There are provided an optical element that comprises a polymer which has a structural unit derived from a specific dihydroxy compound typified by 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoro propane (bisphenol AF) and in which the relationship between a refractive index n
D
and an Abbe number ν
D
satisfies the following formula (I):
n
D
+0.0076×ν
D
≦1.78 (I)
and that is used for correction of chromatic aberration, and an achromatic lens using the optical element.
There are provided an optical element that comprises a polymer which has a structural unit derived from a specific dihydroxy compound typified by 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoro propane (bisphenol AF) and in which the relationship between a refractive index nD and an Abbe number νD satisfies the following formula (I): nD+0.0076×νD≤1.78
and that is used for correction of chromatic aberration, and an achromatic lens using the optical element.
A decorative sheet for injection molding, having a base film comprising a polycarbonate resin containing a plant-derived ether diol residue and a decorative layer formed on at least one side of the base film. The decorative sheet for injection molding is excellent in deformation resistance, distortion resistance and whitening resistance when it decorates a resin molded product.
This invention provides an insert-molded article that is excellent in mechanical strength and melt-flowability, has a high surface hardness and is formed of a polycarbonate resin obtained from biomass resources.
This invention is an insert-molded article obtained by inserting a functional resin film in a mold beforehand and injecting a polycarbonate resin to mold it, wherein the polycarbonate resin comprises a constituent unit derived from a dihydroxy compound represented by the following formula (a).
A resin which has high heat resistance, high surface hardness and excellent moldability and is obtained from a biomass resource and a molded article thereof.
The above polycarbonate resin comprises a unit (A) represented by the following formula:
and a unit (B) represented by the following formula:
as the main recurring units, the molar ratio of the unit (A) to the unit (B) being 5/95 to 95/5.