TEST CHART OF LENS PROPERTY EVALUATING DEVICE AND MEASURING METHOD OF IMAGE MAGNIFICATION

摘要

PROBLEM TO BE SOLVED: To provide a test chart of a lens property evaluating device capable of accurately measuring an image magnification without being affective by the rectangularity or the like of a slit when the test chart is scanned. SOLUTION: The lens property evaluating device evaluates the property of a lens to be tested by picking up an image using an image pickup element and an optical system that includes the lens to be tested. the test chart 1 of the lens property evaluating device includes a pinhole 2 disposed on the chart plane and a ring-like dark or bright region pattern 3 being concentric with the pinhole 2 and having a known diameter R.