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US 12,044,838 B2Granted
Laminated lens array, endoscope and image pickup unit
AssigneeOlympus Corporation
InventorsMasahiko Murayama, Takuto Yoshinaga
Life of this patent
Estimating the term…
Abstract
There is provided a laminated lens array in which a first lens element arranged on a distal end side and a second lens element arranged on a proximal end side are stuck and laminated in a lamination direction, wherein outer faces of a laminated body including the first lens element and the second lens element are located in the lamination direction and have concaves formed being recessed toward a center of the laminated body at least on parts of the outer faces in the lamination direction.
Claims14
A laminated lens array comprising:
- a first lens having a first lens body, the first lens body having a first face and a second face opposing the first face over a first thickness of the first lens body in a first center axis direction, each of the first face and the second face being configured to at least indirectly receive incident light,
- wherein the first lens body has at least one first concavity formed on a first outer side surface of the first lens body, the at least one first concavity is curved inwardly toward a first center axis of the first lens body, the first outer side surface connecting the first face and the second face at an outer periphery of the first lens body;
- and
- a second lens provided one of proximally or distally to the first lens in the first center axis direction, and
- wherein the at least one first concavity is formed along an entirety of the first outer side surface in the first center axis direction.
2 more elements
An endoscope comprising:
- an insertion portion having an objective optical system at a distal end portion of the insertion portion;
- a channel extending though the insertion portion and terminating at a distal end face of the distal end portion;
- and
- a laminated lens array disposed in the objective optical system, the laminated lens array comprising:
- a first lens having a first lens body, the first lens body having a first face and a second face opposing the first face over a first thickness of the first lens body in a first center axis direction, each of the first face and the second face being configured to at least indirectly receive incident light,
- a second lens provided one of proximally or distally to the first lens in the first center axis direction;
- and
- wherein the first lens body has at least one first concavity formed on a first outer side surface of the first lens body, the at least one first concavity is curved inwardly toward a first center axis of the first lens body, the first outer side surface connecting the first face and the second face at an outer periphery of the first lens body;
- and
- a portion of the channel is disposed in at least a portion of the at least one first concavity.
7 more elements
Dependencies are inferred from the claim text.