Fiber optic sheet formation by selective photopolymerization

Fiber optic sheets (8 lines/mm), applicable as image convertors in a facsimile input system, have been formed by a selective monomer photopolymerization in polymer films. In this method, the monomer is doped in a plane film with a higher refractive index and then photopolymerized selectively through a mask pattern by uv light irradiation, so that all light paths are formed simultaneously, instead of arranging individual optical fibers. The attenuation was 0.15-0.20 dB/cm at lambda = 633 nm, and the output light intensity distribution formed by a test chart through light paths showed a resolution of up to ~5 lines/mm.