Fujinon Corporation

Fujifilm Corporation

Minoru Taniyama

Kenichi Sato

Kazuya Yoneyama

When an optical image is formed through an imaging lens on an imaging surface that is convex toward a light incident side, the imaging lens is constructed in such a manner that a defocus MTF peak position at an arbitrary image height in a range of from 70% to 100% of a maximum image height of the optical image is located further in a light-traveling direction than a same kind of defocus MTF peak position on an optical axis of the imaging lens.

Imaging lens, imaging apparatus and information terminal apparatus

Disclosed are an imaging lens having a small size and high imaging performance, a camera module that is provided with the imaging lens and can obtain a high-resolution image signal, and an imaging apparatus. An imaging lens includes a first lens having a positive power, a second lens having a negative power, a third lens that has a positive power and includes a convex image-side surface, and a fourth lens that has a negative power and includes an object-side surface which is concave or flat near an optical axis. The first to fourth lenses are arranged in this order from an object side, and the imaging lens satisfies Conditional expression.

Imaging lens, camera module, and imaging apparatus

An imaging system is provided and includes an imaging lens and an imaging device such that the maximum diameter of an effective region of a point image covers three or more pixels of light receiving pixels, the point image being projected onto a light receiving surface through the imaging lens from an intended position. A signal processing unit executes restoration processing on first image data output from the imaging device, and the restoration processing is executed to generate second image data equivalent to the first image data output from the imaging device when the resolving power of the imaging lens is higher. The imaging lens has a first lens group having a positive power, and a second lens group having a positive power, in order from the object side.

Imaging system, imaging apparatus, portable terminal apparatus, onboard apparatus, medical apparatus and method of manufacturing the imaging system

An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a positive power; a second lens having a negative power; a third lens having a positive power and having a convex surface on an image side thereof; and a fourth lens having a negative power and having a concave surface or a flat surface on the object side and in a vicinity of an optical axis thereof, and the imaging lens satisfies conditional expression:0.28&#x3c;|4/|&#x3c;0.60 &#x2003;&#x2003;(1)where f is a focal length of the imaging lens, and f4 is a focal length of the fourth lens.

An imaging lens comprises, in order from an object side:

Imaging lens

An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a positive refractive power and having a convex surface on the object side; a second lens having a negative refractive power and having a concave surface on the object side; a third lens having a positive refractive power in the vicinity of an optical axis thereof; and a fourth lens of a meniscus lens having a negative refractive power and having a convex surface on the object side, the imaging lens satisfying the specific conditional expressions.

An imaging lens includes, in order from an object side, a first lens having a positive refractive power and having a meniscus shape with a convex surface directed to the object side thereof, a second lens having a concave object-side surface and a third lens having a negative refractive power in a vicinity of an optical axis. Each of the second and third lenses has at least one aspheric surface. The following conditional expressions are satisfied:0.8&#x3c;1/&#x3c;1.2&#x2003;&#x2003;(1)11&#x3c;|2/&#x2003;&#x2003;(2)0.04&#x3c;&#x3c;0.09&#x2003;&#x2003;(3)/2&#x3c;0.9&#x2003;&#x2003;(4)where

An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a convex surface on the object side and having a positive power; a second lens having a concave surface on the object side and having a negative power; a third lens having a positive power; and a fourth lens having a convex surface on the object side near a paraxial axis and having a meniscus shape. The imaging lens satisfies conditional expressions as specified.

An imaging lens comprises, in order from an object side: a first lens having a positive refractive power and a meniscus shape and having a convex surface directed to the object side; a second lens having a negative refractive power in the vicinity of an optical axis of the imaging lens; and a third lens having a positive refractive power in the vicinity of the optical axis, wherein at least one surface of each of the second lens and the third lens is an aspheric surface; and the imaging lens satisfies the following conditional expression expressions: 0.7 &#x3c;If/fl &#x3c;0.8 . . . (1) 0.3&#x3c;1f/fl &#x3c;0.8 . . . (2) 7.5 &#x3c;vd&#x3c;96 . . .(3) TL/Y &#x3c;0.9 . . . (4) where f: focal length of the imaging lens; f: focal length of the first lens; f: focal length of the second lens; vd: Abbe number of the first lens for the d-line; TL: length between the object-side surface of the first lens to an image forming position of the imaging lens; and Y: maximum image height.

