Patent ID: 7737194

Claim:
A colorless transparent silicone lens produced by thermally curing a silicone resin composition comprising (A) an organopolysiloxane having a resin structure comprising R 1 SiO 1.5 unit, R 2 2 SiO unit, and R 3 a R 4 b SiO (4-a-b)/2 unit wherein R 1 , R 2 , and R 3 are independently methyl group, ethyl group, propyl group, cyclohexyl group, or phenyl group, R 4 is vinyl group or allyl group, a is 0, 1, or 2, b is 1 or 2, and a+b is 2 or 3, and wherein number of repetition of the R 2 2 SiO unit is 5 to 300, (B) an organohydrogen polysiloxane having a resin structure comprising R 1 SiO 1.5 unit, R 2 2 SiO unit, and R 3 c H d SiO (4-c-d)/2 unit wherein R 1 , R 2 , and R 3 are as described above, c is 0, 1, or 2, d is 1 or 2, and c+d is 2 or 3, and wherein number of repetition of the R 2 2 SiO unit is 5 to 300, the component (B) included at an amount such that molar ratio of the hydrogen atom bonded to the silicon atom in the component (B) to the vinyl group or the allyl group in the component (A) is 0.1 to 4.0, and (C) an effective amount for curing of a platinum group catalyst.