JP5630505B2 - Imaging lens - Google Patents
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Description
本発明は、ＣＣＤ型イメージセンサ若しくはＣＭＯＳ型イメージセンサ等の固体撮像素子を用いた撮像装置への適用に好適であり、小型で充分な性能を有する撮像レンズに関する。 The present invention relates to an imaging lens that is suitable for application to an imaging apparatus using a solid-state imaging device such as a CCD type image sensor or a CMOS type image sensor, and has a small size and sufficient performance.
ＣＣＤ型イメージセンサやＣＭＯＳ型イメージセンサ等の固体撮像素子を用いた小型の撮像装置が、携帯電話やＰＤＡ（Ｐｅｒｓｏｎａｌ Ｄｉｇｉｔａｌ Ａｓｓｉｓｔａｎｔ）等の携帯端末、更にはノートパソコン等にも搭載されるようになり、遠隔地へ音声情報だけでなく画像情報も相互に伝送することが可能になった。 Small-sized image pickup devices using solid-state image pickup devices such as CCD image sensors and CMOS image sensors will be mounted on mobile terminals such as mobile phones and PDAs (Personal Digital Assistants), and even notebook PCs. It is now possible to transmit not only audio information but also image information to remote locations.
このような撮像装置に用いられる固体撮像素子においては、近年、画素の小型化が進み、撮像素子の高画素化や小型化が図られている。有効画素数が２Ｍクラスのセンサとしては、１／５インチサイズ（画素ピッチ１．７５ｕｍ）の固体撮像素子が製品化されている。このような小型の撮像素子に使用される撮像レンズとして、３枚構成の撮像レンズが知られている（特許文献１〜６参照）。
In recent years, in the solid-state imaging device used in such an imaging apparatus, the size of pixels has been reduced, and the number of pixels and the size of the imaging device have been increased. A solid-state imaging device having a 1/5 inch size (pixel pitch of 1.75 μm) has been commercialized as a sensor having 2M effective pixels. A three-lens imaging lens is known as an imaging lens used for such a small imaging element (see
特許文献１〜３には、正の第１レンズ、開口絞り、正の第２レンズ及び負の第３レンズから構成される撮像レンズが記載されている。このタイプの撮像レンズは開口絞りを挟んで比較的対称な構成になるので、コマ収差や歪曲収差の補正に有利である。しかしながら、特許文献１及び特許文献３は、全てのレンズが同一材料で構成されているため色収差の補正が不充分である。特許文献２は、第１レンズがガラスで構成されているため、コスト高になってしまう。
特許文献４，５には、正の第１レンズ、開口絞り、負の第２レンズ及び負の第３レンズから構成される撮像レンズが記載されている。このタイプの撮像レンズは開口絞りを挟んで非対称な構成になるので、コマ収差や歪曲収差の補正に不利である。更に、レンズ全系における正の屈折力を１枚の正レンズで負担するため、第１レンズの誤差感度が高くなり、加工性が悪い。 Patent Documents 4 and 5 describe an imaging lens including a positive first lens, an aperture stop, a negative second lens, and a negative third lens. Since this type of imaging lens has an asymmetric configuration with an aperture stop in between, it is disadvantageous for correction of coma and distortion. Further, since the positive refractive power in the entire lens system is borne by one positive lens, the error sensitivity of the first lens is increased and the processability is poor.
特許文献６には、開口絞り、正の第１レンズ、正若しくは負の第２レンズ、及び負の第３レンズから構成される撮像レンズが記載されている。これは前置絞りの構成なので、固体撮像素子の撮像面に入射する光束の主光線入射角いわゆるテレセントリック性の補正が容易になるので、レンズの小型化に有利である。しかしながら、レンズ全系が非対称な構成であるため、コマ収差や歪曲収差や倍率色収差の補正に不利である。また、画素サイズの小さい固体撮像素子（たとえば１／５インチサイズ２Ｍ画素ピッチ１．７５ｕｍ）に使用される撮像レンズは、高細化された画素に対応するために高い解像力が要求される。レンズの解像力はＦ値により制限され、Ｆ値の小さい明るいレンズの方が高解像力を得られるため、特許文献６のようにＦ３．２程度のＦ値では充分な性能を得ることができない。 Patent Document 6 describes an imaging lens including an aperture stop, a positive first lens, a positive or negative second lens, and a negative third lens. Since this is a configuration of a front stop, it is easy to correct the chief ray incident angle, so-called telecentricity, of the light beam incident on the imaging surface of the solid-state imaging device, which is advantageous for downsizing of the lens. However, since the entire lens system has an asymmetric configuration, it is disadvantageous for correction of coma aberration, distortion aberration, and lateral chromatic aberration. In addition, an imaging lens used in a solid-state imaging device having a small pixel size (for example, 1/5 inch size 2M pixel pitch 1.75 μm) is required to have a high resolving power in order to cope with highly thinned pixels. Since the resolving power of the lens is limited by the F value, and a bright lens having a small F value can obtain a high resolving power, sufficient performance cannot be obtained with an F value of about F3.2 as in Patent Document 6.
本発明はこのような問題に鑑みてなされたものであり、その目的は、Ｆ値がＦ３．０よりも小さく、小型で、収差を良好に補正でき、シェーディングを抑制でき、更に生産性の良い撮像レンズを得ることにある。 The present invention has been made in view of such problems, and the object thereof is an F value smaller than F3.0, a small size, good correction of aberrations, suppression of shading, and high productivity. It is to obtain an imaging lens.
上記目的は下記に記載した発明により達成される。 The above object is achieved by the invention described below.
１．固体撮像素子の光電変換部に被写体像を結像させるための撮像レンズであって、
物体側から順に、
正の屈折力を有し物体側に凸面を向けたメニスカス形状の第１レンズと、
開口絞りと、
正の屈折力を有し像側に凸面を向けたメニスカス形状の第２レンズと、
負の屈折力を有し像側に凹面を向けた第３レンズとから構成され、
以下の条件式を満足することを特徴とする撮像レンズ。1. An imaging lens for forming a subject image on a photoelectric conversion unit of a solid-state imaging device,
From the object side,
A first meniscus lens having positive refractive power and having a convex surface facing the object side;
An aperture stop,
A second meniscus lens having positive refractive power and having a convex surface facing the image side;
A third lens having negative refractive power and having a concave surface facing the image side,
An imaging lens satisfying the following conditional expression:
−０．４５＜ｆ１２／ｆ３＜−０．２ （１）
０．４１＜ｆ１／ｆ２＜０．７３ （２）
−２．１５＜Ｐａｉｒ１２／Ｐ＜−１．４５ （３）
但し、
ｆ１２：前記第１レンズと前記第２レンズとの合成焦点距離
ｆ３：前記第３レンズの焦点距離
ｆ１：前記第１レンズの焦点距離
ｆ２：前記第２レンズの焦点距離
Ｐ：撮像レンズ全系の屈折力（焦点距離の逆数）
Ｐａｉｒ１２：前記第１レンズの像側面と前記第２レンズの物体側面とにより形成されるいわゆる空気レンズの屈折力であり、以下の条件式で求める。−0.45 <f12 / f3 <−0.2 (1)
0.41 <f1 / f2 <0.73 (2)
-2.15 <P air12 /P<-1.45 (3)
However,
f12: The combined focal length of the first lens and the second lens f3: The focal length of the third lens f1: The focal length of the first lens f2: The focal length of the second lens P: The entire imaging lens system Refractive power (reciprocal of focal length)
P air12 is a refractive power of a so-called air lens formed by the image side surface of the first lens and the object side surface of the second lens, and is determined by the following conditional expression.
Ｐａｉｒ１２＝（１−Ｎ１）／Ｒ２＋（Ｎ２−１）／Ｒ３−｛（（１−Ｎ１）・（Ｎ２−１））／（Ｒ２・Ｒ３）｝・Ｄ２
但し、
Ｎ１：前記第１レンズのｄ線に対する屈折率
Ｎ２：前記第２レンズのｄ線に対する屈折率
Ｒ２：前記第１レンズの像側面の曲率半径
Ｒ３：前記第２レンズの物体側面の曲率半径
Ｄ２：前記第１レンズと前記第２レンズの軸上の空気間隔P air12 = (1-N1) / R2 + (N2-1) / R3-{((1-N1) · (N2-1)) / (R2 · R3)} · D2
However,
N1: Refractive index with respect to d-line of the first lens N2: Refractive index with respect to d-line of the second lens R2: Radius of curvature of the image side surface of the first lens R3: Radius of curvature of the object side surface of the second lens D2: Air spacing on the axis of the first lens and the second lens
２．以下の条件式を満足することを特徴とする前記１に記載の撮像レンズ。
０．０６＜ｆ１／ｆ２３＜０．３ （４）
但し、
ｆ１：前記第１レンズの焦点距離
ｆ２３：前記第２レンズと前記第３レンズとの合成焦点距離2. 2. The imaging lens according to 1, wherein the following conditional expression is satisfied.
0.06 <f1 / f23 <0.3 (4)
However,
f1: Focal length of the first lens f23: Composite focal length of the second lens and the third lens
３．以下の条件式を満足することを特徴とする前記１（又は前記２）に記載の撮像レンズ。
２．１＜Ｐａｉｒ２３／Ｐ＜２．８ （５）
但し、
Ｐ：撮像レンズ全系の屈折力（焦点距離の逆数）
Ｐａｉｒ２３：前記第２レンズの像側面と前記第３レンズの物体側面とにより形成されるいわゆる空気レンズの屈折力であり、以下の条件式で求める。3. The imaging lens described in 1 (or 2) above, wherein the following conditional expression is satisfied.
2.1 < Pair23 / P <2.8 (5)
However,
P: Refractive power of the entire imaging lens system (reciprocal of focal length)
P air23 : is a refractive power of a so-called air lens formed by the image side surface of the second lens and the object side surface of the third lens, and is determined by the following conditional expression.
Ｐａｉｒ２３＝（１−Ｎ２）／Ｒ４＋（Ｎ３−１）／Ｒ５−｛（（１−Ｎ２）・（Ｎ３−１））／（Ｒ４・Ｒ５）｝・Ｄ４
但し、
Ｎ２：前記第２レンズのｄ線に対する屈折率
Ｎ３：前記第３レンズのｄ線に対する屈折率
Ｒ４：前記第２レンズの像側面の曲率半径
Ｒ５：前記第３レンズの物体側面の曲率半径
Ｄ４：前記第２レンズと前記第３レンズの軸上の空気間隔P air23 = (1-N2) / R4 + (N3-1) / R5-{((1-N2) · (N3-1)) / (R4 · R5)} · D4
However,
N2: Refractive index with respect to d line of the second lens N3: Refractive index with respect to d line of the third lens R4: Radius of curvature of the image side surface of the second lens R5: Radius of curvature of the object side surface of the third lens D4: Air spacing on the axis of the second lens and the third lens
４．以下の条件式を満足することを特徴とする前記１（〜前記３の何れか１項）に記載の撮像レンズ。
０．１８＜Ｄ１／ｆ＜０．３ （６）
０．１８＜Ｄ３／ｆ＜０．３ （７）
０．１２＜Ｄ５／ｆ＜０．２５ （８）
但し、
Ｄ１：前記第１レンズの軸上厚
Ｄ３：前記第２レンズの軸上厚
Ｄ５：前記第３レンズの軸上厚
ｆ：撮像レンズ全系の焦点距離4). The imaging lens according to 1 (to any one of 3), wherein the following conditional expression is satisfied.
0.18 <D1 / f <0.3 (6)
0.18 <D3 / f <0.3 (7)
0.12 <D5 / f <0.25 (8)
However,
D1: Axial thickness of the first lens D3: Axial thickness of the second lens D5: Axial thickness of the third lens f: Focal length of the entire imaging lens system
５．前記第３レンズは、物体側面と像側面とが非球面に形成され、光軸近傍では負の屈折力を有すると共に周辺部では正の屈折力を有し、以下の条件式を満足することを特徴とする前記１（〜前記４の何れか１項）に記載の撮像レンズ。
１５＜νｄ３＜３５ （９）
但し、
νｄ３：前記第３レンズのアッベ数5. The third lens has an object side surface and an image side surface formed as aspherical surfaces, has a negative refractive power in the vicinity of the optical axis and a positive refractive power in the peripheral portion, and satisfies the following conditional expression: 5. The imaging lens according to 1 (to any one of 4), which is characterized.