Imaging lens, camera module, and portable terminal apparatus

An imaging lens is provided and includes: in order from an object side of the imaging lens, an aperture diaphragm; a first lens having a positive refractive power and having a convex surface on the object side; a second lens having a negative refractive power and having a concave surface on the object side; and a third lens having a meniscus shape having a convex surface on the object side in the vicinity of an optical axis thereof, each of the first lens, the second lens and the third lens having at least one aspherical surface, and the imaging lens satisfying the following conditional expressions.0.9&#x3c;|2/&#x2003;&#x2003;(1)1.2&#x3c;|3/&#x2003;&#x2003;(2)f represents a focal length of the imaging lens; frepresents a focal length of the second lens; and frepresents a focal length of the third lens.

An imaging lens includes first to third lenses Gto Garranged in order from a object side. The first lens has a biconvex shape in a vicinity of an optical axis Z. The second lens has a concave surface facing a object side. The second lens has a negative refractive power. The third lens has a positive or negative refractive power and has a meniscus shape containing, in a vicinity of the optical axis, a convex surface facing the object side. The following conditional expression is satisfied:0.7&#x3c;1/&#x3c;1.30.2&#x2266;2/&#x3c;0.5where f denotes a focal length of the entire system of the imaging lens, fdenotes a focal length of the first lens Gand Ddenotes an interval on the optical axis Zbetween the first lens Gand the second lens G

An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a convex surface on the object side and having a positive power; a second lens having a concave surface on the object side and having a negative power; a third lens having a positive power; and a fourth lens having a convex surface on the object side near a paraxial axis and having a meniscus shape. The imaging lens satisfies conditional expressions specified in the specification.

There is provided an imaging lens including a first lens having a positive refracting power, a second lens having a concave surface on an object side and having a negative refracting power, and a third lens having a positive refractive power and a meniscus shape having a convex surface on the object side and at a vicinity of an optical axis, in order from the object side. The imaging lens satisfies conditional equations below. f designates a focal length of the total system, fdesignates a focal length of the first lens, Ddesignates an interval between the first lens and a second lens on an optical axis, &#x3bd;designates an average of Abbe numbers of the first lens, the second lens and the third lens, and &#x3bd;designates the Abbe number of the second lens.0.7&#x3c;1/&#x3c;1.3&#x2003;&#x2003;(1)0.25&#x3c;2/&#x3c;0.50&#x2003;&#x2003;(2)55&#x3c;&#x3bd;123&#x2003;&#x2003;(3)|&#x3bd;123&#x2212;&#x3bd;2|&#x3c;5&#x2003;&#x2003;(4)

An imaging lens is provided and includes: in order from an object side of the imaging lens, a first lens having a convex surface directed to the object side on an optical axis and having a positive power; an aperture diaphragm placed between a top position of an object-side surface of the first lens and a position of an image-side surface of the first lens on the optical axis; a second lens having a meniscus shape with a concave surface directed to the object side on the optical axis; and a third lens having a meniscus shape with a convex surface directed to the object side on the optical axis. Further, the imaging lens satisfies specific conditional expressions.

An imaging lens is provided and includes: in order from the object side, a first lens having a convex surface on the object side and having a positive power; an aperture diaphragm; a second lens having a concave surface on the object side and having a negative power; a third lens having a positive power; and a fourth lens having a convex surface on the object side near the optical axis, the fourth lens having a meniscus shape. The imaging lens satisfies conditional expressions:0.2&#x3c;&#x3c;0.4 &#x2003;&#x2003;(1)&#x3c;1.3 &#x2003;&#x2003;(2)where f represents a focal distance of the imaging lens; Drepresents an air interval between the first lens and second lens along an optical axis of the imaging lens; and TL represents a distance (along the optical axis) from an object-side surface of the first lens to an image forming surface.

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Saitama, Japan

Minoru Taniyama