如果採用 Code V 軟體,那麼可以用 SAGF 函數計算面深(Sag)量: J8:f9a:|M
SAGF(surface_num, zoom_pos, x_coord, y_coord) - Sag of the designated surface at x_coord, y_coord zf}X%tp
(S=RFd
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: R0_O/o+{
[6{o13mCWE
(1) 使用 Zygo 干涉儀 YNV4'
函數 @VFA(zoom #, surface #, height) >4@/x{{
Surface is testable for @VFA < 1.0 4 g}'/
Surface is not testable for @VFA > 1.0 E0-<-w3'
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(2)使用 QED 干涉儀 bUBQ
函數 @SSIa(surface #, zoom #, height) I|oS`iLl$
0 <= @SSIa < 0.5 - surface is readily testable ^;=L|{Xl
0.5 <= @SSIa < 1 - surface is marginally testable NsY D~n
@SSIa >= 1 - surface is difficult to test