15 <νd3 <35 (9)
However,
νd3: Abbe number of the third lens
６．実質的に屈折力を持たないレンズを更に有することを特徴とする前記１〜５の何れか１項に記載の撮像レンズ。つまり、前記１〜５の構成に、実質的に屈折力を持たないダミーレンズを付与した場合でも本発明の適用範囲内である。
6). 6. The imaging lens according to any one of 1 to 5, further including a lens having substantially no refractive power. That is, even when a dummy lens having substantially no refractive power is added to the
請求項１の効果
本発明の撮像レンズは、物体側より順に、正の屈折力を有し物体側に凸面を向けた第１レンズと、開口絞りと、正の屈折力を有し像側に凸面を向けたメニスカス形状の第２レンズと、負の屈折力を有し像側に凹面を向けた第３レンズとから構成される。物体側より順に、第１レンズ及び第２レンズからなる正レンズ群と、像側に凹面を向けた負の第３レンズを配置する、このレンズ構成は、いわゆるテレフォトタイプであり、撮像レンズ全長の小型化に有利である。The imaging lens of the present invention includes, in order from the object side, a first lens having a positive refractive power and a convex surface facing the object side, an aperture stop, and a positive refractive power on the image side. A second meniscus lens having a convex surface and a third lens having a negative refractive power and a concave surface facing the image side. In order from the object side, a positive lens group including a first lens and a second lens and a negative third lens with a concave surface facing the image side are arranged. This lens configuration is a so-called telephoto type, and the entire length of the imaging lens. This is advantageous for downsizing.
収差補正に関しては、開口絞りが第１レンズと第２レンズの間に配置され、第１レンズが物体側に凸面を向けた形状であり、第２レンズが像側に凸面を向けたメニスカス形状であるから、対称的な構成となり、倍率色収差や歪曲収差を補正し易い構成である。また、正の屈折力を第１レンズと第２レンズで分担しているので、球面収差やコマ収差の発生を抑えることができる。更に、偏芯誤差の要因が少ないので、生産性の良いレンズを実現できる。 For aberration correction, the aperture stop is disposed between the first lens and the second lens, the first lens has a shape with a convex surface facing the object side, and the second lens has a meniscus shape with the convex surface facing the image side. Therefore, the configuration is symmetric, and it is easy to correct lateral chromatic aberration and distortion. In addition, since positive refractive power is shared by the first lens and the second lens, it is possible to suppress the occurrence of spherical aberration and coma. Furthermore, since there are few factors of eccentricity error, a lens with good productivity can be realized.
条件式（１）は、第１レンズ及び第２レンズによる正レンズ群の焦点距離と、第３レンズの負の焦点距離とを適切に設定することにより、小型化と収差補正をバランスよく行うための条件式である。ｆ１２／ｆ３が上限を下回ることで、レンズ全長の小型化を達成し、像面湾曲や歪曲収差等の軸外諸収差の補正を良好に行うことができる。一方、ｆ１２／ｆ３が下限を上回ることで、第３レンズの焦点距離が小さくなり過ぎず、固体撮像素子の撮像面の周辺部に結像する光束が過度に跳ね上げられることがなくなり、像側光束のテレセントリック性を容易に確保することができる。結果として、撮像面の周辺部において実質的な開口効率が減少する現象（シェーディング）を抑制することができる。 Conditional expression (1) is for reducing the size and correcting the aberration in a balanced manner by appropriately setting the focal length of the positive lens group of the first lens and the second lens and the negative focal length of the third lens. This is a conditional expression. By reducing f12 / f3 below the upper limit, it is possible to achieve a reduction in the overall length of the lens and to correct various off-axis aberrations such as field curvature and distortion. On the other hand, when f12 / f3 exceeds the lower limit, the focal length of the third lens does not become too small, and the light flux that forms an image on the periphery of the imaging surface of the solid-state imaging device is not excessively jumped up. The telecentricity of the luminous flux can be easily ensured. As a result, it is possible to suppress a phenomenon (shading) in which substantial aperture efficiency decreases in the peripheral portion of the imaging surface.
条件式（２）は、正レンズ群における第１レンズと第２レンズの焦点距離を適切に設定することにより、小型化と良好な収差補正を達成するための条件式である。ｆ１／ｆ２が上限を下回ることで、第２レンズの焦点距離に比べて第１レンズの焦点距離が大きくなり過ぎず、撮像レンズ全長の小型化を図ることができる。また、撮像レンズの射出瞳の位置を固体撮像素子から物体側へ遠ざけることができるので、撮像面に入射する光束の主光線入射角いわゆるテレセントリック性の補正が有利になる。一方、ｆ１／ｆ２が下限を上回ることで、第２レンズの焦点距離に比べて第１レンズの焦点距離が小さくなり過ぎず、第１レンズで発生する高次の球面収差やコマ収差を抑えることができる。更に、偏芯誤差感度を小さくすることができ、生産性の良いレンズが得られる。 Conditional expression (2) is a conditional expression for achieving miniaturization and good aberration correction by appropriately setting the focal lengths of the first lens and the second lens in the positive lens group. When f1 / f2 is less than the upper limit, the focal length of the first lens does not become too large compared to the focal length of the second lens, and the overall length of the imaging lens can be reduced. In addition, since the position of the exit pupil of the imaging lens can be moved away from the solid-state imaging device toward the object side, it is advantageous to correct the chief ray incident angle so-called telecentricity of the light beam incident on the imaging surface. On the other hand, when f1 / f2 exceeds the lower limit, the focal length of the first lens does not become too small compared to the focal length of the second lens, and higher-order spherical aberration and coma generated in the first lens are suppressed. Can do. Furthermore, the decentration error sensitivity can be reduced, and a lens with good productivity can be obtained.
条件式（３）は、第１レンズと第２レンズで形成される空気レンズの屈折力を適切にすることにより、像面補正及びレンズの加工性を良好にするための条件式である。Ｐａｉｒ１２／Ｐが上限を下回ることで、空気レンズによる負の屈折力を維持できるため、ペッツバール和が大きくなり過ぎず、像面を平坦にすることができる。一方、Ｐａｉｒ１２／Ｐが下限を上回ることで、空気レンズによる負の屈折力が強くなり過ぎないので、絞りを挟む第２面と第３面の曲率半径を大きくすることができ、レンズの加工性が良くなる。更に、軸外で第２面と第３面が離れるので、軸上での間隔を大きくしなくても絞りを挿入するための空気間隔を充分に確保でき、撮像レンズの小型化に有利になる。Conditional expression (3) is a conditional expression for improving the image plane correction and lens processability by making the refractive power of the air lens formed by the first lens and the second lens appropriate. When P air12 / P is less than the upper limit, the negative refractive power by the air lens can be maintained, so that the Petzval sum does not become too large and the image plane can be flattened. On the other hand, when P air12 / P exceeds the lower limit, the negative refractive power by the air lens does not become too strong, so that the radius of curvature of the second surface and the third surface sandwiching the stop can be increased, and the lens is processed. Sexuality is improved. Further, since the second surface and the third surface are separated from each other outside the shaft, a sufficient air space for inserting the diaphragm can be secured without increasing the space on the shaft, which is advantageous for downsizing of the imaging lens. .
請求項２の効果
条件式（４）は、開口絞りより物体側に配置される第１レンズの焦点距離と、開口絞りより像側に配置される第２レンズと第３レンズとの合成焦点距離をバランスよく設定するための条件式である。ｆ１／ｆ２３が上限を下回ることで、第２レンズと第３レンズとの合成焦点距離に比べて第１レンズの焦点距離が大きくなり過ぎず、撮像レンズ全系の主点位置が像側に寄り過ぎることを回避できる。したがって、撮像レンズ全系のレンズ全長を小さく抑えることができる。一方、ｆ１／ｆ２３が下限を上回ることで、第２レンズと第３レンズとの合成焦点距離に比べて、第１レンズの焦点距離が小さくなり過ぎず、射出瞳の位置を固体撮像素子から物体側へ遠ざけることができる。したがって、固体撮像素子の撮像面の周辺部に結像する光束の主光線入射角度を小さくすることが可能となる。The conditional expression (4) shows that the focal length of the first lens disposed on the object side from the aperture stop, and the combined focal length of the second lens and the third lens disposed on the image side from the aperture stop. Is a conditional expression for setting the balance in a balanced manner. When f1 / f23 is less than the upper limit, the focal length of the first lens does not become too large compared to the combined focal length of the second lens and the third lens, and the principal point position of the entire imaging lens system approaches the image side. You can avoid passing. Therefore, the overall lens length of the entire imaging lens system can be kept small. On the other hand, when f1 / f23 exceeds the lower limit, the focal length of the first lens is not too small compared to the combined focal length of the second lens and the third lens, and the position of the exit pupil is changed from the solid-state imaging device to the object. You can move away. Therefore, it is possible to reduce the chief ray incident angle of the light beam that forms an image on the periphery of the imaging surface of the solid-state imaging device.
請求項３の効果
条件式（５）は、第２レンズと第３レンズで形成される空気レンズの屈折力を適切にすることにより、軸外収差を良好に補正するための条件式である。Ｐａｉｒ２３／Ｐが上限を下回ることで、空気レンズによる正の屈折力を適度に確保できるため、負の第３レンズで発生する軸外諸収差をバランスよく補正することができる。一方、Ｐａｉｒ２３／Ｐが下限を上回ることで、空気レンズによる正の屈折力が強くなり過ぎず、軸外光束のコマフレアや歪曲収差の発生を抑制することができる。Effect of Claim 3 Conditional expression (5) is a conditional expression for satisfactorily correcting off-axis aberrations by making the refractive power of the air lens formed by the second lens and the third lens appropriate. Since P air23 / P is less than the upper limit, the positive refractive power by the air lens can be appropriately secured, so that off-axis aberrations generated by the negative third lens can be corrected in a balanced manner. On the other hand, when P air23 / P exceeds the lower limit, the positive refractive power by the air lens does not become too strong, and the occurrence of coma flare and distortion of off-axis light flux can be suppressed.
請求項４の効果
条件式（６），（７），（８）は、各レンズの厚みを適切に設定するための条件式である。各々の値が下限を上回ることで、各レンズが薄くなり過ぎて、加工性の難易度が上がることを抑えることができる。一方、各々の値が上限を下回ることで、各レンズが厚くなり過ぎず、レンズ全長の短縮が容易になり、撮像レンズの小型化が図れる。Effect of Claim 4 Conditional expressions (6), (7), and (8) are conditional expressions for appropriately setting the thickness of each lens. When each value exceeds the lower limit, each lens can be prevented from becoming too thin to increase the difficulty of workability. On the other hand, when each value is less than the upper limit, each lens does not become too thick, and the overall length of the lens can be easily shortened, and the imaging lens can be downsized.
請求項５の効果
第３レンズは、光軸近傍において負の屈折力を有しているので、テレフォトタイプの構成となる。よって、バックフォーカスを短くでき、全長の短縮に有利である。また、非球面形状によりレンズ周辺部に正の屈折力を持たせることで、第３レンズから射出する軸外光束は収斂作用となり、撮像面に入射する主光線の角度を小さくできる。Effect of Claim 5 Since the third lens has negative refractive power in the vicinity of the optical axis, it has a telephoto type configuration. Therefore, the back focus can be shortened, which is advantageous for shortening the overall length. Further, by providing the lens periphery with positive refractive power due to the aspherical shape, the off-axis light beam emitted from the third lens has a converging action, and the angle of the principal ray incident on the imaging surface can be reduced.
条件式（９）は、撮像レンズ全系の色収差を良好に補正するための条件式である。νｄ３が下限を上回ることで、負の屈折力を有する光軸近傍を通過する軸上光束の色収差を良好に補正することができる。また、νｄ３が上限を下回ることで、正の屈折力を有する周辺部を通過する軸外光束の倍率色収差を良好に補正することができる。 Conditional expression (9) is a conditional expression for satisfactorily correcting the chromatic aberration of the entire imaging lens system. When νd3 exceeds the lower limit, it is possible to satisfactorily correct the chromatic aberration of the axial light beam passing through the vicinity of the optical axis having negative refractive power. Further, when νd3 is lower than the upper limit, it is possible to satisfactorily correct lateral chromatic aberration of off-axis light beams that pass through a peripheral portion having positive refractive power.
以下に本発明の撮像レンズの実施例を示す。各実施例に使用する記号は下記の通りである。 Examples of the imaging lens of the present invention are shown below. Symbols used in each example are as follows.
