Imaging lens unit and camera module
AssigneeHitachi Maxell, Ltd.
InventorsMasaki Nakanishi, Yoshiaki Minakawa
Life of this patent
Estimating the term…
Abstract
An imaging lens unit includes, from an object side, a diaphragm, a first lens, and a second lens placed on an image side of the first lens. The first lens is a positive meniscus lens convex toward the object side, and at least one side of the first lens has an aspherical surface. The second lens is a meniscus lens convex toward the image side, and at least one side of the second lens has an aspherical surface. Further, a maximum value of an angle between a tangent to a surface on the image side of the second lens and a normal to an optical axis is in a range of 65° to 90° within an effective diameter of the second lens.
Claims11
An imaging lens unit comprising, from an object side:
- a diaphragm;
- a first lens being a positive meniscus lens convex toward the object side, at least one side of the first lens having an aspherical surface;
- and
- a second lens placed on an image side of the first lens, the second lens being a meniscus lens convex toward the image side, at least one side of the second lens having an aspherical surface, wherein
- a maximum value of an angle between a tangent to a surface on the image side of the second lens and a normal to an optical axis is in a range of 65° to 90° within an effective diameter of the second lens.
Dependencies are inferred from the claim text.