Milestone Co., Ltd.

Other

Satoshi Do

Satoshi Do and Milestone Co., Ltd.

Sirtec International (suzhou) Co. Ltd

Milestone Col., Ltd.

Yoshiyuki Hashimoto

C S Cheng

Isao Onuma

Chan-Shen Cheng

A wide-angle lens is disclosed. The wide-angle lens includes a first lens element L, a second lens element L, a third lens element L, an aperture diaphragm S, a fourth lens element Land a fifth lens element Larranged from an object plane to an image plane. The first element Lis a meniscus lens element having a negative focal power and protruding toward the object plane, the second element Lis a meniscus lens element having a negative focal power and protruding toward the object plane, the third element Lis a meniscus lens element having a positive focal power and protruding toward the image plane, the fourth element Lis a meniscus lens element having a negative focal power and protruding toward the object plane, and the fifth element Lis a lens element having a positive focal power.

Wide-angle lens

An imaging lens of which optical performance does not deteriorate even in a high temperature environment, various aberrations are well corrected, optical length is short, and back focus is sufficiently secured, comprising an aperture stop S and a junction type compound lenshaving a positive refractive power, wherein the aperture stop and the junction type compound lens are arranged in this sequence from an object side to an image side. The junction type compound lens comprises a first lens L, a second lens Land a third lens Larranged in this sequence from the object side to the image side. The first lens and the third lens are formed of a curable resin material, and the second lens is formed of an optical glass. The first lens and the second lens are directly bonded, and the second lens and the third lens are directly bonded. The object side face of the first lens and the image side face of the third lens are aspherical.

Imaging lens

The present invention is an imaging lens of which optical performance does not deteriorate even in a high temperature environment, various aberrations are well corrected, optical length is short, and back focus is sufficiently secured, the imaging lens comprising a first diaphragm S, a first junction type compound lens, a second diaphragm S, and a second junction type compound lens, characterized in that the first diaphragm, the first junction type compound lens, the second diaphragm and the second junction type compound lens are arranged in this sequence from an object side to an image side. The first junction type compound lens comprises a first lens L, a second lens Land a third lens L, arranged in the sequence from the object side to the image side, and the second junction type compound lens comprises a fourth lens L, a fifth lens Land a sixth lens L, arranged in this sequence from the object side to the image side. The first lens, the third lens, the fourth lens and the sixth lens are formed of a curable resin material. The second lens and the fifth lens are formed of a high softening temperature optical glass material.

The present invention is an imaging lens of which optical performance does not deteriorate even in a high temperature environment, various aberrations are well corrected, optical length is short, and back focus is sufficiently secured, the imaging lens comprising a first junction type compound lens, an aperture stop S, a second junction type compound lens, and a third junction type compound lens, which are arranged in this sequence from an object side to an image side. The first junction type compound lens comprises a first lens L, a second lens Land a third lens Larranged in this sequence from the object side to the image side, the second junction type compound lens comprises a fourth lens L, a fifth lens Land a sixth lens Larranged in this sequence from the object side to the image side, and the third junction type compound lens comprises a seventh lens L, an eighth lens Land a ninth lens Larranged in this sequence from the object side to the image side. The first lens, the third lens, the fourth lens, the sixth lens, the seventh lens and the ninth lens are formed of a curable resin material, and the second lens, the fifth lens and the eighth lens are formed of a high softening temperature optical glass material.

An imaging lens of which various aberrations are corrected well, optical length is short, and back focus is sufficiently secured, is provided. The imaging lens is formed of a first lens L, an aperture stop S, a second lens Land a third lens L, arranged in this sequence from the object side to the image side. The first lens Lis a meniscus lens having a positive refractive power, of which convex surface faces the object side, the second lens Lis a meniscus lens having a positive or negative refractive power, of which convex surface faces the image side, and the third lens Lis a meniscus lens having a negative refractive power, of which convex surface faces the object side. The Abbe number &#x3bd; of the second lens Lis a value in a 50.0 to 60.0 range.

The present invention is an imaging lens of which optical performance does not deteriorate even in a high temperature environment, various aberrations are well corrected, optical length is short, and back focus is sufficiently secured, the imaging lens comprising a first lens, an aperture stop S, a second lens, and a third lens, which are arranged in this sequence from an object side to an image side. For the first lens, a single lens is used. The second lens comprises a first sub-lens L, a second sub-lens Land a third sub-lens L, arranged in this sequence from the object side to the image side. The third lens comprises a fourth sub-lens L, a fifth sub-lens Land a sixth sub-lens L, arranged in this sequence from the object side to the image side. The first lens is formed of a transparent curable silicone resin, and the first, third, fourth and sixth sub-lenses are also formed of the transparent curable silicone resin. The second sub-lens and the fifth sub-lens are formed of a high softening temperature glass material.

An imaging lens of which optical performance does not deteriorate even in a high temperature environment, various aberrations are well corrected, optical length is short, and back focus is sufficiently secured; the imaging lens comprising: an aperture stop S; and a junction type compound lenshaving a positive refractive power, characterized in that the aperture stop and the compound lens are arranged in this sequence from an object side to an image side. The junction type compound lens comprises a first lens L, a second lens Land a third lens L, arranged in this sequence from the object side to the image side. The first lens and the third lens are formed of a curable resin material, and the second lens is formed of a high softening temperature optical glass material. The first lens and the second lens are bonded with adhesive, and the second lens and the third lens are bonded with adhesive. The object side face of the first lens and the image side face of the third lens are aspherical.