ｆ：撮像レンズ全系の焦点距離
ｆＢ：バックフォーカス
Ｆ：Ｆナンバー
２Ｙ：固体撮像素子の撮像面対角線長
Ｒ：曲率半径
Ｄ：軸上面間隔
Ｎｄ：レンズ材料のｄ線に対する屈折率
νｄ：レンズ材料のアッベ数
ＥＮＴＰ：入射瞳位置（第１面から入射瞳位置までの距離）
ＥＸＴＰ：射出瞳位置（撮像面から射出瞳位置までの距離）
Ｈ１：前側主点位置（第１面から前側主点位置までの距離）
Ｈ２：後側主点位置（最終面から後側主点位置までの距離）
各実施例において、各面番号の後に（＊）が記載されている面は非球面形状を有する面である。非球面形状は、面の頂点を原点とし、光軸方向にＸ軸を取り、光軸と垂直方向の高さをｈとし、以下の数１で表す。f: Focal length of the entire imaging lens fB: Back focus F: F number 2Y: Diagonal length of the imaging surface of the solid-state imaging device R: Radius of curvature D: Spatial distance between axes Nd: Refractive index of lens material with respect to d-line νd: Lens material Abbe number of ENTP: entrance pupil position (distance from first surface to entrance pupil position)
EXTP: exit pupil position (distance from imaging surface to exit pupil position)
H1: Front principal point position (distance from the first surface to the front principal point position)
H2: Rear principal point position (distance from the final surface to the rear principal point position)
In each embodiment, the surface described with (*) after each surface number is a surface having an aspherical shape. The aspherical shape is expressed by the following
但し、
Ａｉ：ｉ次の非球面係数
Ｋ：円錐定数
また、非球面係数において、１０のべき乗数（例えば２．５×１０−０２）をＥ（例えば２．５Ｅ−０２）を用いて表している。However,
Ai: i-th order aspheric coefficient K: conic constant Further, in the aspheric coefficient, a power of 10 (for example, 2.5 × 10 −02 ) is expressed by using E (for example, 2.5E-02).
なお、請求の範囲及び実施例に記載の近軸曲率半径の意味合いについて、実際のレンズ測定の場面においては、レンズ中央近傍（具体的には、レンズ外径に対して１０％以内の中央領域）での形状測定値を最小自乗法でフィッティングした際の近似曲率半径を、近軸曲率半径とみなすことができる。 Regarding the meaning of the paraxial radius of curvature described in the claims and the examples, in the actual lens measurement scene, the vicinity of the center of the lens (specifically, the central region within 10% of the lens outer diameter) The approximate curvature radius when fitting the shape measurement value at with the least square method can be regarded as the paraxial curvature radius.
また、例えば２次の非球面係数を使用した場合には、非球面定義式の基準曲率半径に２次の非球面係数も勘案した曲率半径を近軸曲率半径とみなすことができる。（例えば参考文献として、松居吉哉著「レンズ設計法」（共立出版株式会社）のＰ４１〜４２を参照のこと） For example, when a secondary aspherical coefficient is used, a radius of curvature that takes into account the secondary aspherical coefficient in the reference curvature radius of the aspherical definition formula can be regarded as the paraxial curvature radius. (For example, refer to P41-42 of “Lens Design Method” written by Yoshiya Matsui (Kyoritsu Publishing Co., Ltd.) as a reference)
［実施例１］
撮像レンズの全体諸元を以下に示す。
ｆ＝２．２７ｍｍ
ｆＢ＝０．０５ｍｍ
Ｆ＝２．８
２Ｙ＝３．８ｍｍ
ＥＮＴＰ＝０．３８ｍｍ
ＥＸＴＰ＝−１．９３ｍｍ
Ｈ１＝０．０５ｍｍ
Ｈ２＝−２．２２ｍｍ[Example 1]
The overall specifications of the imaging lens are shown below.
f = 2.27mm
fB = 0.05mm
F = 2.8
2Y = 3.8mm
ENTP = 0.38mm
EXTP = -1.93mm
H1 = 0.05mm
H2 = −2.22mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 0.924 0.44 1.5447 56 0.56
２（＊） 2.288 0.03 0.34
３(絞り) ∞ 0.37 0.34
４（＊） -0.888 0.49 1.5447 56 0.47
５（＊） -0.756 0.35 0.70
６（＊） 1.497 0.33 1.6320 23 1.26
７（＊） 0.971 0.55 1.47
８ ∞ 0.40 1.5168 64.2 2.00
９ ∞ 2.00The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 0.924 0.44 1.5447 56 0.56
2 (*) 2.288 0.03 0.34
3 (Aperture) ∞ 0.37 0.34
4 (*) -0.888 0.49 1.5447 56 0.47
5 (*) -0.756 0.35 0.70
6 (*) 1.497 0.33 1.6320 23 1.26
7 (*) 0.971 0.55 1.47
8 ∞ 0.40 1.5168 64.2 2.00
9 ∞ 2.00
非球面係数を以下に示す。
第１面
K=0.14767E+00, A4=0.86591E-01, A6=-0.17312E+00, A8=0.12543E+01, A10=-0.55317E+00, A12=-0.46811E+01, A14=0.91282E+01
第２面
K=0.18030E+02, A4=0.19287E+00, A6=-0.59889E+01, A8=0.50638E+02, A10=-0.15146E+03, A12=-0.11847E+03
第４面
K=-0.37247E+01, A4=-0.11312E+01, A6=-0.39143E+01, A8=0.10608E+02, A10=-0.31944E+02, A12=0.35018E+02
第５面
K=-0.68435E+00, A4=-0.57714E+00, A6=0.11920E+01, A8=-0.33203E+01, A10=-0.96206E+00, A12=0.94673E+01
第６面
K=-0.24723E+02, A4=-0.38084E+00, A6=0.19016E+00, A8=0.30936E-01, A10=-0.17326E-01, A12=-0.16629E-01, A14=0.42559E-02
第７面
K=-0.84707E+01, A4=-0.25232E+00, A6=0.13290E+00, A8=-0.66150E-01, A10=0.19585E-01, A12=0.24825E-02, A14=-0.22619E-02The aspheric coefficient is shown below.
First side
K = 0.14767E + 00, A4 = 0.86591E-01, A6 = -0.17312E + 00, A8 = 0.12543E + 01, A10 = -0.55317E + 00, A12 = -0.46811E + 01, A14 = 0.91282E + 01
Second side
K = 0.18030E + 02, A4 = 0.19287E + 00, A6 = -0.59889E + 01, A8 = 0.50638E + 02, A10 = -0.15146E + 03, A12 = -0.11847E + 03
4th page
K = -0.37247E + 01, A4 = -0.11312E + 01, A6 = -0.39143E + 01, A8 = 0.10608E + 02, A10 = -0.31944E + 02, A12 = 0.35018E + 02
5th page
K = -0.68435E + 00, A4 = -0.57714E + 00, A6 = 0.11920E + 01, A8 = -0.33203E + 01, A10 = -0.96206E + 00, A12 = 0.94673E + 01
6th page
K = -0.24723E + 02, A4 = -0.38084E + 00, A6 = 0.19016E + 00, A8 = 0.30936E-01, A10 = -0.17326E-01, A12 = -0.16629E-01, A14 = 0.42559E -02
7th page
K = -0.84707E + 01, A4 = -0.25232E + 00, A6 = 0.13290E + 00, A8 = -0.66150E-01, A10 = 0.19585E-01, A12 = 0.24825E-02, A14 = -0.22619E -02
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 2.559
２ ４ 4.039
３ ６ -5.789Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 2.559
2 4 4.039
3 6 -5.789
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．３６８
（２）ｆ１／ｆ２＝０．６３４
（３）Ｐａｉｒ１２／Ｐ＝−２．０６２
（４）ｆ１／ｆ２３＝０．２２８
（５）Ｐａｉｒ２３／Ｐ＝２．３４６
（６）ｄ１／ｆ＝０．１９３
（７）ｄ３／ｆ＝０．２１６
（８）ｄ５／ｆ＝０．１４６
（９）ν３＝２３Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.368
(2) f1 / f2 = 0.634
(3) P air12 /P=−2.062
(4) f1 / f23 = 0.228
(5) P air23 /P=2.346
(6) d1 / f = 0.193
(7) d3 / f = 0.216
(8) d5 / f = 0.146
(9) ν3 = 23
図１は実施例１の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。
図２Ａ、Ｂ、Ｃは実施例１の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。1 is a cross-sectional view of the imaging lens of Example 1. FIG. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor.
2A, 2B, and 2C are aberration diagrams (spherical aberration, astigmatism, distortion) of the imaging lens of Example 1. FIG.
［実施例２］
撮像レンズの全体諸元を以下に示す。
ｆ＝２．２６ｍｍ
ｆＢ＝０．０５ｍｍ
Ｆ＝２．８
２Ｙ＝３．８ｍｍ
ＥＮＴＰ＝０．４２ｍｍ
ＥＸＴＰ＝−１．９２ｍｍ
Ｈ１＝０．０９ｍｍ
Ｈ２＝−２．２１ｍｍ[Example 2]
The overall specifications of the imaging lens are shown below.
f = 2.26mm
fB = 0.05mm
F = 2.8
2Y = 3.8mm
ENTP = 0.42mm
EXTP = -1.92mm
H1 = 0.09mm
H2 = −2.21mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 0.956 0.47 1.5447 56 0.59
２（＊） 2.504 0.04 0.35
３(絞り) ∞ 0.36 0.33
４（＊） -0.885 0.49 1.5447 56 0.47
５（＊） -0.733 0.33 0.70
６（＊） 1.455 0.30 1.6320 23 1.27
７（＊） 0.931 0.57 1.46
８ ∞ 0.40 1.5168 64.2 2.00
９ ∞ 2.00The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 0.956 0.47 1.5447 56 0.59
2 (*) 2.504 0.04 0.35
3 (Aperture) ∞ 0.36 0.33
4 (*) -0.885 0.49 1.5447 56 0.47
5 (*) -0.733 0.33 0.70
6 (*) 1.455 0.30 1.6320 23 1.27
7 (*) 0.931 0.57 1.46
8 ∞ 0.40 1.5168 64.2 2.00
9 ∞ 2.00
非球面係数を以下に示す。
第１面
K=0.98179E-01, A4=0.79491E-01, A6=-0.28870E+00, A8=0.16918E+01, A10=-0.14358E+01, A12=-0.70644E+01, A14=0.13909E+02
第２面
K=0.23134E+02, A4=0.10228E+00, A6=-0.45516E+01, A8=0.33536E+02, A10=-0.93568E+02, A12=-0.11847E+03
第４面
K=-0.35182E+01, A4=-0.11057E+01, A6=-0.37753E+01, A8=0.99112E+01, A10=-0.30478E+02, A12=0.35018E+02
第５面
K=-0.72278E+00, A4=-0.54089E+00, A6=0.11597E+01, A8=-0.34437E+01, A10=-0.34891E+00, A12=0.89693E+01
第６面
K=-0.25475E+02, A4=-0.38260E+00, A6=0.20088E+00, A8=0.27864E-01, A10=-0.21075E-01, A12=-0.16208E-01, A14=0.51512E-02
第７面
K=-0.84565E+01, A4=-0.26546E+00, A6=0.14823E+00, A8=-0.74425E-01, A10=0.20883E-01, A12=0.31141E-02, A14=-0.25540E-02The aspheric coefficient is shown below.
First side
K = 0.98179E-01, A4 = 0.79491E-01, A6 = -0.28870E + 00, A8 = 0.16918E + 01, A10 = -0.14358E + 01, A12 = -0.70644E + 01, A14 = 0.13909E + 02
Second side
K = 0.23134E + 02, A4 = 0.10228E + 00, A6 = -0.45516E + 01, A8 = 0.33536E + 02, A10 = -0.93568E + 02, A12 = -0.11847E + 03
4th page
K = -0.35182E + 01, A4 = -0.11057E + 01, A6 = -0.37753E + 01, A8 = 0.99112E + 01, A10 = -0.30478E + 02, A12 = 0.35018E + 02
5th page
K = -0.72278E + 00, A4 = -0.54089E + 00, A6 = 0.11597E + 01, A8 = -0.34437E + 01, A10 = -0.34891E + 00, A12 = 0.89693E + 01
6th page
K = -0.25475E + 02, A4 = -0.38260E + 00, A6 = 0.20088E + 00, A8 = 0.27864E-01, A10 = -0.21075E-01, A12 = -0.16208E-01, A14 = 0.51512E -02
7th page
K = -0.84565E + 01, A4 = -0.26546E + 00, A6 = 0.14823E + 00, A8 = -0.74425E-01, A10 = 0.20883E-01, A12 = 0.31141E-02, A14 = -0.25540E -02
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 2.563
２ ４ 3.666
３ ６ -5.245Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 2.563
2 4 3.666
3 6 -5.245
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．３９６
（２）ｆ１／ｆ２＝０．６９９
（３）Ｐａｉｒ１２／Ｐ＝−２．００４
（４）ｆ１／ｆ２３＝０．２４６
（５）Ｐａｉｒ２３／Ｐ＝２．４２０
（６）ｄ１／ｆ＝０．２０８
（７）ｄ３／ｆ＝０．２１７
（８）ｄ５／ｆ＝０．１３３
（９）ν３＝２３Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.396
(2) f1 / f2 = 0.699
(3) P air12 /P=−2.004
(4) f1 / f23 = 0.246
(5) P air23 /P=2.420
(6) d1 / f = 0.208
(7) d3 / f = 0.217
(8) d5 / f = 0.133
(9) ν3 = 23
図３は実施例２の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。
図４Ａ、Ｂ、Ｃは実施例２の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。FIG. 3 is a cross-sectional view of the imaging lens of the second embodiment. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor.
