Table 4: Parameters of depth and radius of object, the long axis (a) and short axis (b).

t/nsh/macbcbc/ac(bc/ac)t

1.230.050.080.101.240.76
1.930.100.120.151.251.21
3.390.200.210.261.222.07
4.850.300.310.371.222.96
6.370.400.400.481.213.85
7.840.500.490.601.214.74
9.360.600.590.711.205.64

ac and bc represent the correction of long axis (a) and short axis (b) of hyperbolic curves, respectively.