an advantage where it can express with the product of MTF of each element such as lens, image pickup device and amplifier.
2. When using the rectangular chart, resolution of the image pickup device generally is expressed as Amplitude Response (below AR and abbreviation).
3. It is the aperture response chart in order to measure the influence of the astigmatism of AR and the resolution aperture.
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