Konica Minolta Opto, Inc.

Yusuke Hirao

Keiji Matsusaka

Yasunari Fukuta

An imaging lens (LN) of an imaging device (ID) is composed of an aperture stop (ST) and a lens unit (LU) having positive power. Even when the object side surface of the lens unit (LU) has a shape convexed to the side of the object, and a lens whose image side surface is concaved to the image side is used, excellent aberration performance with a short optical total length, a small sensor incidence angle and a small distortion are achieved at low cost.

Imaging lens, image pickup device and portable terminal

A lens unit LU in which a lens portion L is formed at least on either a light-receiving surface or a light-emitting surface of a lens holding plate P, wherein a difference in coefficients of linear expansion of the lens holding plate P and the lens portion L is used to suppress mis-focusing by causing changes in a paraxial image point position of the entire lens system due to changes in the surface shape of the lens portion L which accompany temperature changes, and changes in the paraxial image point position of the entire lens system due to changes in the refraction index to cancel each other out. Furthermore, deterioration of performance of the entire lens system caused by rising temperature is suppressed by satisfying a predetermined conditional expression.

Lens unit, image capturing lens, image capturing device and portable terminal

Provided are a wafer scale lens, which is so short in an optical total length with respect to an image height that it can correct an aberration satisfactory, and an optical system including the wafer scale lens and having a thin lens element on the side closest to the image. The optical system includes a first lens having a positive refractive power relative to an object, and a second lens arranged on the side of the image of the first lens and having a recessed shape on the side of the object. At least one lens is arranged on the side of the second lens. When that one of the lenses arranged on the side of the image of the second lens, which is arranged on the side closest to the image, is an i-th lens (i&#x3e;3), this i-th lens includes an i-th lens flat plate and is formed on the object side of the i-th lens flat plate but has a refractive index different from that of the i-th lens flat plate, and a lens element having a convex shape on the object side where the main light ray of the maximum image height passes. Moreover, the ratio between the optical axial distance (or the lens distance) between a (i&#x2212;1)-th lens and the i-th lens and the optical axis distance (or the optical total length) from the object side face of the first lens to the image face is 0.01 to 0.15.

Imaging lens, imaging device, and mobile terminal

An imaging lens (LN) includes at least one lens block (BK), and an aperture stop (ape). The lens block (BK) includes parallel flat lens substrates (LS) formed of different materials, and a lens (L). In the imaging lens (LN), a first lens block (BK) positioned closest to an object includes a first lens substrate (LS) and a lens (L[LS], and a prescribed conditional expression is satisfied.

Imaging lens, imaging device, portable terminal, and method for manufacturing imaging lens

An imaging lens (LN) includes at least one lens block (BK), and an aperture stop (ape). The lens block (BK) includes a plane-parallel lens substrate (LS) and a lens (L) formed of different materials. In the imaging lens (LN), a first lens block (BK) disposed at the most object-side exerts a positive optical power, and said at least one lens block is contiguous only with one of the object-side and image-side substrate surfaces of the lens substrate (LS).

An imaging lens (LN) includes one or two lens blocks (BK), and an aperture stop (ape). The lens block (BK) includes a plane-parallel lens substrate (LS) and a lens (L) formed of different materials. In the imaging lens (LN), a first lens block (BK1) disposed at the most object-side exerts a positive optical power, and a conditional formula defined by the absolute difference between the index of refraction of a first lens substrate (LS1) and the index of refraction of a lens (L[LS1]) contiguous with an object-side substrate surface of the first lens substrate (LS) is fulfilled.

An imaging lens (LN) includes at least three lens blocks (BK), and an aperture stop (ape). The lens block (BK) includes parallel flat lens substrates (LS) formed of different materials, and a lens (L). In the imaging lens (LN), the object side lens surface of a first lens (L) included in a first lens block (BK) is a surface protruding to the object side, the object side lens surface of a third lens (L) included in a second lens block (BK) is a surface recessed from the object side, and at least the object side lens surface of a fifth lens (L) or the object side lens surface of a sixth lens (L) included in a third lens block (BK) is aspherical.

An imaging lens (LN) includes one or two lens blocks (BK), and an aperture stop (ape). The lens block (BK) includes a plane-parallel lens substrate (LS) and a lens (L) formed of different materials. In the imaging lens (LN), a first lens block (BK) disposed at the most object-side exerts a positive optical power, and a conditional formula defined by the absolute difference between the index of refraction of a first lens substrate (LS) and the index of refraction of a lens (L[LSo]) contiguous with an object-side substrate surface of the first lens substrate (LS) is fulfilled.

The present invention provides an image pickup lens, an image pickup apparatus, and a mobile terminal The image pickup lens includes a lens group. The lens group includes a lens substrate which is a parallel flat plate, and lenses are formed on an object side surface and image side surface of the lens substrate, where a lens with a positive refractive power formed on the lens substrate has an Abbe number of vp and a lens with a negative refractive power formed on the lens substrate has an Abbe number of vn. The difference between the Abbe number vp and the Abbe number of vn satisfies 10&#x3c;|vp&#x2212;vn|.

Image pickup lens, image pickup apparatus and mobile terminal

Provided is an imaging lens, including, in order from an object side: a positive first lens; a second lens having a concave shape toward the object side; and (i&#x2212;2) number of lens, wherein the i-th lens, which is the most image-side lens, includes: an i-th lens flat plate; and a positive or negative lens element on at least one of the opposite surfaces of the i-th lens flat plate, wherein the following conditional relationship is satisfied: 0.9&#x3e;Y/Y&#x3e;0.61, where: Yis a height of the most off-axial ray on an image-side surface of the (i&#x2212;1)th lens; and Y is a maximum image height.

An imaging lens (LN) includes at least one lens block (BK), and an aperture stop (ape). The lens block (BK) includes parallel flat lens substrates (LS) formed of different materials, and a lens (L). In the imaging lens (LN), a first lens block (BK) positioned closest to an object includes a first lens substrate (LS) and a lens (L[LSo], and a prescribed conditional expression is satisfied.

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Sakai, Japan

Yusuke Hirao