4A, 4B, and 4C are aberration diagrams (spherical aberration, astigmatism, distortion) of the imaging lens of Example 2. FIGS.
［実施例３］
撮像レンズの全体諸元を以下に示す。
ｆ＝２．２６ｍｍ
ｆＢ＝０．０５ｍｍ
Ｆ＝２．８
２Ｙ＝３．８ｍｍ
ＥＮＴＰ＝０．４９ｍｍ
ＥＸＴＰ＝−１．８４ｍｍ
Ｈ１＝０．０５ｍｍ
Ｈ２＝−２．２１ｍｍ[Example 3]
The overall specifications of the imaging lens are shown below.
f = 2.26mm
fB = 0.05mm
F = 2.8
2Y = 3.8mm
ENTP = 0.49mm
EXTP = -1.84mm
H1 = 0.05mm
H2 = −2.21mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 0.961 0.56 1.5447 56 0.62
２（＊） 2.819 0.02 0.33
３(絞り) ∞ 0.30 0.32
４（＊） -0.886 0.47 1.5447 56 0.43
５（＊） -0.787 0.36 0.67
６（＊） 1.768 0.33 1.6320 23 1.24
７（＊） 1.173 0.51 1.39
８ ∞ 0.40 1.5168 64.2 2.00
９ ∞ 2.00
非球面係数を以下に示す。
第１面
K=0.48844E-01, A4=0.71794E-01, A6=-0.30912E+00, A8=0.11515E+01, A10=-0.73800E+00, A12=-0.39416E+01, A14=0.38054E+01
第２面
K=0.14838E+02, A4=0.26471E+00, A6=-0.89175E+01, A8=0.73271E+02, A10=-0.22638E+03, A12=-0.11847E+03
第４面
K=-0.56234E+01, A4=-0.16233E+01, A6=-0.39806E+01, A8=0.10791E+02, A10=-0.50281E+02, A12=0.35018E+02
第５面
K=-0.52233E+00, A4=-0.74521E+00, A6=0.20798E+01, A8=-0.61805E+01, A10=0.66326E+00, A12=0.16169E+02
第６面
K=-0.50000E+02, A4=-0.51341E+00, A6=0.28563E+00, A8=0.31468E-01, A10=-0.33088E-01, A12=-0.21782E-01, A14=0.10685E-01
第７面
K=-0.13789E+02, A4=-0.31519E+00, A6=0.15666E+00, A8=-0.69376E-01, A10=0.15868E-01, A12=0.94274E-03, A14=-0.77165E-03The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 0.961 0.56 1.5447 56 0.62
2 (*) 2.819 0.02 0.33
3 (Aperture) ∞ 0.30 0.32
4 (*) -0.886 0.47 1.5447 56 0.43
5 (*) -0.787 0.36 0.67
6 (*) 1.768 0.33 1.6320 23 1.24
7 (*) 1.173 0.51 1.39
8 ∞ 0.40 1.5168 64.2 2.00
9 ∞ 2.00
The aspheric coefficient is shown below.
First side
K = 0.48844E-01, A4 = 0.71794E-01, A6 = -0.30912E + 00, A8 = 0.11515E + 01, A10 = -0.73800E + 00, A12 = -0.39416E + 01, A14 = 0.38054E + 01
Second side
K = 0.14838E + 02, A4 = 0.26471E + 00, A6 = -0.89175E + 01, A8 = 0.73271E + 02, A10 = -0.22638E + 03, A12 = -0.11847E + 03
4th page
K = -0.56234E + 01, A4 = -0.16233E + 01, A6 = -0.39806E + 01, A8 = 0.10791E + 02, A10 = -0.50281E + 02, A12 = 0.35018E + 02
5th page
K = -0.52233E + 00, A4 = -0.74521E + 00, A6 = 0.20798E + 01, A8 = -0.61805E + 01, A10 = 0.66326E + 00, A12 = 0.16169E + 02
6th page
K = -0.50000E + 02, A4 = -0.51341E + 00, A6 = 0.28563E + 00, A8 = 0.31468E-01, A10 = -0.33088E-01, A12 = -0.21782E-01, A14 = 0.10685E -01
7th page
K = -0.13789E + 02, A4 = -0.31519E + 00, A6 = 0.15666E + 00, A8 = -0.69376E-01, A10 = 0.15868E-01, A12 = 0.94274E-03, A14 = -0.77165E -03
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 2.420
２ ４ 4.850
３ ６ -6.985Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 2.420
2 4 4.850
3 6 -6.985
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．３０９
（２）ｆ１／ｆ２＝０．４９９
（３）Ｐａｉｒ１２／Ｐ＝−１．９１１
（４）ｆ１／ｆ２３＝０．１６８
（５）Ｐａｉｒ２３／Ｐ＝２．１６８
（６）ｄ１／ｆ＝０．２４７
（７）ｄ３／ｆ＝０．２０７
（８）ｄ５／ｆ＝０．１４４
（９）ν３＝２３Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.309
(2) f1 / f2 = 0.499
(3) P air12 /P=-1.911
(4) f1 / f23 = 0.168
(5) P air23 /P=2.168
(6) d1 / f = 0.247
(7) d3 / f = 0.207
(8) d5 / f = 0.144
(9) ν3 = 23
図５は実施例３の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。
図６Ａ、Ｂ、Ｃは実施例３の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。FIG. 5 is a cross-sectional view of the imaging lens of the third embodiment. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor.
6A, 6B, and 6C are aberration diagrams (spherical aberration, astigmatism, distortion aberration) of the imaging lens of Example 3. FIG.
［実施例４］
撮像レンズの全体諸元を以下に示す。
ｆ＝２．４２ｍｍ
ｆＢ＝０．０５ｍｍ
Ｆ＝２．８
２Ｙ＝３．８ｍｍ
ＥＮＴＰ＝０．５４ｍｍ
ＥＸＴＰ＝−１．９９ｍｍ
Ｈ１＝０．１０ｍｍ
Ｈ２＝−２．３７ｍｍ[Example 4]
The overall specifications of the imaging lens are shown below.
f = 2.42mm
fB = 0.05mm
F = 2.8
2Y = 3.8mm
ENTP = 0.54mm
EXTP = -1.99mm
H1 = 0.10mm
H2 = -2.37mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 1.037 0.57 1.5305 56 0.67
２（＊） 3.994 0.05 0.41
３(絞り) ∞ 0.43 0.35
４（＊） -0.958 0.61 1.5305 56 0.50
５（＊） -0.810 0.10 0.80
６（＊） 1.698 0.43 1.5830 30 1.29
７（＊） 0.972 0.58 1.48
８ ∞ 0.40 1.5168 64.2 2.00
９ ∞ 2.00The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 1.037 0.57 1.5305 56 0.67
2 (*) 3.994 0.05 0.41
3 (Aperture) ∞ 0.43 0.35
4 (*) -0.958 0.61 1.5305 56 0.50
5 (*) -0.810 0.10 0.80
6 (*) 1.698 0.43 1.5830 30 1.29
7 (*) 0.972 0.58 1.48
8 ∞ 0.40 1.5168 64.2 2.00
9 ∞ 2.00
非球面係数を以下に示す。
第１面
K=-0.14708E+00, A4=-0.17872E-01, A6=0.15523E+00, A8=-0.30828E+00, A10=-0.62282E+00, A12=0.21971E+01, A14=-0.23864E+01
第２面
K=0.26157E+02, A4=-0.14788E+00, A6=0.32494E+00, A8=-0.84093E+01, A10=0.42083E+02, A12=-0.71597E+02
第４面
K=-0.47839E+00, A4=-0.29799E+00, A6=-0.44025E+01, A8=0.14540E+02, A10=-0.54005E+02, A12=0.21665E+02
第５面
K=-0.71960E+00, A4=-0.58707E+00, A6=0.13875E+01, A8=-0.17423E+01, A10=-0.27244E+01, A12=0.51656E+01
第６面
K=-0.43666E+02, A4=-0.35117E+00, A6=0.14541E+00, A8=0.36511E-01, A10=-0.47584E-02, A12=-0.20306E-01, A14=0.63588E-02
第７面
K=-0.58221E+01, A4=-0.28540E+00, A6=0.14332E+00, A8=-0.63012E-01, A10=0.96838E-02, A12=0.21333E-02, A14=-0.43770E-03The aspheric coefficient is shown below.
First side
K = -0.14708E + 00, A4 = -0.17872E-01, A6 = 0.15523E + 00, A8 = -0.30828E + 00, A10 = -0.62282E + 00, A12 = 0.21971E + 01, A14 = -0.23864 E + 01
Second side
K = 0.26157E + 02, A4 = -0.14788E + 00, A6 = 0.32494E + 00, A8 = -0.84093E + 01, A10 = 0.42083E + 02, A12 = -0.71597E + 02
4th page
K = -0.47839E + 00, A4 = -0.29799E + 00, A6 = -0.44025E + 01, A8 = 0.14540E + 02, A10 = -0.54005E + 02, A12 = 0.21665E + 02
5th page
K = -0.71960E + 00, A4 = -0.58707E + 00, A6 = 0.13875E + 01, A8 = -0.17423E + 01, A10 = -0.27244E + 01, A12 = 0.51656E + 01
6th page
K = -0.43666E + 02, A4 = -0.35117E + 00, A6 = 0.14541E + 00, A8 = 0.36511E-01, A10 = -0.47584E-02, A12 = -0.20306E-01, A14 = 0.63588E -02
7th page
K = -0.58221E + 01, A4 = -0.28540E + 00, A6 = 0.14332E + 00, A8 = -0.63012E-01, A10 = 0.96838E-02, A12 = 0.21333E-02, A14 = -0.43770E -03
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 2.475
２ ４ 4.062
３ ６ -4.994Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 2.475
2 4 4.062
3 6 -4.994
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．４４６
（２）ｆ１／ｆ２＝０．６０９
（３）Ｐａｉｒ１２／Ｐ＝−１．７４５
（４）ｆ１／ｆ２３＝０．１１６
（５）Ｐａｉｒ２３／Ｐ＝２．３５７
（６）ｄ１／ｆ＝０．２３７
（７）ｄ３／ｆ＝０．２５４
（８）ｄ５／ｆ＝０．１７９
（９）ν３＝３０Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.446
(2) f1 / f2 = 0.609
(3) Pair12 / P = -1.745
(4) f1 / f23 = 0.116
(5) P air23 /P=2.357
(6) d1 / f = 0.237
(7) d3 / f = 0.254
(8) d5 / f = 0.179
(9) ν3 = 30
図７は実施例４の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。
図８Ａ、Ｂ、Ｃは実施例４の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。FIG. 7 is a sectional view of the imaging lens of Example 4. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor.
8A, 8B, and 8C are aberration diagrams (spherical aberration, astigmatism, distortion) of the imaging lens of Example 4. FIGS.
［実施例５］
撮像レンズの全体諸元を以下に示す。
ｆ＝２．４０ｍｍ
ｆＢ＝０．０６ｍｍ
Ｆ＝２．８
２Ｙ＝３．８ｍｍ
ＥＮＴＰ＝０．５３ｍｍ
ＥＸＴＰ＝−２．００ｍｍ
Ｈ１＝０．１３ｍｍ
Ｈ２＝−２．３４ｍｍ[Example 5]
The overall specifications of the imaging lens are shown below.
f = 2.40mm
fB = 0.06mm
F = 2.8
2Y = 3.8mm
ENTP = 0.53mm
EXTP = -2.00mm
H1 = 0.13mm
H2 = -2.34mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 1.085 0.57 1.5305 56 0.68
２（＊） 5.472 0.05 0.42
３(絞り) ∞ 0.45 0.35
４（＊） -0.935 0.61 1.5305 56 0.50
５（＊） -0.810 0.10 0.80
６（＊） 1.579 0.42 1.5830 30 1.30
７（＊） 0.934 0.57 1.48
８ ∞ 0.40 1.5168 64.2 2.00
９ ∞ 2.00The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 1.085 0.57 1.5305 56 0.68
2 (*) 5.472 0.05 0.42
3 (Aperture) ∞ 0.45 0.35
4 (*) -0.935 0.61 1.5305 56 0.50
5 (*) -0.810 0.10 0.80
6 (*) 1.579 0.42 1.5830 30 1.30
7 (*) 0.934 0.57 1.48
8 ∞ 0.40 1.5168 64.2 2.00
9 ∞ 2.00
非球面係数を以下に示す。
第１面
K=-0.23246E+00, A4=-0.22597E-01, A6=0.53905E-01, A8=-0.16875E+00, A10=-0.73377E+00, A12=0.15826E+01, A14=-0.17406E+01
第２面
K=0.74193E+01, A4=-0.15873E+00, A6=-0.87711E-01, A8=-0.53384E+01, A10=0.35129E+02, A12=-0.71597E+02
第４面
K=-0.64498E+00, A4=-0.26143E+00, A6=-0.46019E+01, A8=0.12862E+02, A10=-0.54393E+02, A12=0.21666E+02
第５面
K=-0.70259E+00, A4=-0.60312E+00, A6=0.15623E+01, A8=-0.21131E+01, A10=-0.29097E+01, A12=0.56566E+01
第６面
K=-0.50000E+02, A4=-0.36528E+00, A6=0.16551E+00, A8=0.36020E-01, A10=-0.74333E-02, A12=-0.21055E-01, A14=0.67896E-02
第７面
K=-0.73663E+01, A4=-0.27737E+00, A6=0.14561E+00, A8=-0.61581E-01, A10=0.94469E-02, A12=0.18967E-02, A14=-0.39631E-03The aspheric coefficient is shown below.
