还有一点忘了说了, 就是公差计算时的视场设定? 是Y对称? XY对称? 用户自定义? 我的解释只是针对用户自定义时的结果. t ?^!OJ:L
具体的内容请见下面: 2 N(Z^
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Fields: Generally speaking, the field definitions used for optimization and analysis are inadequate for 5s%e9x|kP
tolerancing. for example, a rotationally symmetric lens may use field definitions of 0, 7, and 10 degrees. For 2xi; 13?
tolerancing purposes, the lack of symmetry in the field definitions may cause inaccurate results when analyzing EGFP$n vq
tilt or decenter tolerances. When constructing a merit function to use for tolerancing ZEMAX can use three < j
different field settings: B(FM ~TVZ
Y-Symmetric: ZEMAX computes the maximum field coordinate, then defines new field points at +1.0, +0.7, |gk4X%o6
0.0, -0.7, and -1.0 times the maximum field coordinate, in the Y direction only. All X field values are set to hb0)<^xu
zero. This is the default for rotationally symmetric lenses. *E>R1bJ8
XY-Symmetric: Similar to Y-Symmetric, except there are 9 field points used. The 5 Y-Symmetric points are SG~HzQ\%
used, and -1.0, -0.7, +0.7, and +1.0 are added in the X axis direction only. @D["#pe,}
User Defined: Use whatever field definitions exist in the current lens file. This option is required when using $M,Q"QL
vignetting factors, tolerancing multiple configuration lenses, or using tolerance scripts. It is also highly .`u8(S+
recommended when tolerancing non rotationally symmetric lenses or lenses with complex field weighting q|kls up
that user defined fields be used.
