JPH0625825B2 - Small zoom lens - Google Patents
Small zoom lensInfo
- Publication number
- JPH0625825B2 JPH0625825B2 JP59209193A JP20919384A JPH0625825B2 JP H0625825 B2 JPH0625825 B2 JP H0625825B2 JP 59209193 A JP59209193 A JP 59209193A JP 20919384 A JP20919384 A JP 20919384A JP H0625825 B2 JPH0625825 B2 JP H0625825B2
- Authority
- JP
- Japan
- Prior art keywords
- lens
- object side
- fii
- lens group
- negative
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
- G02B15/1421—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only the first group being positive
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Description
【発明の詳細な説明】 本発明は小型のズームレンズに関し、特にレンズシヤツ
ターカメラ、ビデオカメラ等において有効なレンズ全長
（第１レンズ面から結像面までの距離）の短い小型のズ
ームレンズに関するものである。The present invention relates to a small zoom lens, and more particularly to a small zoom lens having a short overall lens length (distance from the first lens surface to the image forming surface) effective in a lens shutter camera, a video camera and the like. It is a thing.
最近レンズシヤツターカメラ、ビデオカメラ等の小型化
に伴いレンズ全長の短い小型のズームレンズが要望され
ている。特にレンズシヤツターカメラ等のレンズ交換を
行なわない小型カメラの分野でもズームレンズの装着が
望まれ従来用いていた単焦点レンズと同程度の長さの小
型のズームレンズが要望されている。Recently, with the downsizing of lens shutter cameras, video cameras, etc., there has been a demand for a compact zoom lens having a short overall lens length. In particular, even in the field of small cameras such as lens shutter cameras where lenses are not exchanged, it is desired to mount a zoom lens, and there is a demand for a small zoom lens having a length about the same as that of a conventional single focus lens.
通常レンズシヤツターカメラで多用されている標準画角
（撮影画角2ω＝47度で35mmスチールカメラに換算する
と焦点距離50mm程度）を含むズームレンズは例えば特公
昭49-29146号公報をはじめ多数提案されている。この種
のズームレンズは物体側より順に負の屈折力の第１レン
ズ群と正の屈折力の第２レンズ群の２つのレンズ群より
構成し両レンズ群の間隔を変えて変倍するものであるが
物体側より順に負と正の屈折力配置となつている為にバ
ツクフオーカスが比較的長くなり一眼レフレツクスカメ
ラとしては好ましい構成であるがレンズシヤツターカメ
ラとしてはレンズ全長が長すぎる傾向があつた。A lot of zoom lenses including the standard angle of view that is often used in ordinary lens shutter cameras (focal length 2ω = 47 degrees and focal length of about 50 mm when converted to a 35 mm still camera) are proposed, for example, in Japanese Patent Publication No. Sho 49-29146. Has been done. This type of zoom lens is composed of two lens groups, a first lens group having a negative refractive power and a second lens group having a positive refractive power, in order from the object side. However, since the negative and positive refracting powers are arranged in order from the object side, the back focus is relatively long, which is a preferable configuration for a single-lens reflex camera, but the lens overall length tends to be too long for a lens shutter camera. Atsuta
本出願人は先に特開昭57−201213号公報において物体側
より順に正の屈折力の第１レンズ群と負の屈折力の第２
レンズ群の２つのレンズ群で構成し、両レンズ群の間隔
を変えて変倍する小型ズームレンズを提案した。同公報
においては物体側より順に正、負の屈折力配置を採用し
ている為にバツクフオーカスを比較的短くし、しかもレ
ンズ全長の短いズームレンズを達成している。The applicant of the present invention has previously disclosed that in JP-A-57-201213, the first lens unit having a positive refractive power and the second lens unit having a negative refractive power are sequentially arranged from the object side.
We proposed a compact zoom lens that consists of two lens groups and changes the distance between both lens groups to change the magnification. In this publication, since the positive and negative refractive power arrangements are sequentially adopted from the object side, the back focus is relatively short and a zoom lens having a short total lens length is achieved.
本発明は同公報で提案したズームレンズの諸収差のうち
特に像面湾曲を少なくし画面全体にわたり良好なる収差
補正を達成した小型のズームレンズの提供を目的とす
る。It is an object of the present invention to provide a compact zoom lens that achieves excellent aberration correction over the entire screen by reducing the curvature of field among various aberrations of the zoom lens proposed in the publication.