First side
K = -0.23246E + 00, A4 = -0.22597E-01, A6 = 0.53905E-01, A8 = -0.16875E + 00, A10 = -0.73377E + 00, A12 = 0.15826E + 01, A14 = -0.17406 E + 01
Second side
K = 0.74193E + 01, A4 = -0.15873E + 00, A6 = -0.87711E-01, A8 = -0.53384E + 01, A10 = 0.35129E + 02, A12 = -0.71597E + 02
4th page
K = -0.64498E + 00, A4 = -0.26143E + 00, A6 = -0.46019E + 01, A8 = 0.12862E + 02, A10 = -0.54393E + 02, A12 = 0.21666E + 02
5th page
K = -0.70259E + 00, A4 = -0.60312E + 00, A6 = 0.15623E + 01, A8 = -0.21131E + 01, A10 = -0.29097E + 01, A12 = 0.56566E + 01
6th page
K = -0.50000E + 02, A4 = -0.36528E + 00, A6 = 0.16551E + 00, A8 = 0.36020E-01, A10 = -0.74333E-02, A12 = -0.21055E-01, A14 = 0.67896E -02
7th page
K = -0.73663E + 01, A4 = -0.27737E + 00, A6 = 0.14561E + 00, A8 = -0.61581E-01, A10 = 0.94469E-02, A12 = 0.18967E-02, A14 = -0.39631E -03
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 2.442
２ ４ 4.220
３ ６ -5.171Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 2.442
2 4 4.220
3 6 -5.171
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．４３２
（２）ｆ１／ｆ２＝０．５７９
（３）Ｐａｉｒ１２／Ｐ＝−１．６５８
（４）ｆ１／ｆ２３＝０．１０７
（５）Ｐａｉｒ２３／Ｐ＝２．３９９
（６）ｄ１／ｆ＝０．２３７
（７）ｄ３／ｆ＝０．２５６
（８）ｄ５／ｆ＝０．１７７
（９）ν３＝３０Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.432
(2) f1 / f2 = 0.579
(3) P air12 /P=−1.658
(4) f1 / f23 = 0.107
(5) P air23 /P=2.399
(6) d1 / f = 0.237
(7) d3 / f = 0.256
(8) d5 / f = 0.177
(9) ν3 = 30
図９は実施例５の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。
図１０Ａ、Ｂ、Ｃは実施例５の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。FIG. 9 is a sectional view of the imaging lens of Example 5. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor.
10A, 10B, and 10C are aberration diagrams (spherical aberration, astigmatism, distortion aberration) of the imaging lens of Example 5. FIGS.
［実施例６］
撮像レンズの全体諸元を以下に示す。
ｆ＝２．４６ｍｍ
ｆＢ＝０．１０ｍｍ
Ｆ＝２．８
２Ｙ＝３．８ｍｍ
ＥＮＴＰ＝０．４１ｍｍ
ＥＸＴＰ＝−２．２０ｍｍ
Ｈ１＝０．２５ｍｍ
Ｈ２＝−２．３５ｍｍ[Example 6]
The overall specifications of the imaging lens are shown below.
f = 2.46mm
fB = 0.10mm
F = 2.8
2Y = 3.8mm
ENTP = 0.41mm
EXTP = -2.20mm
H1 = 0.25mm
H2 = -2.35mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 1.289 0.46 1.5305 56 0.65
２（＊） 12.880 0.05 0.46
３(絞り) ∞ 0.53 0.38
４（＊） -0.810 0.50 1.5305 56 0.55
５（＊） -0.721 0.12 0.77
６（＊） 1.341 0.38 1.5830 30 1.22
７（＊） 0.860 0.74 1.40
８ ∞ 0.40 1.5168 64.2 2.00
９ ∞ 2.00The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 1.289 0.46 1.5305 56 0.65
2 (*) 12.880 0.05 0.46
3 (Aperture) ∞ 0.53 0.38
4 (*) -0.810 0.50 1.5305 56 0.55
5 (*) -0.721 0.12 0.77
6 (*) 1.341 0.38 1.5830 30 1.22
7 (*) 0.860 0.74 1.40
8 ∞ 0.40 1.5168 64.2 2.00
9 ∞ 2.00
非球面係数を以下に示す。
第１面
K=-0.62565E+00, A4=0.22974E-01, A6=-0.34077E+00, A8=0.83717E+00, A10=-0.28413E+01, A12=0.43129E+01, A14=-0.30317E+01
第２面
K=-0.13165E+02, A4=-0.29878E+00, A6=0.21144E+01, A8=-0.17960E+02, A10=0.61411E+02, A12=-0.71618E+02
第４面
K=-0.80670E+00, A4=-0.11672E+00, A6=-0.45307E+01, A8=0.11553E+02, A10=-0.14660E+02, A12=0.22583E+02
第５面
K=-0.80487E+00, A4=-0.60087E+00, A6=0.18035E+01, A8=-0.32933E+01, A10=-0.28596E+01, A12=0.11679E+02, A14=0.74684E+01, A16=-0.17438E+02
第６面
K=-0.24601E+02, A4=-0.37201E+00, A6=0.24905E+00, A8=-0.22023E-01, A10=-0.28699E-01, A12=-0.87129E-02, A14=0.15837E-01, A16=-0.39142E-02
第７面
K=-0.70116E+01, A4=-0.27489E+00, A6=0.15741E+00, A8=-0.77602E-01, A10=0.18750E-01, A12=0.29566E-02, A14=-0.36631E-02, A16=0.83444E-03The aspheric coefficient is shown below.
First side
K = -0.62565E + 00, A4 = 0.22974E-01, A6 = -0.34077E + 00, A8 = 0.83717E + 00, A10 = -0.28413E + 01, A12 = 0.43129E + 01, A14 = -0.30317E +01
Second side
K = -0.13165E + 02, A4 = -0.29878E + 00, A6 = 0.21144E + 01, A8 = -0.17960E + 02, A10 = 0.61411E + 02, A12 = -0.71618E + 02
4th page
K = -0.80670E + 00, A4 = -0.11672E + 00, A6 = -0.45307E + 01, A8 = 0.11553E + 02, A10 = -0.14660E + 02, A12 = 0.22583E + 02
5th page
K = -0.80487E + 00, A4 = -0.60087E + 00, A6 = 0.18035E + 01, A8 = -0.32933E + 01, A10 = -0.28596E + 01, A12 = 0.11679E + 02, A14 = 0.74684E +01, A16 = -0.17438E + 02
6th page
K = -0.24601E + 02, A4 = -0.37201E + 00, A6 = 0.24905E + 00, A8 = -0.22023E-01, A10 = -0.28699E-01, A12 = -0.87129E-02, A14 = 0.15837 E-01, A16 = -0.39142E-02
7th page
K = -0.70116E + 01, A4 = -0.27489E + 00, A6 = 0.15741E + 00, A8 = -0.77602E-01, A10 = 0.18750E-01, A12 = 0.29566E-02, A14 = -0.36631E -02, A16 = 0.83444E-03
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 2.663
２ ４ 4.169
３ ６ -5.823Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 2.663
2 4 4.169
3 6 -5.823
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．３８９
（２）ｆ１／ｆ２＝０．６３９
（３）Ｐａｉｒ１２／Ｐ＝−１．７４８
（４）ｆ１／ｆ２３＝０．２００
（５）Ｐａｉｒ２３／Ｐ＝２．７８２
（６）ｄ１／ｆ＝０．１８９
（７）ｄ３／ｆ＝０．２０６
（８）ｄ５／ｆ＝０．１５６
（９）ν３＝３０Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.389
(2) f1 / f2 = 0.039
(3) Pair12 / P = -1.748
(4) f1 / f23 = 0.200
(5) P air23 /P=2.882
(6) d1 / f = 0.189
(7) d3 / f = 0.206
(8) d5 / f = 0.156
(9) ν3 = 30
図１１は実施例６の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。図１２Ａ、Ｂ、Ｃは実施例６の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。 FIG. 11 is a sectional view of the imaging lens of Example 6. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor. 12A, 12B, and 12C are aberration diagrams (spherical aberration, astigmatism, distortion) of the imaging lens of Example 6. FIGS.
［実施例７］
撮像レンズの全体諸元を以下に示す。
ｆ＝２．４５ｍｍ
ｆＢ＝０．０５ｍｍ
Ｆ＝２．８
２Ｙ＝３．８ｍｍ
ＥＮＴＰ＝０．４１ｍｍ
ＥＸＴＰ＝−２．２６ｍｍ
Ｈ１＝０．２７ｍｍ
Ｈ２＝−２．４０ｍｍ[Example 7]
The overall specifications of the imaging lens are shown below.
f = 2.45mm
fB = 0.05mm
F = 2.8
2Y = 3.8mm
ENTP = 0.41mm
EXTP = -2.26mm
H1 = 0.27mm
H2 = -2.40mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 1.206 0.46 1.5305 56 0.64
２（＊） 7.331 0.05 0.45
３(絞り) ∞ 0.51 0.38
４（＊） -0.848 0.53 1.5305 56 0.54
５（＊） -0.751 0.10 0.78
６（＊） 1.417 0.40 1.5830 30 1.23
７（＊） 0.915 0.79 1.41
８ ∞ 0.40 1.5168 64.2 2.00
９ ∞ 2.00The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 1.206 0.46 1.5305 56 0.64
2 (*) 7.331 0.05 0.45
3 (Aperture) ∞ 0.51 0.38
4 (*) -0.848 0.53 1.5305 56 0.54
5 (*) -0.751 0.10 0.78
6 (*) 1.417 0.40 1.5830 30 1.23
7 (*) 0.915 0.79 1.41
8 ∞ 0.40 1.5168 64.2 2.00
9 ∞ 2.00
非球面係数を以下に示す。
第１面
K=-0.54416E+00, A4=0.23223E-01, A6=-0.97263E-01, A8=-0.21172E+00, A10=-0.74881E+00, A12=0.38846E+01, A14=-0.53008E+01
第２面
K=0.50000E+02, A4=-0.29447E+00, A6=0.23446E+01, A8=-0.20568E+02, A10=0.69326E+02, A12=-0.71618E+02
第４面
K=-0.90856E+00, A4=-0.98201E-01, A6=-0.50314E+01, A8=0.14896E+02, A10=-0.25111E+02, A12=0.22583E+02
第５面
K=-0.71914E+00, A4=-0.54546E+00, A6=0.16300E+01, A8=-0.27881E+01, A10=-0.25985E+01, A12=0.94326E+01, A14=0.57157E+01, A16=-0.12881E+02
第６面
K=-0.25542E+02, A4=-0.34856E+00, A6=0.20849E+00, A8=-0.31470E-02, A10=-0.19103E-01, A12=-0.12750E-01, A14=0.11847E-01, A16=-0.23443E-02
第７面
K=-0.68891E+01, A4=-0.26555E+00, A6=0.14481E+00, A8=-0.67610E-01, A10=0.14547E-01, A12=0.24790E-02, A14=-0.21818E-02, A16=0.41862E-03The aspheric coefficient is shown below.
