Optical element and method for manufacturing the same
A method for manufacturing an optical element includes the steps of: providing a first material including a precursor of a first energy curable resin which contains fine particles of a transparent conductive material on a transparent substrate, curing the first material by light irradiation, and performing a heat treatment on the cured first material. In the method described above, the cured first material processed by the heat treatment is again processed by light irradiation.
1. A diffractive optical element comprising:
a first substrate having a surface including a first region, and a second region that surrounds the first region;
a first member containing fine particles of a transparent conductive material provided on the first region;
a second member provided on the second region so as to contact with the first substrate, and on the first member so as to contact with the first member; and
a second substrate provided on the second member,
wherein at least a part of an interface where the first member and the second member contact has a diffraction grating shape, and
wherein the second member has an oxygen permeability of 2.0×10 −11 cm 3 ·cm·(cm 2 ·s·cmHg) −1 or less.
2. The diffractive optical element according to claim 1 ,
wherein the second member has an oxygen solubility of 1.4×10 −3 cm 3 ·(cm 2 ·cmHg) −1 or more, which is higher than that of the first member.
3. The diffractive optical element according to claim 1 ,
wherein the fine particles of the transparent conductive material have a number average particle diameter of 1 to 100 nm.
4. The diffractive optical element according to claim 1 ,
wherein a content of the fine particles of the transparent conductive material of the first member is 1 to 29 percent by volume with respect to a volume of the first member.
5. The diffractive optical element according to claim 1 ,
wherein the first member includes at least one of an acrylic resin, a vinyl resin, and an epoxy resin.
6. The diffractive optical element according to claim 1 ,
wherein when a refractive index of the first member is represented by nd 1 , an Abbe's number of the first member is represented by ν 1 , a refractive index of the second member is represented by nd 2 , and an Abbe's number of the second member is represented by ν 2 , nd 1 <nd 2 and ν 1 <ν 2 hold.
7. The diffractive optical element according to claim 1 ,
wherein the first substrate and the second substrate are glass substrates.
8. A diffractive optical element comprising:
a first substrate having a surface including a first region and a second region that surrounds the first region;
a first member containing fine particles of a transparent conductive material provided on the first region;
a second member provided on the first member so as to contact with the first member;
a third member provided on the second region so as to contact with the first member; and
a second substrate provided on the second member and the third member,
wherein at least a part of an interface where the first member and the second member contact has a diffraction grating shape,
wherein the third member has an oxygen permeability of 2.0×10 −11 cm 3 ·cm·(cm 2 ·s·cmHg) −1 or less, and
wherein the third member and the second member are in contact with each other.
9. The diffractive optical element according to claim 8 ,
wherein the second member has an oxygen solubility of 1.4×10 −3 cm 3 ·(cm 2 ·cmHg) −1 or more, which is higher than that of the first member.
10. The diffractive optical element according to claim 8 ,
wherein the transparent conductive material includes one of indium tin oxide, antimony-doped tin oxide, and zinc oxide.
11. The diffractive optical element according to claim 8 ,
wherein the fine particles of the transparent conductive material have a number average particle diameter of 1 to 100 nm.
12. The diffractive optical element according to claim 8 ,
wherein a content of the fine particles of the transparent conductive material of the first member is 1 to 29 percent by volume with respect to a volume of the first member.
13. The diffractive optical element according to claim 8 ,
wherein the first member includes at least one of an acrylic resin, a vinyl resin, and an epoxy resin.
14. The diffractive optical element according to claim 8 ,
wherein when a refractive index of the first member is represented by nd 1 , an Abbe's number of the first member is represented by ν 1 , a refractive index of the second member is represented by nd 2 , and an Abbe's number of the second member is represented by ν 2 , nd 1 <nd 2 and ν 1 <ν 2 hold.
15. The diffractive optical element according to claim 8 ,
wherein the first substrate and the second substrate are glass substrates.