Konica Minolta Opto, Inc.

Konica Minolta Advanced Layers, Inc.

Konica Minolta, Inc.

Konica Minolto Opto, Inc.

Yasunari Fukuta

Keiji Matsusaka

Kazuki Matsui

Takashi Kawasaki

Soh Ohzawa

Masae Sato

Yusuke Hirao

Eigo Sano

Susumu Yamaguchi

Hiroshi Oshitani

An imaging lens system includes first and second lens groups each having a positive optical power (P, P) and a third lens group. During focusing, the second lens group moves. When the first lens group is divided into two groups across, as a boundary, the longest aerial distance (t) among the axial lens-to-lens distances located on the image side of the position of half the total length of the first lens group, the object-side group being a front group and the image-side group being a rear group, the most image-side surface in the front group and the most image-side surface in the rear group are lens surfaces concave to the image side. The conditional formulae 0.2&#x3c;P/P&#x3c;0.6, 0.3&#x3c;P/P&#x3c;0.9, 0.03&#x3c;t/t&#x3c;0.1, and 0.05&#x3c;t/t&#x3c;0.14 are fulfilled (P, the optical power of the entire system; t, the aerial distance between the first and second lens groups in the infinity-object-distance condition; t, the total length of the system.

Imaging lens system, imaging optical device, and digital appliance

An imaging optical system, an imaging device, and a digital apparatus of the invention are provided with an optical system constituted of five lens elements having positive, negative, positive, positive, and negative refractive powers, or positive, negative, negative, positive, and negative refractive powers; and satisfy the conditional expressions:1&#x3c;123/&#x3c;1.250.1&#x3c;6/&#x3c;0.150.30&#x3c;4/&#x3c;0.72where

Image optical system, imaging device, and digital apparatus

An image-capturing lens includes, in order from an object side: a meniscus-shaped first lens which has positive power near an optical axis; a second lens which has positive power near the optical axis and has negative power in the periphery of the second lens; and a meniscus-shaped third lens. The image-capturing lens satisfies the following conditional formulas: TL/f&#x3c;1.10, 2.00&#x3c;(r2+r1)/(r2&#x2212;r1)&#x3c;4.00, and 0.07&#x3c;D2/f&#x3c;0.19, where TL: the air-converted distance from the object-side surface of the first lens to the image-side surface thereof, f: the focal length of the entire system, r2: the radius of curvature of the first lens on the image side thereof, r1: the radius of curvature of the first lens on the object side thereof, D2: the distance between the first lens and the second lens.

Image-capturing lens

Disclosed is an imaging lens by which astigmatism and field curvature are satisfactorily corrected by arranging on a first surface a concave surface having an appropriate radius of curvature. Condition (1) defines the radius of curvature of the concave surface arranged on the object-side surface of a bonded compound lens. By fulfilling condition (1), a lens can be obtained in which astigmatism and field curvature are satisfactorily corrected. Condition (1): &#x2212;1.5&#x3c;rL11/f&#x3c;&#x2212;5.0, wherein rL11 is the local curvature radius of the object-side surface of the first lens calculated by the equation below; f is the focus distance of the entire system. rL11={(h1)2+(s1)2}/(2s1); h1 is 1/10 of the effective radius of the object-side surface of the first lens; and s1 is the displacement amount in a direction parallel to the optical axis from the surface apex point at a lens surface height h1.

Imaging lens and imaging device

A wafer lens () in which the warpage of a glass substrate included therein can be prevented, having a glass substrate (), a first resin part () composed of a curable resin, and a second resin part () composed of a curable resin. In each of the first resin part () and the second resin part (), two or more lens parts () are formed. A lens part of each of the first and second resin parts is located at the most objective side. A volume of the first resin of the first resin part () and a volume of the second resin of the second resin part () satisfies0.6&#x2266;&#x2266;2.1,where 'Vwa' and 'Vwb' are volumes of an object and image side resin, respectively.

Wafer lens and manufacturing method thereof

Disclosed is a wafer lens in which the warpage of a glass substrate included therein can be prevented. Specifically disclosed is a wafer lens comprising a glass substrate, a first resin part composed of a curable resin, and a second resin part composed of a curable resin. In each of the first resin part and the second resin part, two or more lens parts are formed. The volume of the resin of the first resin part after the cutting and the volume of the resin of the second resin part after the cutting satisfy the condition 0.6&#x2266;Vwa/Vwb&#x2266;2.1, wherein 'Vwa' indicates a volume of a resin on an object side and 'Vwb' indicates a volume of a resin on an image side.