First side
K = -0.54416E + 00, A4 = 0.23223E-01, A6 = -0.97263E-01, A8 = -0.21172E + 00, A10 = -0.74881E + 00, A12 = 0.38846E + 01, A14 = -0.53008 E + 01
Second side
K = 0.50000E + 02, A4 = -0.29447E + 00, A6 = 0.23446E + 01, A8 = -0.20568E + 02, A10 = 0.69326E + 02, A12 = -0.71618E + 02
4th page
K = -0.90856E + 00, A4 = -0.98201E-01, A6 = -0.50314E + 01, A8 = 0.14896E + 02, A10 = -0.25111E + 02, A12 = 0.22583E + 02
5th page
K = -0.71914E + 00, A4 = -0.54546E + 00, A6 = 0.16300E + 01, A8 = -0.27881E + 01, A10 = -0.25985E + 01, A12 = 0.94326E + 01, A14 = 0.57157E +01, A16 = -0.12881E + 02
6th page
K = -0.25542E + 02, A4 = -0.34856E + 00, A6 = 0.20849E + 00, A8 = -0.31470E-02, A10 = -0.19103E-01, A12 = -0.12750E-01, A14 = 0.11847 E-01, A16 = -0.23443E-02
7th page
K = -0.68891E + 01, A4 = -0.26555E + 00, A6 = 0.14481E + 00, A8 = -0.67610E-01, A10 = 0.14547E-01, A12 = 0.24790E-02, A14 = -0.21818E -02, A16 = 0.41862E-03
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 2.652
２ ４ 4.252
３ ６ -6.265Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 2.652
2 4 4.252
3 6 -6.265
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．３６４
（２）ｆ１／ｆ２＝０．６２４
（３）Ｐａｉｒ１２／Ｐ＝−１．７６９
（４）ｆ１／ｆ２３＝０．２１８
（５）Ｐａｉｒ２３／Ｐ＝２．６６１
（６）ｄ１／ｆ＝０．１８７
（７）ｄ３／ｆ＝０．２１９
（８）ｄ５／ｆ＝０．１６２
（９）ν３＝３０Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.364
(2) f1 / f2 = 0.624
(3) P air12 /P=−1.769
(4) f1 / f23 = 0.218
(5) P air23 /P=2.661
(6) d1 / f = 0.187
(7) d3 / f = 0.219
(8) d5 / f = 0.162
(9) ν3 = 30
図１３は実施例７の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。図１４Ａ、Ｂ、Ｃは実施例７の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。 FIG. 13 is a cross-sectional view of the imaging lens of the seventh embodiment. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor. 14A, 14B, and 14C are aberration diagrams (spherical aberration, astigmatism, distortion) of the imaging lens of Example 7. FIGS.
［実施例８］
撮像レンズの全体諸元を以下に示す。
ｆ＝２．４１ｍｍ
ｆＢ＝０．０５ｍｍ
Ｆ＝２．８
２Ｙ＝３．８ｍｍ
ＥＮＴＰ＝０．５０ｍｍ
ＥＸＴＰ＝−２．０６ｍｍ
Ｈ１＝０．１５ｍｍ
Ｈ２＝−２．３６ｍｍ[Example 8]
The overall specifications of the imaging lens are shown below.
f = 2.41mm
fB = 0.05mm
F = 2.8
2Y = 3.8mm
ENTP = 0.50mm
EXTP = −2.06mm
H1 = 0.15mm
H2 = -2.36mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 1.099 0.54 1.5305 56 0.67
２（＊） 7.147 0.05 0.44
３(絞り) ∞ 0.43 0.36
４（＊） -0.836 0.60 1.5305 56 0.49
５（＊） -0.812 0.10 0.78
６（＊） 1.492 0.45 1.5830 30 1.26
７（＊） 0.962 0.63 1.46
８ ∞ 0.40 1.5168 64.2 2.00
９ ∞ 2.00The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 1.099 0.54 1.5305 56 0.67
2 (*) 7.147 0.05 0.44
3 (aperture) ∞ 0.43 0.36
4 (*) -0.836 0.60 1.5305 56 0.49
5 (*) -0.812 0.10 0.78
6 (*) 1.492 0.45 1.5830 30 1.26
7 (*) 0.962 0.63 1.46
8 ∞ 0.40 1.5168 64.2 2.00
9 ∞ 2.00
非球面係数を以下に示す。
第１面
K=-0.24089E+00, A4=-0.42000E-02, A6=-0.87218E-01, A8=-0.19324E+00, A10=-0.69700E+00, A12=0.12226E+01, A14=-0.14562E+01
第２面
K=-0.49485E+02, A4=-0.24765E+00, A6=0.36275E+00, A8=-0.90643E+01, A10=0.45270E+02, A12=-0.71597E+02
第４面
K=-0.10664E+01, A4=-0.62667E-01, A6=-0.76689E+01, A8=0.24185E+02, A10=-0.85204E+02, A12=0.21729E+02
第５面
K=-0.73708E+00, A4=-0.58196E+00, A6=0.14245E+01, A8=-0.22796E+01, A10=-0.25846E+01, A12=0.60833E+01
第６面
K=-0.50000E+02, A4=-0.37197E+00, A6=0.17796E+00, A8=0.30840E-01, A10=-0.83528E-02, A12=-0.20689E-01, A14=0.68780E-02
第７面
K=-0.97558E+01, A4=-0.26339E+00, A6=0.14211E+00, A8=-0.60401E-01, A10=0.88379E-02, A12=0.21280E-02, A14=-0.49782E-03The aspheric coefficient is shown below.
First side
K = -0.24089E + 00, A4 = -0.42000E-02, A6 = -0.87218E-01, A8 = -0.19324E + 00, A10 = -0.69700E + 00, A12 = 0.12226E + 01, A14 =- 0.14562E + 01
Second side
K = -0.49485E + 02, A4 = -0.24765E + 00, A6 = 0.36275E + 00, A8 = -0.90643E + 01, A10 = 0.45270E + 02, A12 = -0.71597E + 02
4th page
K = -0.10664E + 01, A4 = -0.62667E-01, A6 = -0.76689E + 01, A8 = 0.24185E + 02, A10 = -0.85204E + 02, A12 = 0.21729E + 02
5th page
K = -0.73708E + 00, A4 = -0.58196E + 00, A6 = 0.14245E + 01, A8 = -0.22796E + 01, A10 = -0.25846E + 01, A12 = 0.60833E + 01
6th page
K = -0.50000E + 02, A4 = -0.37197E + 00, A6 = 0.17796E + 00, A8 = 0.30840E-01, A10 = -0.83528E-02, A12 = -0.20689E-01, A14 = 0.68780E -02
7th page
K = -0.97558E + 01, A4 = -0.26339E + 00, A6 = 0.14211E + 00, A8 = -0.60401E-01, A10 = 0.88379E-02, A12 = 0.21280E-02, A14 = -0.49782E -03
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 2.375
２ ４ 5.501
３ ６ -6.747Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 2.375
2 4 5.501
3 6 -6.747
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．３４７
（２）ｆ１／ｆ２＝０．４３２
（３）Ｐａｉｒ１２／Ｐ＝−１．７６５
（４）ｆ１／ｆ２３＝０．０７２
（５）Ｐａｉｒ２３／Ｐ＝２．４５６
（６）ｄ１／ｆ＝０．２２５
（７）ｄ３／ｆ＝０．２５０
（８）ｄ５／ｆ＝０．１８６
（９）ν３＝３０Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.347
(2) f1 / f2 = 0.432
(3) Pair12 / P = -1.765
(4) f1 / f23 = 0.072
(5) P air23 /P=2.456
(6) d1 / f = 0.225
(7) d3 / f = 0.250
(8) d5 / f = 0.186
(9) ν3 = 30
図１５は実施例８の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。図１６Ａ、Ｂ、Ｃは実施例８の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。 FIG. 15 is a cross-sectional view of the imaging lens of the eighth embodiment. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor. 16A, 16B, and 16C are aberration diagrams (spherical aberration, astigmatism, distortion) of the imaging lens of Example 8. FIGS.
［実施例９］
撮像レンズの全体諸元を以下に示す。
ｆ＝２．４５ｍｍ
ｆＢ＝０．０５ｍｍ
Ｆ＝２．８
２Ｙ＝３．８ｍｍ
ＥＮＴＰ＝０．４７ｍｍ
ＥＸＴＰ＝−２．２ｍｍ
Ｈ１＝０．２６ｍｍ
Ｈ２＝−２．３９ｍｍ[Example 9]
The overall specifications of the imaging lens are shown below.
f = 2.45mm
fB = 0.05mm
F = 2.8
2Y = 3.8mm
ENTP = 0.47mm
EXTP = -2.2mm
H1 = 0.26mm
H2 = -2.39mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 1.060 0.51 1.5305 56 0.65
２（＊） 4.204 0.05 0.42
３(絞り) ∞ 0.40 0.36
４（＊） -0.831 0.56 1.5305 56 0.49
５（＊） -0.788 0.17 0.76
６（＊） 1.699 0.41 1.5830 30 1.23
７（＊） 1.146 0.73 1.41
８ ∞ 0.40 1.5168 64.2 2.00
９ ∞ 2.00The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 1.060 0.51 1.5305 56 0.65
2 (*) 4.204 0.05 0.42
3 (Aperture) ∞ 0.40 0.36
4 (*) -0.831 0.56 1.5305 56 0.49
5 (*) -0.788 0.17 0.76
6 (*) 1.699 0.41 1.5830 30 1.23
7 (*) 1.146 0.73 1.41
8 ∞ 0.40 1.5168 64.2 2.00
9 ∞ 2.00
非球面係数を以下に示す。
第１面
K=-0.24857E+00, A4=0.52032E-01, A6=-0.12883E+00, A8=0.53868E-01, A10=-0.26339E+00, A12=0.48905E+00, A14=-0.21997E+01
第２面
K=0.50000E+02, A4=-0.33027E+00, A6=0.14832E+01, A8=-0.16364E+02, A10=0.57253E+02, A12=-0.71201E+02
第４面
K=-0.38497E+00, A4=-0.21925E+00, A6=-0.57597E+01, A8=0.19371E+02, A10=-0.52486E+02, A12=0.22586E+02
第５面
K=-0.63343E+00, A4=-0.60596E+00, A6=0.16790E+01, A8=-0.28090E+01, A10=-0.29664E+01, A12=0.89990E+01, A14=0.63833E+01, A16=-0.11663E+02
第６面
K=-0.45581E+02, A4=-0.33339E+00, A6=0.19756E+00, A8=-0.12012E-01, A10=-0.11528E-01, A12=-0.11892E-01, A14=0.10527E-01, A16=-0.21503E-02
第７面
K=-0.91637E+01, A4=-0.25481E+00, A6=0.13176E+00, A8=-0.61480E-01, A10=0.14127E-01, A12=0.17427E-02, A14=-0.24788E-02, A16=0.62752E-03The aspheric coefficient is shown below.
First side
K = -0.24857E + 00, A4 = 0.52032E-01, A6 = -0.12883E + 00, A8 = 0.53868E-01, A10 = -0.26339E + 00, A12 = 0.48905E + 00, A14 = -0.21997E +01
Second side
K = 0.50000E + 02, A4 = -0.33027E + 00, A6 = 0.14832E + 01, A8 = -0.16364E + 02, A10 = 0.57253E + 02, A12 = -0.71201E + 02
4th page
K = -0.38497E + 00, A4 = -0.21925E + 00, A6 = -0.57597E + 01, A8 = 0.19371E + 02, A10 = -0.52486E + 02, A12 = 0.22586E + 02
5th page
K = -0.63343E + 00, A4 = -0.60596E + 00, A6 = 0.16790E + 01, A8 = -0.28090E + 01, A10 = -0.29664E + 01, A12 = 0.89990E + 01, A14 = 0.63833E +01, A16 = -0.11663E + 02
6th page
K = -0.45581E + 02, A4 = -0.33339E + 00, A6 = 0.19756E + 00, A8 = -0.12012E-01, A10 = -0.11528E-01, A12 = -0.11892E-01, A14 = 0.10527 E-01, A16 = -0.21503E-02
7th page
K = -0.91637E + 01, A4 = -0.25481E + 00, A6 = 0.13176E + 00, A8 = -0.61480E-01, A10 = 0.14127E-01, A12 = 0.17427E-02, A14 = -0.24788E -02, A16 = 0.62752E-03
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 2.529
２ ４ 5.239
３ ６ -8.347Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 2.529
2 4 5.239
3 6 -8.347
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．２８３
（２）ｆ１／ｆ２＝０．４８３
（３）Ｐａｉｒ１２／Ｐ＝−１．９５９
（４）ｆ１／ｆ２３＝０．１８３
（５）Ｐａｉｒ２３／Ｐ＝２．３９０
（６）ｄ１／ｆ＝０．２０９
（７）ｄ３／ｆ＝０．２２８
（８）ｄ５／ｆ＝０．１６９
（９）ν３＝３０Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.283
(2) f1 / f2 = 0.383
(3) Pair12 / P = -1.959
(4) f1 / f23 = 0.183
(5) P air23 /P=2.390
(6) d1 / f = 0.209
(7) d3 / f = 0.228
(8) d5 / f = 0.169
(9) ν3 = 30
図１７は実施例９の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。図１８Ａ、Ｂ、Ｃは実施例９の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。 FIG. 17 is a cross-sectional view of the imaging lens of Example 9. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor. 18A, 18B, and 18C are aberration diagrams (spherical aberration, astigmatism, distortion) of the imaging lens of Example 9. FIGS.