本発明の目的を達成する為の小型のズームレンズの主た
る特徴は、物体側より順に正の屈折力の第１レンズ群と
負の屈折力の第２レンズ群の２つのレンズ群を有し、両
レンズ群の間隔を変えて変倍を行うズームレンズにおい
て、前記第２レンズ群を物体側より順に物体側へ凸面を
向けた負の屈折力のメニスカス状の第２−１レンズと像
面側に凸面を向けた負の屈折力のメニスカス状の第２−
２レンズより構成し、該第２−１レンズの像面側のレン
ズ面の曲率半径をＲII２，該第２−２レンズの物体側の
レンズ面の曲率半径をＲII３、該第２−１レンズと第２
−２レンズの焦点距離を各々ｆII１，ｆII２、該第レン
ズ群と第２レンズ群の焦点距離を各々Ｆ１，Ｆ２、該第
１レンズ群と第２レンズ群の全変倍における移動量を各
々Ｓ１，Ｓ２、広角端のズーム位置での全系の焦点距離
をｆｗとするとき、 −２．０＜ｆII２／ｆｗ＜−０．８ ……（１） −１．０＜ＲII３／ｆｗ＜−０．１５ ……（２） ０．８＜ＲII２／ｆｗ＜５．０ ……（３） −１．５＜Ｆ１／Ｆ２＜−０．６ ……（４） ０．４＜Ｓ１／Ｓ２＜０．９ ……（５） ２．０＜ｆII１／ｆII２＜３．８ ……（６） なる条件を満足することを特徴としている。The main feature of the small-sized zoom lens for achieving the object of the present invention is to have two lens groups, a first lens group having a positive refractive power and a second lens group having a negative refractive power, in order from the object side. In a zoom lens that performs zooming by changing the distance between both lens groups, a meniscus-shaped second lens 2-1 having a negative refractive power with the second lens group having a convex surface directed from the object side to the object side, and the image plane side. The negative meniscus-shaped second convex surface facing the second
Two lenses, the radius of curvature of the image side lens surface of the 2-1 lens is RII 2 , the radius of curvature of the object side lens surface of the 2-2 lens is RII 3 , and the 2-1 Lens and second
-2, the focal lengths of the lenses are fII 1 and fII 2 , the focal lengths of the first lens group and the second lens group are F 1 and F 2 , respectively, and the movements of the first lens group and the second lens group at all magnification changes. When the respective amounts are S 1 and S 2 , and the focal length of the entire system at the zoom position at the wide-angle end is fw, −2.0 <fII 2 /fw<−0.8 (1) −1.0 <RII 3 /fw<−0.15 (2) 0.8 <RII 2 / fw <5.0 (3) −1.5 <F 1 / F 2 <−0.6 (( 4) 0.4 <S 1 / S 2 <0.9 (5) 2.0 <fII 1 / fII 2 <3.8 (6) The condition is satisfied.
次に本発明の小型のズームレンズの構成と作用を述べ
る。Next, the structure and operation of the compact zoom lens of the present invention will be described.
第１図に本発明の一実施例の屈折力配置を示す。同図に
おいて(A)は広角端、(B)は望遠端でのズーム位置を示
す。同図においてｆＩは正の屈折力の第１レンズ群、ｆ
IIは負の屈折力の第２レンズ群であり、両レンズ群の間
隔を減少させながら両レンズ群を物体側へ移動させて変
倍を行つている。このような屈折力配置により、本実施
例に示される通り、広角端でのレンズ全長を最小とした
バツクフオーカスの短いズームレンズを達成している。FIG. 1 shows a refractive power arrangement according to an embodiment of the present invention. In the figure, (A) shows the zoom position at the wide-angle end, and (B) shows the zoom position at the telephoto end. In the figure, f I is the first lens unit having a positive refractive power, and f I
Reference numeral II denotes a second lens unit having a negative refractive power, which moves the both lens units toward the object side while reducing the distance between the two lens units to perform zooming. With such a refracting power arrangement, as shown in the present embodiment, a zoom lens with a short back focus and a minimum lens length at the wide-angle end is achieved.
本発明は第２レンズ群ｆIIのレンズ形状を前述の如く設
定することにより全変倍範囲にわたり画面中間から周辺
にかけての像面湾曲を小さくし良好なる光学性能を得て
いる。すなわち第２レンズ群を負の屈折力の２枚のレン
ズで構成し、正の屈折力のレンズを含まないようにし、
ペツツバール和の負の方向への増大を防止し全変倍範囲
にわたり像面湾曲の変動を少なくしている。しかも物体
側より順に物体側に凸を向けている負のメニスカスレン
ズ、物体側に凹を向けている負のメニスカスレンズとい
う互いに対称な構成にしたため第２レンズ群での各レン
ズの収差を互いに打ち消し合う効果を持ち、収差の発生
量は少なく押えることが可能となる。According to the present invention, by setting the lens shape of the second lens group f II as described above, the field curvature from the middle of the screen to the periphery is reduced over the entire zoom range to obtain good optical performance. That is, the second lens group is composed of two lenses having negative refracting power, and no lens having positive refracting power is included.
