Patent ID: 7285323

Claim:
An optical multilayer film comprising a hard coat layer and a low refractive index layer comprising a transparent porous body having bubbles dispersed in a matrix composed of a hydrolyzable organic silicon compound or a hydrolyzed product thereof, wherein the hard coat layer and the low refractive index layer are laminated, in this order, directly or with another intervening layer on one surface of a base film comprising a transparent resin, wherein the refractive index n H of the hard coat layer and the refractive index n L of the low refractive index layer satisfy the following three formulae [1],[2] and [3], 1.25≦n L ≦1.37 Formula [1] n H ≧1.53 Formula [2] ( n H ) 1/2 −0.2 <n L <( n H ) 1/2 +0.2 Formula [3].