［実施例１０］
撮像レンズの全体諸元を以下に示す。
ｆ＝２．４５ｍｍ
ｆＢ＝０．０５ｍｍ
Ｆ＝２．８
２Ｙ＝３．８ｍｍ
ＥＮＴＰ＝０．４３ｍｍ
ＥＸＴＰ＝−２．２４ｍｍ
Ｈ１＝０．２５ｍｍ
Ｈ２＝−２．４１ｍｍ[Example 10]
The overall specifications of the imaging lens are shown below.
f = 2.45mm
fB = 0.05mm
F = 2.8
2Y = 3.8mm
ENTP = 0.43mm
EXTP = -2.24mm
H1 = 0.25mm
H2 = -2.41mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 1.172 0.47 1.5305 56 0.64
２（＊） 6.581 0.05 0.44
３(絞り) ∞ 0.51 0.38
４（＊） -0.806 0.49 1.5305 56 0.54
５（＊） -0.788 0.10 0.77
６（＊） 1.604 0.48 1.5830 30 0.26
７（＊） 1.143 0.74 1.45
８ ∞ 0.40 1.5168 64.2 2.00
９ ∞ 2.00The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 1.172 0.47 1.5305 56 0.64
2 (*) 6.581 0.05 0.44
3 (Aperture) ∞ 0.51 0.38
4 (*) -0.806 0.49 1.5305 56 0.54
5 (*) -0.788 0.10 0.77
6 (*) 1.604 0.48 1.5830 30 0.26
7 (*) 1.143 0.74 1.45
8 ∞ 0.40 1.5168 64.2 2.00
9 ∞ 2.00
非球面係数を以下に示す。
第１面
K=-0.43113E+00, A4=0.32381E-01, A6=-0.13033E+00, A8=-0.12156E-01, A10=-0.60494E+00, A12=0.23474E+01, A14=-0.35029E+01
第２面
K=0.49990E+02, A4=-0.24937E+00, A6=0.20236E+01, A8=-0.18847E+02, A10=0.64797E+02, A12=-0.68324E+02
第４面
K=-0.86792E+00, A4=-0.60049E-01, A6=-0.47020E+01, A8=0.12597E+02, A10=-0.21786E+02, A12=0.23459E+02
第５面
K=-0.58616E+00, A4=-0.48630E+00, A6=0.14951E+01, A8=-0.28676E+01, A10=-0.20155E+01, A12=0.11231E+02, A14=0.35871E+00, A16=-0.96649E+01
第６面
K=-0.23998E+02, A4=-0.25339E+00, A6=0.14636E+00, A8=0.48618E-02, A10=-0.11134E-01, A12=-0.14505E-01, A14=0.10215E-01, A16=-0.18238E-02
第７面
K=-0.68357E+01, A4=-0.23593E+00, A6=0.13410E+00, A8=-0.61161E-01, A10=0.12364E-01, A12=0.16622E-02, A14=-0.88844E-03, A16=0.50820E-04The aspheric coefficient is shown below.
First side
K = -0.43113E + 00, A4 = 0.32381E-01, A6 = -0.13033E + 00, A8 = -0.12156E-01, A10 = -0.60494E + 00, A12 = 0.23474E + 01, A14 = -0.35029 E + 01
Second side
K = 0.49990E + 02, A4 = -0.24937E + 00, A6 = 0.20236E + 01, A8 = -0.18847E + 02, A10 = 0.64797E + 02, A12 = -0.68324E + 02
4th page
K = -0.86792E + 00, A4 = -0.60049E-01, A6 = -0.47020E + 01, A8 = 0.12597E + 02, A10 = -0.21786E + 02, A12 = 0.23459E + 02
5th page
K = -0.58616E + 00, A4 = -0.48630E + 00, A6 = 0.14951E + 01, A8 = -0.28676E + 01, A10 = -0.20155E + 01, A12 = 0.11231E + 02, A14 = 0.35871E +00, A16 = -0.96649E + 01
6th page
K = -0.23998E + 02, A4 = -0.25339E + 00, A6 = 0.14636E + 00, A8 = 0.48618E-02, A10 = -0.11134E-01, A12 = -0.14505E-01, A14 = 0.10215E -01, A16 = -0.18238E-02
7th page
K = -0.68357E + 01, A4 = -0.23593E + 00, A6 = 0.13410E + 00, A8 = -0.61161E-01, A10 = 0.12364E-01, A12 = 0.16622E-02, A14 = -0.88844E -03, A16 = 0.50820E-04
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 2.609
２ ４ 6.313
３ ６ -11.021Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 2.609
2 4 6.313
3 6 -11.021
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．２２６
（２）ｆ１／ｆ２＝０．４１３
（３）Ｐａｉｒ１２／Ｐ＝−１．８８４
（４）ｆ１／ｆ２３＝０．１９４
（５）Ｐａｉｒ２３／Ｐ＝２．４８２
（６）ｄ１／ｆ＝０．１９４
（７）ｄ３／ｆ＝０．２０２
（８）ｄ５／ｆ＝０．１９５
（９）ν３＝３０Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.226
(2) f1 / f2 = 0.413
(3) P air12 /P=−1.884
(4) f1 / f23 = 0.194
(5) P air23 /P=2.482
(6) d1 / f = 0.194
(7) d3 / f = 0.002
(8) d5 / f = 0.195
(9) ν3 = 30
図１９は実施例１０の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。図２０Ａ、Ｂ、Ｃは実施例１０の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。 FIG. 19 is a cross-sectional view of the imaging lens of Example 10. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor. 20A, 20B, and 20C are aberration diagrams (spherical aberration, astigmatism, distortion) of the imaging lens of Example 10. FIGS.
［実施例１１］
撮像レンズの全体諸元を以下に示す。
ｆ＝１．８１ｍｍ
ｆＢ＝０．０５ｍｍ
Ｆ＝２．８
２Ｙ＝３ｍｍ
ＥＮＴＰ＝０．３３ｍｍ
ＥＸＴＰ＝−１．５７ｍｍ
Ｈ１＝０．１２ｍｍ
Ｈ２＝−１．７６ｍｍ[Example 11]
The overall specifications of the imaging lens are shown below.
f = 1.81mm
fB = 0.05mm
F = 2.8
2Y = 3mm
ENTP = 0.33mm
EXTP = -1.57mm
H1 = 0.12mm
H2 = -1.76mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 0.800 0.39 1.5447 56 0.47
２（＊） 2.657 0.02 0.28
３(絞り) ∞ 0.29 0.27
４（＊） -0.751 0.48 1.5447 56 0.37
５（＊） -0.631 0.18 0.59
６（＊） 1.296 0.30 1.6320 23 0.95
７（＊） 0.794 0.41 1.16
８ ∞ 0.40 1.5168 64.2 1.55
９ ∞ 1.55The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 0.800 0.39 1.5447 56 0.47
2 (*) 2.657 0.02 0.28
3 (Aperture) ∞ 0.29 0.27
4 (*) -0.751 0.48 1.5447 56 0.37
5 (*) -0.631 0.18 0.59
6 (*) 1.296 0.30 1.6320 23 0.95
7 (*) 0.794 0.41 1.16
8 ∞ 0.40 1.5168 64.2 1.55
9 ∞ 1.55
非球面係数を以下に示す。
第１面
K=0.50624E-01, A4=0.16140E+00, A6=-0.12987E+01, A8=0.81971E+01, A10=-0.11568E+02, A12=-0.79249E+02, A14=0.18423E+03
第２面
K=0.27609E+02, A4=0.24224E+00, A6=-0.14906E+02, A8=0.16140E+03, A10=-0.61808E+03, A12=-0.13792E+04
第４面
K=-0.53764E+01, A4=-0.23297E+01, A6=-0.12432E+02, A8=0.64232E+02, A10=-0.34073E+03, A12=0.40767E+03
第５面
K=-0.68896E+00, A4=-0.11893E+01, A6=0.42515E+01, A8=-0.14599E+02, A10=0.41393E+00, A12=0.58783E+02
第６面
K=-0.28846E+02, A4=-0.81122E+00, A6=0.69385E+00, A8=0.16882E+00, A10=-0.21989E+00, A12=-0.22012E+00, A14=0.10335E+00
第７面
K=-0.75115E+01, A4=-0.51717E+00, A6=0.47650E+00, A8=-0.37294E+00, A10=0.14919E+00, A12=0.34438E-01, A14=-0.40873E-01The aspheric coefficient is shown below.
First side
K = 0.50624E-01, A4 = 0.16140E + 00, A6 = -0.12987E + 01, A8 = 0.81971E + 01, A10 = -0.11568E + 02, A12 = -0.79249E + 02, A14 = 0.18423E + 03
Second side
K = 0.27609E + 02, A4 = 0.24224E + 00, A6 = -0.14906E + 02, A8 = 0.16140E + 03, A10 = -0.61808E + 03, A12 = -0.13792E + 04
4th page
K = -0.53764E + 01, A4 = -0.23297E + 01, A6 = -0.12432E + 02, A8 = 0.64232E + 02, A10 = -0.34073E + 03, A12 = 0.40767E + 03
5th page
K = -0.68896E + 00, A4 = -0.11893E + 01, A6 = 0.42515E + 01, A8 = -0.14599E + 02, A10 = 0.41393E + 00, A12 = 0.58783E + 02
6th page
K = -0.28846E + 02, A4 = -0.81122E + 00, A6 = 0.69385E + 00, A8 = 0.16882E + 00, A10 = -0.21989E + 00, A12 = -0.22012E + 00, A14 = 0.10335E +00
7th page
K = -0.75115E + 01, A4 = -0.51717E + 00, A6 = 0.47650E + 00, A8 = -0.37294E + 00, A10 = 0.14919E + 00, A12 = 0.34438E-01, A14 = -0.40873E -01
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 1.956
２ ４ 3.022
３ ６ -4.212Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 1.956
2 4 3.022
3 6 -4.212
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．３９８
（２）ｆ１／ｆ２＝０．６４７
（３）Ｐａｉｒ１２／Ｐ＝−１．７７０
（４）ｆ１／ｆ２３＝０．２０１
（５）Ｐａｉｒ２３／Ｐ＝２．３１４
（６）ｄ１／ｆ＝０．２１５
（７）ｄ３／ｆ＝０．２６３
（８）ｄ５／ｆ＝０．１６５
（９）ν３＝２３Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.398
(2) f1 / f2 = 0.647
(3) Pair12 / P = -1.770
(4) f1 / f23 = 0.201
(5) P air23 /P=2.314
(6) d1 / f = 0.215
(7) d3 / f = 0.263
(8) d5 / f = 0.165
(9) ν3 = 23
図２１は実施例１１の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。図２２Ａ、Ｂ、Ｃは実施例１１の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。 FIG. 21 is a cross-sectional view of the imaging lens of Example 11. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor. 22A, 22B, and 22C are aberration diagrams (spherical aberration, astigmatism, distortion) of the imaging lens of Example 11. FIG.
［実施例１２］
撮像レンズの全体諸元を以下に示す。
ｆ＝１．８７ｍｍ
ｆＢ＝０．０４ｍｍ
Ｆ＝２．８
２Ｙ＝３ｍｍ
ＥＮＴＰ＝０．３８ｍｍ
ＥＸＴＰ＝−１．５９ｍｍ
Ｈ１＝０．１１ｍｍ
Ｈ２＝−１．８２ｍｍ[Example 12]
The overall specifications of the imaging lens are shown below.
f = 1.87mm
fB = 0.04mm
F = 2.8
2Y = 3mm
ENTP = 0.38mm
EXTP = -1.59mm
H1 = 0.11mm
H2 = -1.82mm
撮像レンズの面データを以下に示す。
面番号 Ｒ(mm) Ｄ(mm) Nd νd 有効半径(mm)
１（＊） 0.901 0.45 1.5447 5 6 0.51
２（＊） 3.563 0.02 0.29
３(絞り) ∞ 0.30 0.28
４（＊） -0.824 0.50 1.5447 56 0.39
５（＊） -0.705 0.13 0.60
６（＊） 1.448 0.42 1.6320 23 0.90
７（＊） 0.904 0.40 1.17
８ ∞ 0.40 1.5168 64.2 1.55
９ ∞ 1.55The surface data of the imaging lens is shown below.
Surface number R (mm) D (mm) Nd νd Effective radius (mm)
1 (*) 0.901 0.45 1.5447 5 6 0.51
2 (*) 3.563 0.02 0.29
3 (Aperture) ∞ 0.30 0.28
4 (*) -0.824 0.50 1.5447 56 0.39
5 (*) -0.705 0.13 0.60
6 (*) 1.448 0.42 1.6320 23 0.90
7 (*) 0.904 0.40 1.17
8 ∞ 0.40 1.5168 64.2 1.55
9 ∞ 1.55
非球面係数を以下に示す。
第１面
K=-0.10394E-01, A4=0.15118E+00, A6=-0.13121E+01, A8=0.79872E+01, A10=-0.18868E+02, A12=-0.94095E+01, A14=0.53730E+02
第２面
K=0.50000E+02, A4=0.31655E+00, A6=-0.16421E+02, A8=0.18682E+03, A10=-0.70024E+03, A12=-0.13792E+04
第４面
K=-0.99080E+01, A4=-0.27180E+01, A6=-0.48675E+01, A8=0.23637E+02, A10=-0.16484E+03, A12=0.40767E+03
第５面
K=-0.49400E+00, A4=-0.15898E+01, A6=0.59970E+01, A8=-0.19573E+02, A10=0.15931E+02, A12=0.26489E+02
第６面
K=-0.33599E+02, A4=-0.88704E+00, A6=0.86393E+00, A8=0.18337E+00, A10=-0.46032E+00, A12=-0.96367E-01, A14=0.97275E-01
第７面
K=-0.62558E+01, A4=-0.48831E+00, A6=0.45103E+00, A8=-0.32778E+00, A10=0.12204E+00, A12=0.12625E-01, A14=-0.19446E-01The aspheric coefficient is shown below.
