Induced transmission filter having plural groups of alternating layers of dielectric material for filtering light with less than a threshold angle shift
First Claim
1. An optical filter, comprising:
- a first group of layers,the first group of layers including alternating layers of a first dielectric material, of a group of dielectric materials, and a second dielectric material of the group of dielectric materials;
a second group of layers,the second group of layers including alternating layers of a third dielectric material, of the group of dielectric materials, and a fourth dielectric material of the group of dielectric materials; and
a third group of layers,the third group of layers including alternating layers of a fifth dielectric material, of the group of dielectric materials, a sixth dielectric material, of the group of dielectric materials, and a metal material,the third group of layers being disposed between the first group of layers and the second group of layers, andthe optical filter filtering light with less than a threshold angle shift and with greater than a threshold level of transmission.
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Accused Products
Abstract
An optical filter may include a first group of layers. The first group of layers may include alternating layers of a first dielectric material, of a group of dielectric materials, and a second dielectric material of the group of dielectric materials. The optical filter may include a second group of layers. The second group of layers may include alternating layers of a third dielectric material, of the group of dielectric materials, and a fourth dielectric material of the group of dielectric materials. The optical filter may include a third group of layers. The third group of layers may include alternating layers of a fifth dielectric material, of the group of dielectric materials, a sixth dielectric material, of the group of dielectric materials, and a metal material. The third group of layers may be disposed between the first group of layers and the second group of layers.
12 Citations
20 Claims
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1. An optical filter, comprising:
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a first group of layers, the first group of layers including alternating layers of a first dielectric material, of a group of dielectric materials, and a second dielectric material of the group of dielectric materials; a second group of layers, the second group of layers including alternating layers of a third dielectric material, of the group of dielectric materials, and a fourth dielectric material of the group of dielectric materials; and a third group of layers, the third group of layers including alternating layers of a fifth dielectric material, of the group of dielectric materials, a sixth dielectric material, of the group of dielectric materials, and a metal material, the third group of layers being disposed between the first group of layers and the second group of layers, and the optical filter filtering light with less than a threshold angle shift and with greater than a threshold level of transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An induced transmission filter, comprising:
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a first all-dielectric portion including a first set of dielectric layers; a second all-dielectric portion including a second set of dielectric layers; and a metal/dielectric portion including a third set of dielectric layers and one or more metal layers, the metal/dielectric portion being disposed between the first all-dielectric portion and the second all-dielectric portion, and the induced transmission filter filtering light with less than a threshold angle shift and with greater than a threshold level of transmission. - View Dependent Claims (16, 17, 18)
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19. A mixed metal/dielectric optical filter, comprising:
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a substrate; a first all-dielectric portion including alternating silicon dioxide layers and niobium titanium oxide layers; a second all-dielectric portion including alternating silicon dioxide layers and niobium titanium oxide layers; and a metal/dielectric portion including one or more layer groups, a layer group, of the one or more layer groups, including a silver layer, two zinc oxide layers, and two niobium titanium oxide layers, the silver layer being disposed between the two zinc oxide layers, the two zinc oxide layers being disposed between the two niobium titanium oxide layers, the metal/dielectric portion being disposed between the first all-dielectric portion and the second all-dielectric portion. - View Dependent Claims (20)
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Specification