找到參考資料了。 x*8lz\w
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From Smith, Modern Lens Design, 2nd ED, page 4 0i76(2
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Are aspheric surfaces free of aberration? SR,id B&i
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The conic aspherics (e.g., paraboloid, ellipsoid, hyperboloid, and the sphere) have 7^{M:kYC!
no spherical aberration if the object point is at one focal point and the ])d_B\)Kck
image is at the other. But if we depart from this condition we definitely aoLYw 9
do get spherical aberration. (J c} K