An imaging lens of which optical performance does not deteriorate even in a high temperature environment, various aberrations are well corrected, optical length is short, and back focus is sufficiently secured. This imaging lens comprises a first diaphragm S, a first junction type compound lens, a second diaphragm Sand a second junction type compound lens, wherein the first diaphragm, the first junction type compound lens, the second diaphragm, and the second junction type compound lens are arranged in this sequence from an object side to an image side. The first junction type compound lens comprises a first lens L, a second lens Land a third lens Larranged in this sequence from the object side to the image side, and the second junction type compound lens comprises a fourth lens L, a fifth lens Land a sixth lens Lin this sequence from the object side to the image side. The first lens, the third lens, the fourth lens and the sixth lens are formed of a curable resin material. The second lens and the fifth lens are formed of a glass material.

A pickup lens is provided with various aberrations corrected satisfactorily, with a short optical length, and with a sufficient back focus secured. The configuration comprises an aperture diaphragm S, first lens L, second lens L, and third lens L, and is configured by arranging, in order from the object side to the image side, the aperture diaphragm, first lens, second lens, and third lens. The first lens is a lens having positive refractive power, with convex surfaces on the object side and on the image side. The second lens is a lens having negative refractive power, in a meniscus shape with the convex surface on the image side. The third lens is a lens having negative refractive power, in a meniscus shape with the convex surface on the object side. Both of the surfaces of the first lens are aspherical, both of the surfaces of the second lens are aspherical, and both of the surfaces of the third lens are aspherical.

Pickup lens

A pickup lens is provided with various aberrations corrected satisfactorily, with a short optical length, and with a sufficient back focus secured. The configuration comprises an aperture diaphragm S, first lens L, second lens L, and third lens L, and is configured by arranging, in order from the object side to the image side, the aperture diaphragm, first lens, second lens, and third lens. The first lens is a lens having positive refractive power, in a meniscus shape with the convex surface on the object side. The second lens is a lens having negative refractive power, in a meniscus shape with the convex surface on the image side. The third lens is a lens having negative refractive power, in a meniscus shape with the convex surface on the object side. Both of the surfaces of the first lens are aspherical, both of the surfaces of the second lens are aspherical, and both of the surfaces of the third lens are aspherical.

An imaging lens of which optical performance does not deteriorate even in a high temperature environment, various aberrations are well corrected, optical length is short, and back focus is sufficiently secured. This imaging lens comprises a first junction type compound lens, an aperture diaphragm S, a second junction type compound lens, and a third junction type compound lens, wherein the first junction type compound lens, the aperture diaphragm, the second junction type compound lens, and the third junction type compound lens are arranged in this sequence from an object side to an image side. The first junction type compound lens comprises a first lens, a second lens and a third lens arranged in this sequence from the object side to the image side, the second junction type compound lens comprises a fourth lens, fifth lens and a sixth lens arranged in this sequence from the object side to the image side, and the third junction type compound lens comprises a seventh lens, an eighth lens and a ninth lens arranged in this sequence from the object side to the image side. The first lens, the third lens, the fourth lens, the sixth lens, the seventh lens and the ninth lens are formed of a curable resin material, and the second lens, the fifth lens and the eighth lens are formed of a high softening temperature glass material.

In an imaging lens of the present invention, various types of aberration are corrected favorably, the optical length is short, and a sufficient back focus is secured. The imaging lens comprises an aperture diaphragm S, a first lens L, a second lens L, and a third lens L, and is constituted such that the aperture diaphragm, first lens, second lens, and third lens are arranged in succession from the object side toward the image side. The first lens has a positive refractive power and convex surfaces facing the object side and the image side. The second lens has a negative refractive power, a meniscus shape, and a convex surface facing the image side. The third lens Lhas a positive refractive power and convex surfaces facing the object side and the image side. Both surfaces of the first lens, both surfaces of the second lens, and both surfaces of the third lens Lare aspherical.

The present invention relates to an imaging lens with an number in the rangeconfigured from two lenses, with a short lens optical length, and with sufficiently high image contrast so that sharp images are obtained. The imaging lens is configured by positioning, order from an object side to an image side, an aperture diaphragm, diaphragm, and a second lens, satisfying the following first lens, a second conditions. The first lens and second lens are both meniscus-shaped with convex surface facing the positive refractive power.

A pickup lens is provided in which various aberrations are satisfactorily corrected, which can be manufactured at low cost, and which has an optical length of 10 mm or less. This pickup lens is configured by arranging, in order from the object side, a first lens Lwith a meniscus shape with concave surface on the object side and having negative refractive power, an aperture diaphragm S, a second lens Lwith convex surfaces on both sides and having positive refractive power, a third lens Lwith concave surfaces on both sides and having negative refractive power, and a fourth lens Lwith convex surfaces on both sides and having positive refractive power; and with the following conditions satisfied.+5.0&#x3c;()/()&#x3c;+7.0&#x2003;&#x2003;(1)0.15f&#x3c;d&#x3c;0.3f&#x2003;&#x2003;(2) Here ris the radius of curvature of the object-side surface of the first lens in the vicinity of the optical axis (axial radius of curvature), ris the radius of curvature of the image-side surface of the first lens in the vicinity of the optical axis (axial radius of curvature), dis the thickness of the first lens, and f is the focal length of the entire system.

The present invention is an imaging lens in which various aberrations are satisfactorily corrected, the optical length is short, and a sufficient back focus is secured. The imaging lens is constituted by arranging a first lens L, an aperture diaphragm S, a second lens L, and a third lens Lin succession from the object side to the image side.

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Saitama, Japan

Satoshi Do