It prevents the Petzval sum from increasing in the negative direction and reduces the fluctuation of the field curvature over the entire zoom range. Moreover, since the negative meniscus lens having a convex surface directed toward the object side and the negative meniscus lens having a concave surface directed toward the object side are symmetrical to each other, the aberrations of the respective lenses in the second lens group cancel each other out. It has a matching effect, and it is possible to suppress the generation amount of aberration to be small.
次に前述の条件式（１）〜（６）の技術的意味について
説明する。Next, the technical meanings of the conditional expressions (1) to (6) will be described.
条件式(1)は変倍に際して像面湾曲の変動を小さくし、
平坦な像面を得る為のものであり条件式(1)の上限値を
越えて第２−２レンズの屈折力が強くなるとペツツバー
ル和が負の方向へ増大し、像面湾曲が正の方向へ倒れて
くる。又下限値を越えると第２−２レンズの屈折力が弱
くなりずき第２−１レンズへの負の屈折力の分担が大き
くなり変倍によるコマ収差や像面湾曲の変動が大きくな
つてくるので好ましくない。Conditional expression (1) reduces the fluctuation of the field curvature during zooming,
This is for obtaining a flat image surface. When the upper limit of conditional expression (1) is exceeded and the refracting power of the 2-2 lens becomes strong, the Petzval sum increases in the negative direction, and the field curvature becomes in the positive direction. To fall down. If the lower limit is exceeded, the refracting power of the 2-2nd lens will be weakened, and the negative refracting power will be largely shared by the 2-1st lens. It is not preferable because it will come.
条件式(2)の上限値を越えると特に広角端のズーム位置
での像面湾曲が正の方向へ増大し又変倍による像面湾曲
の変動が大きくなつてくる。又下限値を越えると広角端
での内向性のコマ収差が増大してくるので好ましくな
い。If the upper limit of conditional expression (2) is exceeded, the field curvature at the wide-angle end zoom position will increase in the positive direction, and the variation of the field curvature due to zooming will increase. On the other hand, when the value goes below the lower limit, inward coma at the wide-angle end increases, which is not preferable.
本発明においては前述の第２−２レンズのレンズ形状と
共に像面湾曲を小さくする為には第２−１レンズの像面
側のレンズ面の曲率半径が条件式（３）を満足するのが
良い。In the present invention, in order to reduce the curvature of field along with the lens shape of the 2-2nd lens, the radius of curvature of the lens surface on the image side of the 2-1st lens should satisfy the conditional expression (3). good.
条件式(3)の上限値を越えると像面は補正過剰となり又
下限値を越えると逆に像面は補正不足となつてくる。If the upper limit of conditional expression (3) is exceeded, the image plane will be overcorrected, and if the lower limit is exceeded, the image plane will be undercorrected.
更に本発明において変倍による諸収差、特に球面収差、
コマ収差の変動を少なくし、効率的に変倍を行つた小型
のズームレンズを達成するには条件式（４），（５）を
満足するのが良い。Further, in the present invention, various aberrations due to zooming, particularly spherical aberration,
It is preferable to satisfy the conditional expressions (4) and (5) in order to reduce the fluctuation of the coma aberration and achieve a compact zoom lens that efficiently performs the zooming.
条件式(4)は第１レンズ群と第２レンズ群の屈折力をバ
ランス良く保ち変倍による収差変動を少なくすると共に
効率良く変倍を行う為であり、条件式(4)の下限値を越
えて第１レンズ群の屈折力が弱まつてくるとバツクフオ
ーカスが長くなりレンズ全長も長くなつてきて小型のズ
ームレンズを達成するのが難しくなり又上限値を越える
とレンズ全長は短くなるが球面収差及び画面中間部でコ
マ収差が多く発生してくる。Conditional expression (4) is for keeping the refracting powers of the first lens group and the second lens group in good balance to reduce aberration fluctuation due to zooming and for efficient zooming. The lower limit of conditional expression (4) is If the refracting power of the first lens group becomes weaker than that, the back focus becomes longer and the total lens length becomes longer, making it difficult to achieve a small zoom lens. If the upper limit is exceeded, the total lens length becomes short but spherical. A lot of coma occurs in the aberration and the middle part of the screen.
条件式(5)は条件式(4)のもとで効率的に変倍を行う為の
ものであり条件式(5)の上限値を越えて第１レンズ群の
移動量が多くなると望遠端でのレンズ全長が長くなりす
ぎ更に第１レンズ群と第２レンズ群が平行移動に近くな
り所定の変倍比を得るのが困難となる。又下限値を越え
ると第１レンズ群に比べ第２レンズ群の移動量が多すぎ
この結果第１レンズ群と干渉してくるので好ましくな
い。Conditional expression (5) is for efficient zooming under conditional expression (4). If the upper limit of conditional expression (5) is exceeded and the amount of movement of the first lens unit increases, the telephoto end In this case, the total lens length becomes too long, and the first lens group and the second lens group become closer to parallel movement, which makes it difficult to obtain a predetermined zoom ratio. On the other hand, if the value goes below the lower limit, the amount of movement of the second lens group is too large as compared with that of the first lens group, resulting in interference with the first lens group, which is not preferable.
