如果採用 Code V 軟體,那麼可以用 SAGF 函數計算面深(Sag)量: y+
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SAGF(surface_num, zoom_pos, x_coord, y_coord) - Sag of the designated surface at x_coord, y_coord 7gVh!rm
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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: y'J:?!S,Yu
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(1) 使用 Zygo 干涉儀 N`,7 FI}
函數 @VFA(zoom #, surface #, height) =F'l's^j
Surface is testable for @VFA < 1.0 bc3|;O
Surface is not testable for @VFA > 1.0 fs2mN1
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(2)使用 QED 干涉儀 HpB!a,R6B
函數 @SSIa(surface #, zoom #, height) s
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0 <= @SSIa < 0.5 - surface is readily testable -:)DX++
0.5 <= @SSIa < 1 - surface is marginally testable J-t=1
@SSIa >= 1 - surface is difficult to test