US-20260126574-A1 - INDUCED TRANSMISSION FILTER

US20260126574A1US 20260126574 A1US20260126574 A1US 20260126574A1US-20260126574-A1

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.

Inventors

Georg J. Ockenfuss

Assignees

VIAVI SOLUTIONS INC.

Dates

Publication Date: 20260507
Application Date: 20251229

Claims (20)

1 . An optical filter, comprising: a first stack including alternating layers of a first dielectric material and a second dielectric material, the first dielectric material including niobium titanium oxide, and the second dielectric material being different from the first dielectric material; and a second stack including alternating layers of the first dielectric material, a third dielectric material, and a metal material, the third dielectric material being different from the second dielectric material and the first dielectric material, and the metal material including silver (Ag).
2 . The optical filter of claim 1 , where the second dielectric material includes silicon dioxide.
3 . The optical filter of claim 1 , where the third dielectric material includes zinc oxide.
4 . The optical filter of claim 1 , where the optical filter further includes: a third stack including alternating layers of the first dielectric material and the second dielectric material.
5 . The optical filter of claim 4 , where the second stack is between the first stack and the third stack.
6 . The optical filter of claim 1 , where the optical filter further includes a substrate.
7 . The optical filter of claim 6 , wherein the first stack is between the substrate and the second stack.
8 . The optical filter of claim 7 , wherein the substrate includes silicon nitride (Si 3 N 4 ).
9 . An optical filter, comprising: a first stack including a first dielectric material and a second dielectric material, the second dielectric material being different from the first dielectric material; and a second stack including one or more dielectric materials and a metal material, the one or more dielectric materials including one or more of niobium titanium oxide, silicon dioxide, or zinc oxide.
10 . The optical filter of claim 9 , where the one or more dielectric materials include: the first dielectric material, and a third dielectric material that is different from the second dielectric material and the first dielectric material.
11 . The optical filter of claim 10 , where the first dielectric material includes the niobium titanium oxide, and where the third dielectric material includes the zinc oxide.
12 . The optical filter of claim 10 , where the optical filter further includes: a third stack without the metal material.
13 . The optical filter of claim 12 , where the second stack is between the first stack and the third stack.
14 . The optical filter of claim 12 , where the third stack includes the first dielectric material and the second dielectric material.
15 . The optical filter of claim 12 , where the metal material includes silver (Ag).
16 . A filter, comprising: a first stack of first dielectric layers, the first dielectric layers including one or more of niobium titanium oxide, silicon dioxide, or zinc oxide; and a second stack of second dielectric layers and metal layers.
17 . The filter of claim 16 , where the first dielectric layers include alternating layers of a first dielectric material and a second dielectric material, and where the second dielectric material is different from the first dielectric material.
18 . The filter of claim 17 , where the first dielectric material includes the niobium titanium oxide, and where the second dielectric material includes the silicon dioxide.
19 . The filter of claim 17 , where the second dielectric layers include the first dielectric material.
20 . The filter of claim 16 , where the metal layers include silver (Ag).

Description

RELATED APPLICATIONS This application is a continuation of U.S. Patent Application No. 18/495,942, filed October 27, 2023, which is a continuation of U.S. Patent Application No. 17/663,265, filed May 13, 2022 (now U.S. Patent No. 11,828,963), which is a continuation of U.S. Patent Application No. 17/247,046, filed on November 25, 2020 (now U.S. Patent No. 11,340,391), which is a continuation of U.S. Patent Application No. 16/591,849, filed on October 3, 2019 (now U.S. Patent No. 10,866,347), which is a continuation of U.S. Patent Application No. 15/601,773, filed on May 22, 2017 (now U.S. Patent No. 10,451,783), the contents of which are incorporated herein by reference in their entireties. BACKGROUND An optical sensor device may be utilized to capture information. For example, the optical sensor device may capture information relating to a set of electromagnetic frequencies. The optical sensor device may include a set of sensor elements (e.g., optical sensors, spectral sensors, and/or image sensors) that capture the information. For example, an array of sensor elements may be utilized to capture information relating to multiple frequencies. In one example, an array of sensor elements may be utilized to capture information regarding a set of color bands of light, such as a first sensor element, of the sensor element array, capturing information regarding a red band of light; a second sensor element, of the sensor element array, capturing information regarding a green band of light; a third sensor element, of the sensor element array, capturing information regarding a blue band of light, or the like. A sensor element, of the sensor element array, may be associated with a filter. The filter may include a passband associated with a first spectral range of light that is passed to the sensor element. The filter may be associated with blocking a second spectral range of light from being passed to the sensor element. In one example, a sensor element array may be associated with a filter including different color passbands, such as a red passband, a blue passband, a green passband, or the like (e.g., a red-green-blue (RGB) filter). In other examples, a sensor element array be associated with a near infrared (NIR) blocking filter, an infrared (IR) blocking filter, a long wave pass (LWP) filter, a short wave pass (SWP) filter, a photopic filter, a tristimulus filter, or the like. SUMMARY According to some possible implementations, 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. According to some possible implementations, an induced transmission filter may include a first all-dielectric portion including a first set of dielectric layers. The induced transmission filter may include a second all-dielectric portion including a second set of dielectric layers. The induced transmission filter may include a metal/dielectric portion including a third set of dielectric layers and one or more metal layers. The metal/dielectric portion may be disposed between the first all-dielectric portion and the second all-dielectric portion. According to some possible implementations, a mixed metal/dielectric optical filter may include a substrate. The mixed metal/dielectric optical filter may include a first all-dielectric portion including alternating silicon dioxide layers and niobium titanium oxide layers. The mixed metal/dielectric optical filter may include a second all-dielectric portion including alternating silicon dioxide layers and niobium titanium oxide layers. The mixed metal/dielectric optical filter may include a metal/dielectric portion including one or more layer groups. A layer group, of the one or more layer groups, may include a silver layer, two zinc oxide layers, and two niobium titanium oxide layers. The silver layer may be disposed between the two zinc oxide layers. The two zinc oxide layers may be disposed between the two niobium titanium oxide layers. The metal/dielectric portion may be disposed between the first all-dielectric portion and the second all-dielectric portion. BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1A-1C are diagrams of an overview of an example implementation described herein