| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical lens excellent in optical basic characteristics such as refractive index, double refraction and light transmittance and having high heat stability, low water absorbing property, high hardness and superior formability. SOLUTION: The optical lens has a silicone resin which satisfies the conditional expressions (the number of silicon atoms in the form of R1SiO3/2)/(the total number of silicon atoms)>0, (the number of silicon atoms in the form of SiO4/2)/(the total number of silicon atoms)>0 and (the number of silicon atoms in the form of R1SiO3/2)+(the number of silicon atoms in the form of SiO4/2)}×100/(the total number of silicon atoms)>=20% (where R1 is H, hydroxyl, amino group, halogen atom or an organic group).
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