如果採用 Code V 軟體，那麼可以用 SAGF 函數計算面深(Sag)量： ^| F Vc48{
SAGF(surface_num, zoom_pos, x_coord, y_coord) - Sag of the designated surface at x_coord, y_coord i-i}`oN
gJcXdv=]2
如果想知道的是某一非球面的型狀是否能由干涉儀測量，那麼 Code V 提供兩個函數: c] g<XVI
Dho[{xJ46
(1) 使用 Zygo 干涉儀 = h<? /Krs
函數 @VFA(zoom #, surface #, height) @??c<]9F
Surface is testable for @VFA < 1.0 ,#'o)O#
Surface is not testable for @VFA > 1.0 'sj JSc
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(2)使用 QED 干涉儀 }]39
iK`w
函數 @SSIa(surface #, zoom #, height) [MQJ71(3
0 <= @SSIa < 0.5 - surface is readily testable <mo^Y k3
0.5 <= @SSIa < 1 - surface is marginally testable ?,i#B'Z^
@SSIa >= 1 - surface is difficult to test
