如果採用 Code V 軟體,那麼可以用 SAGF 函數計算面深(Sag)量: {(t (}-:Z
SAGF(surface_num, zoom_pos, x_coord, y_coord) - Sag of the designated surface at x_coord, y_coord ,,@_r&f:
Ir]b.6B
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: O*jNeYA
L:'Y#VI{
(1) 使用 Zygo 干涉儀 AjZT- Q0L
函數 @VFA(zoom #, surface #, height) |Q7Ch]G
Surface is testable for @VFA < 1.0 Z-:$)0f
Surface is not testable for @VFA > 1.0 uz*C`T0:rj
;7qk9rz4
(2)使用 QED 干涉儀 YXBS!89m
函數 @SSIa(surface #, zoom #, height) h; {?z
0 <= @SSIa < 0.5 - surface is readily testable a8dR.
0.5 <= @SSIa < 1 - surface is marginally testable :CH'Bt4<
@SSIa >= 1 - surface is difficult to test