如果採用 Code V 軟體,那麼可以用 SAGF 函數計算面深(Sag)量: Pd8![Z3
SAGF(surface_num, zoom_pos, x_coord, y_coord) - Sag of the designated surface at x_coord, y_coord 0-B5`=yU
n'"/KS+_
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: &5>Kl}7
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y>W
(1) 使用 Zygo 干涉儀 Q-(zwAaE
函數 @VFA(zoom #, surface #, height) ,<.V7(|t)
Surface is testable for @VFA < 1.0 &j;wCvE4+
Surface is not testable for @VFA > 1.0 Q3 ea{!r
|NlO7aQ>2H
(2)使用 QED 干涉儀 <;lkUU(WT2
函數 @SSIa(surface #, zoom #, height) ${DUCud,kY
0 <= @SSIa < 0.5 - surface is readily testable (|2t#'m
0.5 <= @SSIa < 1 - surface is marginally testable kj Jn2c:y
@SSIa >= 1 - surface is difficult to test