Wafer lens and method for the production thereof

Provided is an image pickup lens composed of three lens elements and an image pickup apparatus using the same, where the image pickup lens has satisfactorily corrected aberrations despite being smaller in size than conventional image pickup lenses. As image pickup lens includes, in order from the object side, an aperture stop, a first lens, a second lens, and a third lens. The first lens is a positive lens and is a meniscus lens having a convex surface facing the object side and a concave surface facing the object side, and the third lens is a negative lens. The image pickup lens satisfies conditional expressions relating to an air gap between the second and third lenses, a focal length of the second lens, and a curvature radius of the object-side surface of the second lens.

Image pickup lens and image pickup apparatus

Provided is an imaging lens, in which a space holding portion is formed outside the effective aperture of one or both of junction type compound lenses facing each other in order to hold the space between the junction type compound lenses. A mating face formed on the space holding portion which is made of the same material as that of a lens portion is brought in direct contact with a mating face provided on the other among the junction type compound lenses facing each other at the position facing the mating face of the space holding portion, outside the effective aperture of the other junction type compound lens. Alternatively, mating faces which are formed on confronting surfaces of the space holding portions formed on the facing junction type compound lenses are brought in direct contact with each other.

Imaging lens, manufacturing method and imaging unit therefor

A variable power optical system () comprises a first lens group () having a negative optical power, a second lens group () having a positive optical power, and a third lens group (). The first to third lens groups are arranged in order from the object side to the image side. The first lens group () is composed of one negative lens () and is fixed in variable power. The third lens group () includes at least one aspherical surface. When the third lens group is divided into a front group and a rear group with the largest air space in the third group, the front group has a negative optical power, and the rear group has a positive optical power.

Variable power optical system, imaging device, and digital device

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

To provide an inexpensive image pickup lens ensuring mass productivity and preventing deterioration of images due to fluctuation of a paraxial image-point position caused by water absorption, image pickup device, digital apparatus, and a manufacturing method of the image pickup lens, the image pickup lens includes: at least one lens block including a lens substrate, and a lens portion or lens portions formed on at least one of an object-side surface or an image-side surface of the lens substrate. The lens portion is formed of an energy-curable resin material which is different from a material of the lens substrate. At least one lens portion has a dimension change rate caused by water absorption which is larger than a dimension change rate caused by water absorption of the lens substrate, and satisfies the predetermined expression about a change in refractive index the energy-curable resin material caused by water absorption.

Image pickup lens including at least one lens block wherein a lens portion or lens portions are formed on a lens substrate, image pickup device, digital apparatus and manufacturing method of image pickup lens

An image pickup lens, comprises sequentially from an object side: an aperture stop, a first lens being a positive meniscus lens which has a convex surface at the object side and a concave surface at an image side opposite to the object side, and a second lens having a concave surface at the object side and an image side surface whose radius of curvature on an paraxial region is infinite or a negative value, wherein the first lens is the second lens and the image side surface of the second lens includes an aspheric surface to make a positive power strong toward a lens peripheral region, and wherein the image pickup lens is made to satisfy the following conditional formulas.1.55&#x3c;n1&#x3c;1.80&#x2003;&#x2003;(1)0.4&#x3c;3/&#x3c;0.6&#x2003;&#x2003;(2)40.0&#x3c;&#x3bd;2&#x3c;90.0&#x2003;&#x2003;(3)

Image pickup lens, image pickup device, and mobile terminal device

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 (BK) arranged at a closest position to an object side has a positive powder, a second lens block (BK) arranged at an image side of the first lens block (BK) 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.

Image pickup lens, image pickup apparatus, mobile terminal, and method for manufacturing image pickup lens

A variable-power optical system includes, in order from an object side thereof: a first lens group with a negative optical power; a second lens group with a positive optical power; a third lens group with a negative optical power; and a fourth lens group with a positive optical power. An interval between the first lens group and the second lens group decreases when a power of the variable-power optical system varies from a wide-angle end to a telephoto end. The second lens group includes at least one aspheric surface. The variable-power optical system satisfies the predetermined conditional expressions.

Variable-power optical system, image pickup device, and digital apparatus

An image pickup lens LN includes four blocks of lens blocks Ci (i=to). Lens substrate Liis different in material from lens portions Liand Li. First lens block Chas positive power, second lens block Chas negative power, and fourth lens block Chas a concave shape facing an image side in a paraxial region. At least one of lens portions with a concave shape in the paraxial region satisfies the conditional expression &#x3bd;n&#x3c;40 (where &#x3bd;n is an Abbe number of a lens portion having a concave shape in the paraxial region), and first lens block Csatisfies the conditional expression 0.5&#x3c;f1/f&#x3c;1.5 (where f1 is a composite focal length of the first lens block and f is a composite focal length of the total system).

Growing community of inventors

Hachioji, Japan

Yasunari Fukuta