IMAGE PICKUP LENS, IMAGE PICKUP APPARATUS, MOBILE TERMINAL, AND METHOD FOR MANUFACTURING IMAGE PICKUP LENS
First Claim
1. An image pickup lens comprising:
- at least three lens blocks each comprisinga lens substrate being a parallel flat plate, anda lens or lenses, having a positive or negative power, being connected to at least one of an object-side surface and an image-side surface of the lens substrate,wherein the lens or lenses included in each of the lens blocks, is formed of a different material from the lens substrate,a first lens block which is one of the lens blocks arranged at a closest position to an object side, has a positive power,a second lens block which is another of the lens blocks arranged at an image side of the first lens block has a negative power, andthe image pickup lens satisfies the following expression (G1);
0.7<
f[BK1]/f[all]<
1.0
(G1)where f[BK1] is a composite focal length of the first lens block, andf[all] is a composite focal length of a total system of the image pickup lens.
1 Assignment
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Accused Products
Abstract
Disclosed is an image pickup lens (LN) including at least three lens blocks (BK) each equipped with a lens substrate (LS) being a parallel flat plate, and a lens or lenses (L) having a positive or negative power and being connected to at least one of an object-side surface and an image-side surface of the lens substrate (LS). In the image pickup lens (LN), a first lens block (BK1) arranged at a closest position to an object side has a positive powder, a second lens block (BK2) arranged at an image side of the first lens block (BK1) has s negative power, and predetermined conditional expressions are satisfied, whereby the image pickup lens capable of being easily produced at a low cost and having a high performance and a compact size can be provided.
19 Citations
18 Claims
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1. An image pickup lens comprising:
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at least three lens blocks each comprising a lens substrate being a parallel flat plate, and a lens or lenses, having a positive or negative power, being connected to at least one of an object-side surface and an image-side surface of the lens substrate, wherein the lens or lenses included in each of the lens blocks, is formed of a different material from the lens substrate, a first lens block which is one of the lens blocks arranged at a closest position to an object side, has a positive power, a second lens block which is another of the lens blocks arranged at an image side of the first lens block has a negative power, and the image pickup lens satisfies the following expression (G1);
0.7<
f[BK1]/f[all]<
1.0
(G1)where f[BK1] is a composite focal length of the first lens block, and f[all] is a composite focal length of a total system of the image pickup lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification