Synthetic resin lens and antireflection coating

摘要: A synthetic resin lens having a refractive index of at least 1.55 and an antireflection coating thereon is provided. The includes hard coat layer formed dielectric substance nh disposed on the ns (ns ≠nh) one or metallic material between layer. has n in range represented by formula: ##EQU1## optical film thickness 4 (where denotes wavelength about 450 nm to 650 nm) two more plies optically equivalent single material. may be prepared radical polmerization mixed monomer solution styrene, 2,2-bis[3,5-dibromo-4-(2-methacryloloxyethoxy)phenyl]propane, ultraviolet absorber light stabilizer. Such lenses generally have 1.6 surface hardening usually SiO2 1.46. It desirable provide 1.52 which provided first silicon dioxide another oxide selected from group oxides ZrO2, HfO2, Ti2 O3 TiO2, Ta2 O5, Si3 N4, Yb2 O3, Y2 Al2 O3. An outer then