?????
????? (?)?
????????
1.?(curvature astigmatism) ???????????????????????????????0.2D???????????
?????(????)??(?????)?????????????????????????????
????????????????????????
2.??(astigmatism of optical decentration) ????????????????????????
3.??(index astigmatism) ??I??????????^??????????
()
????????????????F1F2?????????????Sturm?(Sturm conoid)(?1A)?1B?????????F1?AB??????CD????????????(1)ABF1????(2)?AB?CD???(1)??(3)?AB?CD????????(4)????(circle of least diffusion)?????????????????????(5)???CD?F2???(6)...
????????
1.?(curvature astigmatism) ???????????????????????????????0.2D???????????
?????(????)??(?????)?????????????????????????????
????????????????????????
2.??(astigmatism of optical decentration) ????????????????????????
3.??(index astigmatism) ??I??????????^??????????
()
????????????????F1F2?????????????Sturm?(Sturm conoid)(?1A)?1B?????????F1?AB??????CD????????????(1)ABF1????(2)?AB?CD???(1)??(3)?AB?CD????????(4)????(circle of least diffusion)?????????????????????(5)???CD?F2???(6)...
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