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US 2015/0029582 A1Published application
Infrared filter
AssigneeLargan Precision Co., Ltd.
InventorsChien-Pang CHANG, Kuo-Chiang CHU
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Abstract
An infrared filter includes a transparent substrate, and an infrared-filtering multilayer film. The infrared-filtering multilayer film is coated on the transparent substrate, and the infrared-filtering multilayer film includes a plurality of first dielectric layers and a plurality of silver layers. The first dielectric layers and the silver layers are alternately stacked, wherein the first dielectric layers are made of nitride.
Claims19
An infrared filter comprising
- a transparent substrate;
- and
- an infrared-filtering multilayer film, wherein the infrared-filtering multilayer film is coated on the transparent substrate, and the infrared-filtering multilayer film comprises:
- a plurality of first dielectric layers, and
- a plurality of silver layers;
- wherein the first dielectric layers and the silver layers are alternately stacked, and the first dielectric layers are made of nitride;
- wherein a total number of layers in the infrared-filtering multilayer film is TL, a total thickness of the infrared-filtering multilayer film is TT, a total number of the silver layers is AgL, and the following conditions are satisfied:
- 6≦TL≦42;
- 100 nm≦TT≦4000 nm;
- and
- 3≦AgL≦21.
8 more elements
Dependencies are inferred from the claim text.