IMAGING LENS AND IMAGING APPARATUS EQUIPPED WITH THE IMAGING LENS
First Claim
Patent Images
1. An imaging lens consisting essentially of six lenses, including:
- a first lens of a biconvex shape;
a second lens having a negative refractive power and is of a meniscus shape with a concave surface toward the image side;
a third lens of a meniscus shape with a convex surface toward the object side;
a fourth lens of a meniscus shape with a concave surface toward the object side;
a fifth lens having a positive refractive power; and
a sixth lens having a negative refractive power and a concave surface toward the image side, provided in this order from the object side.
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Abstract
An imaging lens is constituted essentially by six lenses, including: a first lens of a biconvex shape; a second lens having a negative refractive power and is of a meniscus shape with a concave surface toward the image side; a third lens of a meniscus shape with a convex surface toward the object side; a fourth lens of a meniscus shape with a concave surface toward the object side; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power and a concave surface toward the image side, provided in this order from the object side.
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Citations
20 Claims
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1. An imaging lens consisting essentially of six lenses, including:
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a first lens of a biconvex shape; a second lens having a negative refractive power and is of a meniscus shape with a concave surface toward the image side; a third lens of a meniscus shape with a convex surface toward the object side; a fourth lens of a meniscus shape with a concave surface toward the object side; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power and a concave surface toward the image side, provided in this order from the object side. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19, 20)
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2. An imaging lens consisting essentially of six lenses, including:
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a first lens having a positive refractive power and a convex surface toward the object side; a second lens having a negative refractive power and is of a meniscus shape with a concave surface toward the image side; a third lens of a meniscus shape with a convex surface toward the object side; a fourth lens; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power and a concave surface toward the image side, provided in this order from the object side; the imaging lens satisfying the conditional formulae below;
f/f56<
0
(1)
0.7<
DDL/f<
0.98
(2)wherein f56 is the combined focal length of the fifth lens and the sixth lens, f is the focal length of the entire system, and DDL is the distance from the surface of the first lens toward the object side and the surface of the sixth lens toward the image side along the optical axis. - View Dependent Claims (12, 13)
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3. An imaging lens consisting essentially of six lenses, including:
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a first lens having a positive refractive power and a convex surface toward the object side; a second lens having a negative refractive power and a concave surface toward the image side; a third lens of a meniscus shape with a convex surface toward the object side; a fourth lens having a positive refractive power; a fifth lens having a positive refractive power; and a sixth lens having a negative refractive power and a concave surface toward the image side, provided in this order from the object side; the imaging lens satisfying the conditional formulae below;
f/f56<
0
(1)
0.7<
DDL/f<
0.98
(2)wherein f56 is the combined focal length of the fifth lens and the sixth lens, f is the focal length of the entire system, and DDL is the distance from the surface of the first lens toward the object side and the surface of the sixth lens toward the image side along the optical axis.
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Specification