Patent ID: 8313827

Claim:
A laminated film with 200 or more laminated layers including at least layers comprising a resin A and layers comprising a resin B, wherein taking the layers comprising the resin A having a layer thickness from 10 nm to 1000 nm as a layer group L, wherein the layer group L has a three-step or more slant structure in which distribution of the layer thickness is approximated by three or more monotonous increase curves and/or monotonous decrease curves and, in the direction from one surface to the other, these are arranged in the order of a layer La, a layer Lb, and a layer Lc, wherein the thickness of the layer Lc is 0.95-fold or more and 1.05-fold or less relative to the thickness of the layer La and at least 30 layers, each layer comprising the resin A, are included between the layer La and the layer Lc, and the thickness of the layer La is at least 1.4-fold or more and 0.7-fold or less the thickness of the layer Lb.