The method includes forming a film on {HEAD ~ the optical substrate} by using {TAIL ~ a coating liquid} containing a metal alkoxide containing at least aluminum, immersing the film in a water containing liquid, baking the film having been immersed in the water containing liquid, and subjecting the film having been baked to treatment with warm water to form an aluminum containing film having a fine irregularity structure 
by using
The method includes forming a film on { HEAD ~ the optical substrate } by using { TAIL ~ a coating liquid } containing a metal alkoxide containing at least aluminum , immersing the film in a water containing liquid , baking the film having been immersed in the water containing liquid , and subjecting the film having been baked to treatment with warm water to form an aluminum containing film having a fine irregularity structure
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH