如果採用 Code V 軟體，那麼可以用 SAGF 函數計算面深(Sag)量： |}l/6WHB
SAGF(surface_num, zoom_pos, x_coord, y_coord) - Sag of the designated surface at x_coord, y_coord mv<cyWp
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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: (>Sy,
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(1) 使用 Zygo 干涉儀 _Wp,
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函數 @VFA(zoom #, surface #, height) 8yr-X!eF
Surface is testable for @VFA < 1.0 n`Ypv{+ {%
Surface is not testable for @VFA > 1.0 } BP.t$_
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(2)使用 QED 干涉儀 .j!:Hp(z}
函數 @SSIa(surface #, zoom #, height) _=w=!U &W
0 <= @SSIa < 0.5 - surface is readily testable 'mU\X!-
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0.5 <= @SSIa < 1 - surface is marginally testable RZvRV?<bR
@SSIa >= 1 - surface is difficult to test
