| 摘要 |
An optical component includes an antireflection film that is a multilayer film having alternately-laminated six or more layers including high refractive index layers and low refractive index layers; wherein a first layer of the antireflection film deposited closest to the substrate is a high refractive index layer; λ satisfies 480 nm≦̸λ≦̸530 nm where λ is the wavelength of light incident into the antireflection film; an optical thickness D1 of the first layer satisfies 0.02λ≦̸D1≦̸0.04λ; 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 0.19λ≦̸Dm≦̸0.75λ; a total physical thickness dt of the entire antireflection film satisfies 350 nm≦̸dt≦̸480 nm; and a total physical thickness da of the low refractive index layers satisfies 0.65 dt≦̸da≦̸0.80 dt.
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