| 摘要 |
PURPOSE:To permit MTF of an arbitrary image height in the directions orthogonal to each other to be readily and reliably measured by using a chart having specific shape. CONSTITUTION:A frequency chart comprises a one-dimentional lattice pattern portion LA towards A, a one-dimentional lattic pattern portion LB towards B, a white portion W provided at the intersection of the lattic pattern portions LA and LB, and black portions NA and NB provided adjacent to the white portion W. The white portion W and the black portions NA and NB are used for measuring MTF of a space frequency 0. The space frequencies of the one-dimentional lattice pattern portions LA and LB are the space frequencies to be measured. |
