Antireflective member, optical element, display device,...

Details Antireflective member, optical element, display device,... Antireflective member, optical element, display device,...

2007-02-06

2010-11-16

Lavarias, Amel C (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S599000

Reexamination Certificate

active

07835080

ABSTRACT:
An antireflective member has an uneven surface pattern, in which unit structures are arranged in x and y directions at respective periods that are both shorter than the shortest wavelength of an incoming light ray, on the surface of a substrate and satisfies the following Inequality (1):Λ⁢⁢x,yλmin<1ni+ni·sin⁢⁢θ⁢⁢imax(1)where λminis the shortest wavelength of the incoming light ray, θimaxis the largest angle of incidence of the incoming light ray, ni is the refractive index of an incidence medium, Λx is the period of the uneven surface pattern in the x direction, and Λy is the period of the pattern in the y direction. As a result, diffraction of short-wave light components can be reduced in a broad wavelength range.

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