Wafer level optical elements and applications thereof
View Patent ↗A wafer level lens includes a first lens structure of a first polymeric material coupled to a second lens structure of a second polymeric material, wherein an interface is formed by opposing surfaces of the first lens structure and the second lens structure, the opposing surfaces having no air gap therebetween, at least one aperture disposed between the first lens structure and the second lens structure, wherein the aperture contacts the first lens structure and the second lens structure and wherein a supporting substrate is not positioned between the first lens structure and the second lens structure, and a spacer coupled to and separate from the wafer level lens.
1. An optical element, comprising:
a wafer level lens comprising a first lens structure of a first polymeric material coupled to a second lens structure of a second polymeric material, wherein a planar interface is formed by opposing surfaces of centers of the first lens structure and the second lens structure, the opposing surfaces having no air gap therebetween;
at least one aperture disposed between the first lens structure and the second lens structure, wherein the at least one aperture contacts the first lens structure and the second lens structure and wherein a supporting substrate is not positioned between the first lens structure and the second lens structure, the at least one aperture having a first surface, orthogonal to a light transmission path of the optical element, that contacts the first polymeric material throughout the optical element, a second surface, opposite the first surface, that contacts the second polymeric material throughout the optical element, and a third surface, connecting the first and second surfaces, that contacts at least one of the first and second polymeric materials; and
a spacer coupled to and separate from the wafer level lens.
2. The optical element of claim 1 , wherein the first polymeric material of the first lens structure and the second polymeric material of the second lens structure are the same.
3. The optical element of claim 1 , wherein the first polymeric material of the first lens structure and the second polymeric material of the second lens structure are different.
4. The optical element of claim 1 , wherein the at least one aperture comprises a metal or a polymeric resist.
5. The optical element of claim 1 further comprising one or more baffle structures.
6. The optical element of claim 1 , wherein the first lens structure and the second lens structure have substantially the same coefficient of thermal expansion (CTE).
7. The optical element of claim 1 , wherein the first lens structure, second lens structure and spacer have substantially the same CTE.
8. The optical element of claim 1 , wherein a non-supporting substrate is disposed between the opposing surfaces of the first lens structure and the second lens structure.
9. The optical element of claim 1 , wherein the interface is non-planar.
10. The optical element of claim 1 , wherein the spacer provides mechanical support to the wafer level lens.
11. The optical element of claim 1 , wherein the first and second lens structures include first and second lens surfaces, respectively, on surfaces opposite the interface.
12. The optical element of claim 1 , wherein, beneath the spacer, the aperture contacts the first polymeric material and the second polymeric material.
13. The optical element of claim 12 , wherein the at least one aperture is surrounded on three sides by the first and second polymeric materials.
14. An optical element, comprising:
a wafer level lens comprising a first lens structure of a first polymeric material coupled to a second lens structure of a second polymeric material, wherein planar interface is formed by opposing surfaces of centers of the first lens structure and the second lens structure; and
at least one aperture disposed between the first lens structure and the second lens structure, wherein the at least one aperture has a first surface, orthogonal to a light transmission path of the optical element, that contacts a first material throughout the optical element, a second surface, opposite the first surface, that contacts a second material throughout the optical element, and a third surface, connecting the first and second surfaces, that contacts at least one of the first and second materials.
15. The optical element of claim 14 , wherein the first material is the first polymeric material and the second material is the second polymeric material.
16. The optical element of claim 14 , wherein the first material is the first polymeric material and the second material is a non-supporting material.
17. The optical element of claim 14 , wherein the first material is a non-supporting material and the second material is the second polymeric material.
18. The optical element of claim 14 , wherein the at least one aperture is surrounded on three sides by the first and second materials.