Antireflection film and optical element having same

Details Antireflection film and optical element having same Antireflection film and optical element having same

2011-04-12

2011-04-12

Nguyen, Thong (Department: 2872)

Optical: systems and elements

Having significant infrared or ultraviolet property

Multilayer filter or multilayer reflector

C359S586000, C359S587000

Reexamination Certificate

active

07924501

ABSTRACT:
An antireflection film includes a first layer, a second layer, a third layer, a fourth layer, a fifth layer, a sixth layer, and a seventh layer. Each of the first, third, fifth, and seventh layer is formed using a low refractive index material. Each of the second, fourth, and sixth layer is formed using a high refractive index material. The thicknesses of the first, second, third, fourth, fifth, sixth, and seventh layers are in ranges of 0.122d1to 3.052d1, 0.267d2to 0.370d2, 0.427d3to 0.610d3, 0.760d4to 0.924d4, 0.305d5to 0.378d5, 0.575d6to 0.718d6, and 1.160d7to 1.342d7, correspondingly, wherein di=λ/(4×ni), (i=1, 2, . . . 7), niis a refractive index of the i-th layer, and λ is a reference wavelength of incident light entered into the antireflection film.

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