OPTICAL FILTER
First Claim
1. An optical filter comprising:
- a substrate;
a plurality of contiguous identical lower filter cavities formed on the substrate;
each of the lower filter cavities consisting of two high refractive index layers and one low refractive index layer sandwiched between the high refractive index layers and a plurality of contiguous upper filter cavities formed on the lower filter cavities;
each of the upper filter cavities consisting of two low refractive index layers and one high refractive index layer sandwiched between the low refractive index layers.
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Accused Products
Abstract
An optical filter (100) includes a substrate (110), a number of contiguous identical lower filter cavities (120) formed on the substrate and a number of contiguous upper filter cavities (130) formed on the lower filter cavities. Each of the lower filter cavities consists of two high refractive index layers (121) and one low refractive index layer (122) sandwiched between the high refractive index layers. Each of the upper filter cavities consists of two low refractive index layers (132) and one high refractive index layer (131) sandwiched between the low refractive index layers. The present invention calculates optimal thicknesses for each layer, so that can shield infrared and ultra violet radiation precisely.
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Citations
10 Claims
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1. An optical filter comprising:
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a substrate;
a plurality of contiguous identical lower filter cavities formed on the substrate;
each of the lower filter cavities consisting of two high refractive index layers and one low refractive index layer sandwiched between the high refractive index layers anda plurality of contiguous upper filter cavities formed on the lower filter cavities;
each of the upper filter cavities consisting of two low refractive index layers and one high refractive index layer sandwiched between the low refractive index layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification