Fujifilm Corporation

Ryou Matsuno

Takeharu Tani

Hideki Yasuda

Shinya Hakuta

Katsuhisa Ohzeki

Naoharu Kiyoto

Motoi Harada

Provided are a high refractive index film including a high refractive index layer including a binder and flat metal particles, in which a value obtained by dividing an average particle diameter of the flat metal particles by an average thickness is 3 or more, a main plane of the flat metal particles is plane-oriented in a range of 0&#xb0; to 30&#xb0; with respect to a surface of the high refractive index layer, a volume fraction of the flat metal particles of the high refractive index layer is 20 volume % or more, and the flat metal particles are stacked in two or more layers, and an optical interference film using the high refractive index film.

High refractive index film and optical interference film

An anti-reflection optical member has a laminated structure including: a transparent substrate having a first refractive index greater than that of a predetermined medium; a metal-microparticle-containing layer containing metal microparticles; and a dielectric layer having a second refractive index greater than that of the predetermined medium, in this order. At least 60% of the metal microparticles are flat particles with a diameter-to-thickness ratio of 3 or more. Principal planes of the flat metal particles are surface-oriented in the range from 0&#xb0; to 30&#xb0; relative to the surface of the metal-microparticle-containing layer. In the metal-microparticle-containing layer, the metal microparticles are disposed without forming a conductive path. The dielectric layer has such a thickness that light reflected at the surface of the dielectric layer of incident light entering the laminated structure from the surface is interfered and canceled by light reflected at the interface between the dielectric layer and the metal-microparticle-containing layer.

Anti-reflection optical member

A multilayer structure including a metal particles-containing layer, a layer A having a refractive index, n1, and a layer B having a refractive index, n2, and satisfying one of the conditions (1-1) and (2-1) is capable of suppressing reflection of light at a wavelength &#x3bb; intended to prevent reflection.1&#x3c;2 and&#x3bb;/4+&#x3bb;/2&#x3c;1&#xd7;1&#x3c;&#x3bb;/2+&#x3bb;/2&#x2003;&#x2003;Condition (1-1)1&#x3e;2 and0+&#x3bb;/2&#x3c;1&#xd7;1&#x3c;&#x3bb;/4+&#x3bb;/2&#x2003;&#x2003;Condition (2-1)wherein m represents an integer of 0 or greater; &#x3bb; represents a wavelength with a unit of nm intended to prevent reflection; n1 represents a refractive index of the layer A; and d1 represents a thickness with a unit of nm of the layer A.

Growing community of inventors

Ashigarakami-gun, Japan

Ryou Matsuno