First side
K = -0.10394E-01, A4 = 0.15118E + 00, A6 = -0.13121E + 01, A8 = 0.79872E + 01, A10 = -0.18868E + 02, A12 = -0.94095E + 01, A14 = 0.53730E +02
Second side
K = 0.50000E + 02, A4 = 0.31655E + 00, A6 = -0.16421E + 02, A8 = 0.18682E + 03, A10 = -0.70024E + 03, A12 = -0.13792E + 04
4th page
K = -0.99080E + 01, A4 = -0.27180E + 01, A6 = -0.48675E + 01, A8 = 0.23637E + 02, A10 = -0.16484E + 03, A12 = 0.40767E + 03
5th page
K = -0.49400E + 00, A4 = -0.15898E + 01, A6 = 0.59970E + 01, A8 = -0.19573E + 02, A10 = 0.15931E + 02, A12 = 0.26489E + 02
6th page
K = -0.33599E + 02, A4 = -0.88704E + 00, A6 = 0.86393E + 00, A8 = 0.18337E + 00, A10 = -0.46032E + 00, A12 = -0.96367E-01, A14 = 0.97275E -01
7th page
K = -0.62558E + 01, A4 = -0.48831E + 00, A6 = 0.45103E + 00, A8 = -0.32778E + 00, A10 = 0.12204E + 00, A12 = 0.12625E-01, A14 = -0.19446E -01
撮像レンズの単レンズデータを以下に示す。
レンズ 始面 焦点距離(mm)
１ １ 2.089
２ ４ 3.629
３ ６ -5.450Single lens data of the imaging lens is shown below.
Lens Start surface Focal length (mm)
1 1 2.089
2 4 3.629
3 6 -5.450
条件式（１）〜（９）に対応する値を以下に示す。
（１）ｆ１２／ｆ３＝−０．３３７
（２）ｆ１／ｆ２＝０．５７６
（３）Ｐａｉｒ１２／Ｐ＝−１．５７９
（４）ｆ１／ｆ２３＝０．２３０
（５）Ｐａｉｒ２３／Ｐ＝２．１７２
（６）ｄ１／ｆ＝０．２３９
（７）ｄ３／ｆ＝０．２６５
（８）ｄ５／ｆ＝０．２２７
（９）ν３＝２３Values corresponding to conditional expressions (1) to (9) are shown below.
(1) f12 / f3 = −0.337
(2) f1 / f2 = 0.576
(3) P air12 /P=−1.579
(4) f1 / f23 = 0.230
(5) P air23 /P=2.172
(6) d1 / f = 0.239
(7) d3 / f = 0.265
(8) d5 / f = 0.227
(9) ν3 = 23
図２３は実施例１２の撮像レンズの断面図である。図中、Ｌ１は第１レンズ、Ｌ２は第２レンズ、Ｌ３は第３レンズ、Ｓは開口絞りを示す。また、Ｆは光学的ローパスフィルター、ＩＲカットフィルタ若しくは固体撮像素子のシールガラス等を想定した平行平板である。図２４Ａ、Ｂ、Ｃは実施例１２の撮像レンズの収差図（球面収差、非点収差、歪曲収差）である。 FIG. 23 is a cross-sectional view of the imaging lens of Example 12. In the figure, L1 is a first lens, L2 is a second lens, L3 is a third lens, and S is an aperture stop. F is a parallel plate assuming an optical low-pass filter, an IR cut filter, or a seal glass of a solid-state image sensor. 24A, B, and C are aberration diagrams (spherical aberration, astigmatism, distortion) of the imaging lens of Example 12. FIG.
なお、以上の各実施例において、固体撮像素子の撮像面に入射する光束の主光線入射角については、撮像面の周辺部において必ずしも充分に小さい設計にはなっていない。しかし、最近の技術では、固体撮像素子の色フィルタやオンチップマイクロレンズアレイの配列の見直しによって、シェーディングを軽減することがでるようになってきた。具体的には、撮像素子の撮像面の画素ピッチに対し、色フィルタやオンチップマイクロレンズアレイの配列のピッチをわずかに小さく設定する。それにより、撮像面の周辺部にいくほど各画素に対し色フィルタやオンチップマイクロレンズアレイが撮像レンズ光軸側へシフトし、斜入射の光束を効率的に各画素の受光部に導くことができる。これにより固体撮像素子で発生するシェーディングを小さく抑えることができる。各実施例は、以上の点が緩和された分について、より小型化を目指した設計例となっている。 In each of the above embodiments, the chief ray incident angle of the light beam incident on the imaging surface of the solid-state imaging device is not necessarily designed to be sufficiently small in the peripheral portion of the imaging surface. However, recent techniques have made it possible to reduce shading by reviewing the arrangement of the color filters of the solid-state imaging device and the on-chip microlens array. Specifically, the pitch of the arrangement of the color filters and the on-chip microlens array is set slightly smaller than the pixel pitch on the imaging surface of the imaging device. As a result, the color filter or on-chip microlens array shifts toward the optical axis of the imaging lens for each pixel as it goes to the periphery of the imaging surface, and the obliquely incident light flux can be efficiently guided to the light receiving unit of each pixel. it can. Thereby, the shading which generate | occur | produces with a solid-state image sensor can be restrained small. Each embodiment is a design example aiming at further miniaturization for the amount of the above points alleviated.
本発明は、明細書に記載の実施例に限定されるものではなく、他の実施例・変形例を含むことは、本明細書に記載された実施例や思想から本分野の当業者にとって明らかである。例えば、実質的に屈折力を持たないダミーレンズを更に付与した場合でも本発明の適用範囲内である。 The present invention is not limited to the embodiments described in the specification, and other embodiments and modifications are apparent to those skilled in the art from the embodiments and ideas described in the present specification. It is. For example, even when a dummy lens having substantially no refractive power is further provided, it is within the scope of application of the present invention.
Ｌ１ 第１レンズ
Ｌ２ 第２レンズ
Ｌ３ 第３レンズ
Ｓ 開口絞り
Ｆ 平行平板L1 1st lens L2 2nd lens L3 3rd lens S Aperture stop F Parallel plate
Claims (6)
物体側から順に、
正の屈折力を有し物体側に凸面を向けたメニスカス形状の第１レンズと、
開口絞りと、
正の屈折力を有し像側に凸面を向けたメニスカス形状の第２レンズと、
負の屈折力を有し像側に凹面を向けた第３レンズとから構成され、
以下の条件式を満足することを特徴とする撮像レンズ。
−０．４５＜ｆ１２／ｆ３＜−０．２
０．４１＜ｆ１／ｆ２＜０．７３
−２．１５＜Ｐａｉｒ１２／Ｐ＜−１．４５
但し、
ｆ１２：前記第１レンズと前記第２レンズとの合成焦点距離
ｆ３：前記第３レンズの焦点距離
ｆ１：前記第１レンズの焦点距離
ｆ２：前記第２レンズの焦点距離
Ｐ：撮像レンズ全系の屈折力
Ｐａｉｒ１２：前記第１レンズの像側面と前記第２レンズの物体側面とにより形成されるいわゆる空気レンズの屈折力であり、以下の条件式で求める。
Ｐａｉｒ１２＝（１−Ｎ１）／Ｒ２＋（Ｎ２−１）／Ｒ３−｛（（１−Ｎ１）・（Ｎ２−１））／（Ｒ２・Ｒ３）｝・Ｄ２
但し、
Ｎ１：前記第１レンズのｄ線に対する屈折率
Ｎ２：前記第２レンズのｄ線に対する屈折率
Ｒ２：前記第１レンズの像側面の曲率半径
Ｒ３：前記第２レンズの物体側面の曲率半径
Ｄ２：前記第１レンズと前記第２レンズの軸上の空気間隔An imaging lens for forming a subject image on a photoelectric conversion unit of a solid-state imaging device,
From the object side,
A first meniscus lens having positive refractive power and having a convex surface facing the object side;
An aperture stop,
A second meniscus lens having positive refractive power and having a convex surface facing the image side;
A third lens having negative refractive power and having a concave surface facing the image side,
An imaging lens satisfying the following conditional expression:
−0.45 <f12 / f3 <−0.2
0.41 <f1 / f2 <0.73
-2.15 <P air12 /P<-1.45
However,
f12: The combined focal length of the first lens and the second lens f3: The focal length of the third lens f1: The focal length of the first lens f2: The focal length of the second lens P: The entire imaging lens system Refractive power P air12 : This is the refractive power of a so-called air lens formed by the image side surface of the first lens and the object side surface of the second lens, and is determined by the following conditional expression.
P air12 = (1-N1) / R2 + (N2-1) / R3-{((1-N1) · (N2-1)) / (R2 · R3)} · D2
However,
N1: Refractive index with respect to d-line of the first lens N2: Refractive index with respect to d-line of the second lens R2: Radius of curvature of the image side surface of the first lens R3: Radius of curvature of the object side surface of the second lens D2: Air spacing on the axis of the first lens and the second lens
０．０６＜ｆ１／ｆ２３＜０．３
但し、
ｆ１：前記第１レンズの焦点距離
ｆ２３：前記第２レンズと前記第３レンズとの合成焦点距離The imaging lens according to claim 1, wherein the following conditional expression is satisfied.
0.06 <f1 / f23 <0.3
However,
f1: Focal length of the first lens f23: Composite focal length of the second lens and the third lens
２．１＜Ｐａｉｒ２３／Ｐ＜２．８
但し、
Ｐ：撮像レンズ全系の屈折力
Ｐａｉｒ２３：前記第２レンズの像側面と前記第３レンズの物体側面とにより形成されるいわゆる空気レンズの屈折力であり、以下の条件式で求める。
Ｐａｉｒ２３＝（１−Ｎ２）／Ｒ４＋（Ｎ３−１）／Ｒ５−｛（（１−Ｎ２）・（Ｎ３−１））／（Ｒ４・Ｒ５）｝・Ｄ４
但し、
Ｎ２：前記第２レンズのｄ線に対する屈折率
Ｎ３：前記第３レンズのｄ線に対する屈折率
Ｒ４：前記第２レンズの像側面の曲率半径
Ｒ５：前記第３レンズの物体側面の曲率半径
Ｄ４：前記第２レンズと前記第３レンズの軸上の空気間隔The imaging lens according to claim 1, wherein the following conditional expression is satisfied.
2.1 < Pair23 / P <2.8
However,
P: Refractive power of the entire imaging lens system P air23 : Refractive power of a so-called air lens formed by the image side surface of the second lens and the object side surface of the third lens, which is obtained by the following conditional expression.
P air23 = (1-N2) / R4 + (N3-1) / R5-{((1-N2) · (N3-1)) / (R4 · R5)} · D4
However,
N2: Refractive index with respect to d line of the second lens N3: Refractive index with respect to d line of the third lens R4: Radius of curvature of the image side surface of the second lens R5: Radius of curvature of the object side surface of the third lens D4: Air spacing on the axis of the second lens and the third lens
０．１８＜Ｄ１／ｆ＜０．３
０．１８＜Ｄ３／ｆ＜０．３
０．１２＜Ｄ５／ｆ＜０．２５
但し、
Ｄ１：前記第１レンズの軸上厚
Ｄ３：前記第２レンズの軸上厚
Ｄ５：前記第３レンズの軸上厚
ｆ：撮像レンズ全系の焦点距離The imaging lens according to claim 1, wherein the following conditional expression is satisfied.
0.18 <D1 / f <0.3
0.18 <D3 / f <0.3
0.12 <D5 / f <0.25
However,
D1: Axial thickness of the first lens D3: Axial thickness of the second lens D5: Axial thickness of the third lens f: Focal length of the entire imaging lens system
１５＜νｄ３＜３５
但し、
νｄ３：前記第３レンズのアッベ数The third lens has an object side surface and an image side surface formed as aspherical surfaces, has a negative refractive power in the vicinity of the optical axis and a positive refractive power in the peripheral portion, and satisfies the following conditional expression: The imaging lens according to claim 1, characterized in that:
15 <νd3 <35
However,
νd3: Abbe number of the third lens
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| TWI537589B (en) | 2015-01-07 | 2016-06-11 | 大立光電股份有限公司 | Optical imaging system, image capturing unit and electronic device |
| CN105739063A (en) * | 2016-04-13 | 2016-07-06 | 中山市众盈光学有限公司 | Cell phone imaging lens |
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