Target

Position (mm)

Defocusing distance when the target is defocused at different positions by traditional method (mm)

Defocusing distance when the target is defocused at different positions by DFD method (mm)

−1

0.14

0.14

−0.5

0.10

0.07

0

0.07

0.05

0.5

0.04

0.04

1

0

−0.02

1.5

−0.04

−0.03

2

−0.07

−0.04

2.5

−0.10

−0.06