Optical component and method for manufacturing the same

G - Physics – 02 – B

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G02B 1/11 (2006.01) G02C 7/02 (2006.01)

Patent

CA 2701672

An optical component which includes: a plastic substrate; and an antireflection film disposed on the substrate, wherein the antireflection film is a multilayer film having alternately-laminated six or more layers including high refractive index layers and low refractive index layers; a first layer of the antireflection film deposited closest to the substrate is a high refractive index layer; .lambda. satisfies 480 nm<=.lambda.530 nm where .lambda. is the wavelength of light incident into the antireflection film; an optical thickness D1 of the first layer satisfies 0.02.lambda.D1<=0.04.lambda.; an optical thickness Dm of a layer of the antireflection film that is located fifth from an outermost layer deposited furthest from the substrate satisfies 0.19.lambda.<=Dm<=0.75.lambda.; a total physical thickness dt of the entire antireflection film satisfies 350 nm<=dt<=480nm; and a total physical thickness da of the low refractive index layers satisfies 0.65 dt<=da<=0.80dt.

L'invention porte sur un composant optique comprenant un substrat en matière plastique et un film antireflet disposé sur le substrat, le film antireflet comprenant un film multicouche ayant au moins six couches, comprenant des couches à indice de réfraction élevé et à indice de réfraction faible superposées de façon alternée les unes sur les autres, et la première couche du film antireflet qui est la plus proche du substrat constitue l'une des couches à indice de réfraction élevé, et si ? représente une longueur d'onde d'une lumière incidente sur le film antireflet, alors ? satisfait la relation 480 nm = ? = 530 nm, une épaisseur optique (D1) de la première couche satisfait la relation 0,02? = D1 = 0,04?, une épaisseur optique (Dm) d'une cinquième couche comptée à partir de la couche la plus à l'extérieur du film antireflet satisfait la relation 0,19? = Dm = 0,75?, une épaisseur physique (dt) de l'intégralité du film antireflet satisfait la relation 350 nm = dt = 480 nm, et une somme (da) d'épaisseurs physiques des couches à indice de réfraction faible satisfait la relation 0,65 dt = da = 0,80 dt.

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