Sulfonated polystyrene as a new gradient-index medium for light-focusing elements.
We have discovered that the sulfonation of polystyrene can form a gradient-index medium useful for lightfocusing purposes. We found that the refractive index of sulfonated polystyrene varies with the degree of sulfonation and that the refractive index of the fully sulfonated polystyrene decreased by approximately 0.06 at 0.633 microm from that of pure polystyrene.
Jung
S D
SD
Hwang
W Y
WY
Song
S H
SH
Lee
el-H
el-H
Lee
J I
JI
Shim
H K
HK