如果採用 Code V 軟體,那麼可以用 SAGF 函數計算面深(Sag)量: s,0,w--=
SAGF(surface_num, zoom_pos, x_coord, y_coord) - Sag of the designated surface at x_coord, y_coord r|&qXb x
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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: H*l8,*M}
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(1) 使用 Zygo 干涉儀 JK,k@RE y]
函數 @VFA(zoom #, surface #, height) WhvO-WF
Surface is testable for @VFA < 1.0 BM:je(*p
Surface is not testable for @VFA > 1.0 B&tl6?7h
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(2)使用 QED 干涉儀 +lE 9*Gs_$
函數 @SSIa(surface #, zoom #, height) b-ZvEDCR
0 <= @SSIa < 0.5 - surface is readily testable }4+S_b
0.5 <= @SSIa < 1 - surface is marginally testable R,tR{| 8
@SSIa >= 1 - surface is difficult to test