JP2015007695A5

JP2015007695A5 -

Info

Publication number: JP2015007695A5
Application number: JP2013132456A
Authority: JP
Filing date: 2013-06-25
Publication date: 2016-07-14

Description

近年、眼鏡レンズでは、軽量で耐衝撃性に優れ、かつ染色しやすいとの利点からプラスチックレンズが多用されている。眼鏡レンズに使用されるプラスチックレンズには、表面反射を防止する目的で、通常、その両面に反射防止膜が施されている。通常用いられる眼鏡レンズ用反射防止膜は、一般的に３８０ｎｍ〜７８０ｎｍの可視領域全域にわたって、低い反射特性（広帯域低反射特性）を有する。
眼鏡レンズ等の光学部品においては、従来、プラスチックの基材と、その基材上に配置される反射防止膜とを備えた光学部品が知られている。 In recent years, plastic lenses are frequently used for spectacle lenses because of their advantages of being lightweight, excellent in impact resistance and easy to dye. In order to prevent surface reflection, plastic lenses used for spectacle lenses are usually provided with antireflection films on both sides. Spectacle lens antireflection film normally used is over the entire visible range of generally 380 nm to 780 nm, with a low reflection characteristic (wideband low-reflection characteristics).
2. Description of the Related Art Conventionally, optical parts such as eyeglass lenses are known that include a plastic base material and an antireflection film disposed on the base material.

上記目的を達成するために、本発明の光学部品は、プラスチックレンズの少なくとも裏面に多層膜を備えた光学部品であって、前記プラスチックレンズの裏面に配設された前記多層膜は、入射角が０度〜４５度の時の２８０ｎｍ〜３８０ｎｍの波長領域における平均反射率が１５％以下であり、前記裏面に配設された前記多層膜は、高屈折率物質からなる高屈折率層と低屈折率物質からなる低屈折率層との３層以上の重ね合わせからなり、前記高屈折率物質は酸化物からなり、前記裏面に配設された前記多層膜中の少なくとも１つの高屈折率層は、その光学的膜厚が０．４００〜０．７００λであり、前記裏面に配設された前記多層膜の全体の膜厚に対する前記高屈折率層が占める割合が４５％より大きいことを特徴とする。 In order to achieve the above object, an optical component of the present invention is an optical component including a multilayer film on at least the back surface of a plastic lens, and the multilayer film disposed on the back surface of the plastic lens has an incident angle. The average reflectance in the wavelength region of 280 nm to 380 nm at 0 ° to 45 ° is 15% or less, and the multilayer film disposed on the back surface includes a high refractive index layer made of a high refractive index material and a low refractive index. The high refractive index material is made of an oxide, and at least one high refractive index layer in the multilayer film disposed on the back surface is composed of three or more layers with a low refractive index layer made of a refractive index material. , its optical thickness Ri 0.400~0.700λ der, characterized in that greater than the high refractive index layer proportion of 45% relative to the total thickness of the multilayer film is disposed on the back surface And

ここで、前記裏面に配設された前記多層膜は、入射角が０度〜４５度の時の２８０ｎｍ〜３８０ｎｍの波長領域における前記平均反射率が１０％以下であることが好ましい。
また、前記裏面に配設された前記多層膜の反射光の視感反射率が１．５％以下、かつ、その色相角が１２０〜２２０度であることが好ましい。 Here, the multilayer film disposed in front Symbol rear surface, it is preferable that the average reflectance in the wavelength region of 280nm~380nm when the incident angle is 0 degrees to 45 degrees is 10% or less.
Moreover, it is preferable that the luminous reflectance of the reflected light of the multilayer film disposed on the back surface is 1.5% or less and the hue angle is 120 to 220 degrees.

Claims

An optical component having a multilayer film on at least the back surface of a plastic lens,
The multilayer film disposed on the back surface of the plastic lens has an average reflectance of 15% or less in a wavelength region of 280 nm to 380 nm when the incident angle is 0 degree to 45 degrees,
The multilayer film disposed on the back surface is composed of three or more layers of a high refractive index layer made of a high refractive index material and a low refractive index layer made of a low refractive index material,
The high refractive index material is an oxide of at least one high refractive index layer in the multilayer film disposed on the back side, Ri its optical thickness 0.400~0.700λ der,
The optical component, wherein a ratio of the high refractive index layer to a total film thickness of the multilayer film disposed on the back surface is greater than 45% .

The multilayer film disposed on the back side, according to claim 1, wherein the average reflectance in the wavelength region of 280nm~380nm when the incident angle is 0 degrees to 45 degrees is 10% or less Optical components.

Wherein disposed on the rear surface luminous reflectance of the reflected light of the multilayer film is less than 1.5%, and, according to claim 1 or 2 its hue angle is characterized by a 120 to 220 degrees Optical component.

One high refractive index layer that is the thick film is a layer farthest from the base material of the plastic lens among the high refractive index layers in the multilayer film disposed on the back surface. The optical component according to any one of claims 1 to 3 .

The conductive film, the metal film, or the visible light absorbing film is provided between the high refractive index layer and the low refractive index layer constituting the multilayer film disposed on the back surface. The optical component according to any one of 1 to 4 .

The plastic lens, an optical component according to any one of claims 1 to 5, characterized in that it has a function of absorbing ultraviolet rays.

Base material of the plastic lens is colored, the optical component according to any one of claims 1 to 6, the transmittance is characterized in that 5 to 85%.

In the wavelength region of 280 nm to 380 nm, the spectral characteristic curve representing the reflectance of the multilayer film disposed on the back surface with respect to the wavelength is a curve having one maximum value or a monotonous curve having no extreme value. Yes,
When the spectral characteristic curve is a curve having the one maximum value, the one maximum value is a reflectance of 20% or less, and when the spectral characteristic curve is a curve having a minimum value, the minimum value is optical component according to any one of claims 1 to 7, wherein 5% or less.

The multilayer film, in addition to the back surface of the plastic lens, further, the optical component according to any one of claims 1-8, characterized in that disposed on the surface of the plastic lens.