| abstract |
The present invention relates to structural units derived from specific dihydroxy compounds represented by 2,2-bis (4-hydroxyphenyl) -1,1,1,3,3,3-hexafluoropropane (bisphenol AF). Wherein the relationship between the refractive index n D and the Abbe's number ν D is made of a polymer satisfying n D + 0.0076 × ν D ≦ 1.78 (I) in the following formula (I), and is used for correction of chromatic aberration: An optical element and a chromatic aberration correcting lens using the optical element. |