Optical element and optical apparatus
AssigneeCanon Kabushiki Kaisha
InventorKouichi Yonetani
Life of this patent
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Abstract
An optical element includes a first resin portion, a second resin portion provided in contact with the first resin portion, an adhesion portion, a first base material, and a second base material, the first resin portion, the second resin portion, and the adhesion portion being provided between the first base material and the second base material. The adhesion portion is in contact with the second resin portion and one of the first base material and the second base material. When an elastic modulus of the first resin portion is denoted by E1, an elastic modulus of the second resin portion is denoted by E2, and an elastic modulus of the adhesion portion is denoted by E3, the optical element satisfies a relationship of E3<E2<0.9×E1.
Claims17
An optical element comprising:
- a first base material;
- a second base material;
- a first resin portion provided between the first base material and the second base material;
- a second resin portion provided in contact with the first resin portion;
- and
- an adhesion portion being contacted with the second resin portion and one of the first base material and the second base material,
- wherein, when an elastic modulus of the first resin portion is denoted by E1, an elastic modulus of the second resin portion is denoted by E2, and an elastic modulus of the adhesion portion is denoted by E3, the optical element satisfies a relationship of E3<E2<0.9×E1.
A method for manufacturing an optical element including a first base material, a second base material, a first resin portion provided between the first base material and the second base material, a second resin portion in contact with the first resin portion, and an adhesion portion being contacted with the second resin portion and one of the first base material and the second base material, the method comprising:
- forming the first resin portion at the first base material;
- forming the second resin portion on the first resin portion;
- and
- providing an adhesive on at least one of the second resin portion and the second base material and forming an adhesion portion between the second resin portion and the second base material,
- wherein, when an elastic modulus of the first resin portion is denoted by E1, an elastic modulus of the second resin portion is denoted by E2, and an elastic modulus of the adhesion portion is denoted by E3, the optical element satisfying a relationship of E3<E2<0.9×E1 is obtained.
Dependencies are inferred from the claim text.