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US 2003/0198818 A1Published application
Optical element having antireflection film
AssigneeHoya Corporation
InventorsTakeshi Mitsuishi, Hiroshi Shirakawa, Kenichi Shinde
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AssigneeHoya Corporation
InventorsTakeshi Mitsuishi, Hiroshi Shirakawa, Kenichi Shinde
Estimating the term…
The present invention is directed to an optical element having an antireflection film formed on a plastic substrate, wherein the reflectance of the antireflection film is low while the transmittance thereof is high. The impact resistance, the adhesiveness, the heat resistance, the abrasion resistance and the alkali resistance of the antireflection film on the plastic substrate are superior. The optical element having an antireflection film has at least one layer of the antireflection film that is a hybrid layer made of an inorganic substance and an organic substance.
An optical element comprising a plastic substrate and an antireflection film, wherein at least one layer of the antireflection film is a hybrid layer comprising at least one inorganic substance and at least one organic substance.
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Anti-reflection coatings: using layers comprising organic materials
Two dimensionally sectional layer: with frame, casing, or perimeter structure
Of asbestos: as siloxane, silicone or silane
Optical elements, systems or apparatus
Term end not estimated
The present application claims priority under 35 U.S.C. § 119 of Japanese Application No. 2001-327252, filed Oct. 25, 2001, the disclosure of which is expressly incorporated by reference herein in its entirety.
1. Field of the Invention
The present invention relates to optical elements having an antireflection film, and to those having an antireflection film formed on a plastic substrate. The luminous reflectance of the antireflection film is low while the luminous transmittance thereof is high. The impact resistance, the adhesiveness, the heat resistance, the abrasion resistance and the alkali resistance on the plastic substrate are superior in optical elements of the invention, and the productivity is good.
The invention is described in more detail with reference to the following Examples, which, however, are not intended to restrict the invention.
The physical properties of the optical elements obtained in the following Examples and Comparative Examples were measured according to the methods mentioned below.
(1) Luminous Transmittance: