US Patent 8481148 Optical device and antireflection film

Patent 8481148 was granted and assigned to Hoya on July, 2013 by the United States Patent and Trademark Office.

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US Patent 11852848 Imaging lens assembly, camera module and electronic device

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Patent abstract

An antireflection film is formed by alternately laminating a low refractive index layer and a high refractive index layer. The antireflection film has a reflectance of 10% or less and an excitation purity range of 10 or less for visible light in a wavelength range from 380 nm to 780 nm incident at an incident angle ranging from 0° to 45° when regarding the direction perpendicular to the surface as 0°. The antireflection film inhibits a specific color tone from occurring in interference color of incident light coming from an oblique direction.

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Kazuo Kawamata0

Makoto Adachi0

Tsuneo Muraki0

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