Cemented optical element, optical apparatus, and image pickup apparatus
A cemented optical element having a first optical component, a second optical component, and a third optical component that contains a resin and is sandwiched between the first optical component and the second optical component. The first optical component contains a resin and has a line unevenness structure on at least a part of a surface in contact with the third optical component. The fine unevenness structure is formed by a plurality of holes or columnar protrusions.
1 . A cemented optical element comprising:
a first optical component;
a second optical component; and
a third optical component that contains a resin and is sandwiched between the first optical component and the second optical component,
wherein the first optical component contains a resin and has a fine unevenness structure on at least a part of a surface in contact with the third optical component,
wherein the fine unevenness structure is formed by a plurality of holes or columnar protrusions, and
wherein each of the holes has a depth of 30 nm or more and 100 nm or less or each of the columnar protrusions has a height of 30 nm or more and 100 nm or less.
2 . The cemented optical element according to claim 1 , wherein the second optical component contains a resin and has a fine unevenness structure on at least a part of a surface in contact with the third optical component, wherein the fine unevenness structure is formed by a plurality of holes or columnar protrusions.
3 . The cemented optical element according to claim 1 , wherein the fine unevenness structure is formed with an average pitch of 300 nm or less.
4 . The cemented optical element according to claim 1 , wherein the fine unevenness structure is formed with an average pitch of 50 nm or more.
5 . The cemented optical element according to claim 1 , wherein a depth direction of the holes or a height direction of the columnar protrusions is parallel to a direction normal to an optical surface of the first optical component.
6 . The cemented optical element according to claim 1 , wherein the holes are column-shaped holes.
7 . The cemented optical element according to claim 1 , wherein the fine unevenness structure is a periodic structure.
8 . An optical apparatus comprising:
a housing; and
a cemented optical element provided inside the housing,
wherein the cemented optical element comprises:
a first optical component,
a second optical component, and
a third optical component that contains a resin and is sandwiched between the first optical component and the second optical component,
wherein the first optical component contains a resin and has a fine unevenness structure on at least a part of a surface in contact with the third optical component,
wherein the fine unevenness structure is formed by a plurality of holes or columnar protrusions, and
wherein each of the holes has a depth of 30 nm or more and 100 nm or less or each of the columnar protrusions has a height of 30 nm or more and 100 nm or less.
9 . An image pickup apparatus comprising:
an optical apparatus; and
an image pickup element that receives incident light through the optical apparatus,
wherein the optical apparatus comprises a housing and a cemented optical element provided inside the housing,
wherein the cemented optical element comprises a first optical component, a second optical component, and a third optical component that contains a resin and is sandwiched between the first optical component and the second optical component,
wherein the first optical component contains a resin and has a fine unevenness structure on at least a part of a surface in contact with the third optical component,
wherein the fine unevenness structure is formed by a plurality of holes or columnar protrusions, and
wherein each of the holes has a depth of 30 nm or more and 100 nm or less or each of the columnar protrusions has a height of 30 nm or more and 100 nm or less.