Laminated lens structure, camera module, and method for manufacturing laminated lens structure
To prevent the resin from oozing out during the lens molding due to the capillary action. A laminated lens structure according to the present disclosure includes: a plurality of lens structures including a substrate provided with an opening part, a lens inserted into the opening part to be fixed to the substrate, and a recessed part provided at an area in which a lateral face of the opening part and a surface of the substrate are intersected, and recessed more than the surface of the substrate. The lenses are arrayed in an optical axis direction by the substrates being joined. This configuration makes it possible to prevent the resin from oozing out during the lens molding due to the capillary action.
1. A laminated lens structure, comprising:
a plurality of lens structures, each lens structure including:
a substrate provided with an opening part,
a lens inserted into the opening part to be fixed to the substrate, and
a recessed part provided at an area in which a lateral face of the opening part and a surface of the substrate are intersected, and recessed more than the surface of the substrate,
wherein the lenses are arrayed in an optical axis direction by each of the substrates of the plurality of lens structures being joined,
wherein the lateral face of the opening part of the substrate is formed as a tapered surface,
wherein at least one of the substrates of the plurality of lens structures is arranged so that the tapered surface faces downward, and
wherein a remainder of the substrates of the plurality of lens structures are arranged so that the tapered surface faces upward.
2. The laminated lens structure according to claim 1 , wherein the recessed part is provided at an edge of the opening part.
3. The laminated lens structure according to claim 1 , wherein the recessed part includes a first face that is parallel to the surface of the substrate, and lower than the surface of the substrate, and a second face that connects the surface of the substrate to the first face.
4. The laminated lens structure according to claim 3 , wherein the second face is a slope having a predetermined angle to the surface of the substrate.
5. The laminated lens structure according to claim 3 , wherein the second face is a face perpendicular to the surface of the substrate.
6. The laminated lens structure according to claim 1 , wherein the recessed part includes a slope having a predetermined angle to the surface of the substrate.
7. The laminated lens structure according to claim 1 , wherein the recessed part is formed in a groove shape on the surface of the substrate.
8. The laminated lens structure according to claim 1 , wherein the recessed part includes a curved surface recessed with respect to the surface of the substrate.
9. The laminated lens structure according to claim 1 , wherein the recessed part includes an acute incision formed on the surface of the substrate.
10. The laminated lens structure according to claim 1 , wherein an alignment mark that serves as positioning upon lamination of the substrate is formed on the surface of the substrate.
11. The laminated lens structure according to claim 1 ,
wherein the substrate corresponding to one lens is configured by lamination of a plurality of unit substrates, and
the opening part that is formed in the unit substrate located on one surface side of the substrate is larger than the unit substrate located on the other surface side of the substrate.
12. A camera module, comprising:
a laminated lens structure including:
a plurality of lens structures, each lens structure including:
a substrate provided with an opening part,
a lens inserted into the opening part to be fixed to the substrate, and
a recessed part provided at an area in which a lateral face of the opening part and a surface of the substrate are intersected, and recessed more than the surface of the substrate,
wherein the lenses are arrayed in an optical axis direction by each of the substrates of the plurality of lens structures being joined,
wherein the lateral face of the opening part of the substrate is formed as a tapered surface,
wherein at least one of the substrates of the plurality of lens structures is arranged so that the tapered surface faces downward, and
wherein a remainder of the substrates of the plurality of lens structures are arranged so that the tapered surface faces upward; and
an imaging element having an imaging surface on which an object image is formed by the lens of the laminated lens structure.
13. A method of manufacturing a laminated lens structure, having a plurality of lens structures with each lens structure including a substrate, comprising:
a step of sealing an opening part by inserting a first mold from a side, not provided with a recessed part, into the opening part of the substrate of the plurality of lens structures having the opening part, wherein the substrate is provided with the recessed part that is recessed more than a surface of the substrate at an area in which a lateral face of the opening part and the surface of the substrate are intersected;
a step of filling a resin in the opening part;
a step of pressing a second mold against the resin by inserting the second mold from a side provided with the recessed part into the opening part;
a step of hardening the resin,
wherein the lateral face of the opening part of the substrate is formed as a tapered surface, and
a step of joining each of the substrates of the plurality of lens structures in a vertical direction,
wherein at least one of the substrates of the plurality of lens structures is arranged so that the tapered surface faces downward, and
wherein a remainder of the substrates of the plurality of lens structures are arranged so that the tapered surface faces upward.
14. The camera module according to claim 12 , wherein the recessed part is provided at an edge of the opening part.
15. The camera module according to claim 12 , wherein the recessed part includes a first face that is parallel to the surface of the substrate, and lower than the surface of the substrate, and a second face that connects the surface of the substrate to the first face.
16. The camera module according to claim 15 , wherein the second face is a slope having a predetermined angle to the surface of the substrate.
17. The camera module according to claim 15 , wherein the second face is a face perpendicular to the surface of the substrate.
18. The camera module according to claim 12 , wherein the recessed part includes a slope having a predetermined angle to the surface of the substrate.
19. The camera module according to claim 12 , wherein the recessed part is formed in a groove shape on the surface of the substrate.
20. The camera module according to claim 12 , wherein the recessed part includes a curved surface recessed with respect to the surface of the substrate.