又本発明は条件式（４）のもとで条件式（６）を満足す
るように第２−１レンズと第２−２レンズの屈折力を設
定するのが好ましい。Further, in the present invention, it is preferable to set the refracting powers of the 2-1 lens and the 2-2 lens under the conditional expression (4) so as to satisfy the conditional expression (6).
条件式(6)の上限値を越えて第２−１レンズの屈折力が
弱くなると第２−２レンズの負の屈折力の分担が大きく
なりすぎ広角端でのコマ収差が多く発生し逆に下限値を
越えて第２−１レンズの屈折力が強くなりすぎると変倍
に際し非点収差及び像面湾曲の変動量が多くなつてく
る。When the upper limit of conditional expression (6) is exceeded and the refracting power of the 2-1st lens becomes weak, the negative refracting power of the 2nd-2nd lens becomes so large that a large amount of coma occurs at the wide-angle end, and conversely. When the value goes below the lower limit and the refracting power of the 2-1st lens becomes too strong, the amount of fluctuation of astigmatism and curvature of field increases during zooming.
本発明において第１レンズ群を物体側より順に正、負、
正そして正の屈折力の４つのレンズ若しくは正、負、負
そして正の屈折力の４つのレンズ若しくは正、正、負そ
して正の屈折力の４つのレンズ若しくは正、負そして正
の屈折力の３つのレンズで構成するのが好ましい。In the present invention, the first lens group is arranged in order from the object side positive, negative,
Positive and positive power 4 lenses or positive, negative, negative and positive power 4 lenses or positive, positive, negative and positive power 4 lenses or positive, negative and positive power It is preferably composed of three lenses.
尚本発明において画面全体にわたりより良好なる光学性
能を得る為には第２−２レンズの少なくとも１つのレン
ズ面をレンズ周辺部にいくに従い負の屈折力が増大する
形状の非球面とするのが好ましい。これによつて特に変
倍中間部での像面湾曲の補正不足側への変動をより少な
くすることができる。In the present invention, in order to obtain better optical performance over the entire screen, at least one lens surface of the 2-2nd lens should be an aspherical surface whose negative refractive power increases toward the lens periphery. preferable. As a result, it is possible to further reduce the fluctuation of the field curvature to the undercorrected side, especially at the variable power intermediate portion.
本発明においてフオーカシングはレンズ系全体を繰り出
して行うのが収差変動が少なくて好ましいが第１レンズ
群若しくは第２レンズ群のみを移動させて行つても良
い。これによればレンズ鏡筒が簡単となる。In the present invention, focusing is preferably performed by extending the entire lens system because the variation in aberration is small, but it is also possible to move only the first lens group or the second lens group. This simplifies the lens barrel.
以上のように本発明によれば変倍による収差変動、特に
像面湾曲の変動を少なくし画面全体にわたり良好なる収
差補正を達成した小型のズームレンズを達成することが
できる。As described above, according to the present invention, it is possible to achieve a small-sized zoom lens that reduces aberration fluctuations due to zooming, particularly field curvature fluctuations, and that achieves excellent aberration correction over the entire screen.
次に本発明の数値実施例を示す。数値実施例においてRi
は物体側より順に第ｉ番目のレンズ面の曲率半径、Diは
物体側より第ｉ番目のレンズ厚及び空気間隔、Niとνi
は各々物体側より順に第ｉ番目のレンズのカメラの屈折
率とアツベ数である。Next, numerical examples of the present invention will be shown. Ri in the numerical examples
Is the radius of curvature of the i-th lens surface in order from the object side, Di is the i-th lens thickness and air gap from the object side, and Ni and νi
Is the refractive index and Abbé number of the camera of the i-th lens in order from the object side.
又前述の各条件式と本発明の各数値実施例との関係を表
−１に示す。Table 1 shows the relationship between the above-mentioned conditional expressions and each numerical example of the present invention.
数値実施例１ 数値実施例２ 数値実施例３ 数値実施例４ 数値実施例５ 数値実施例６ 数値実施例７ Numerical Example 1 Numerical Example 2 Numerical Example 3 Numerical Example 4 Numerical Example 5 Numerical Example 6 Numerical Example 7
第１図は本発明の一実施例の屈折力配置の説明図、第２
図〜第５図は各々本発明の数値実施例１，５，６，７の
レンズ断面図、第６図〜第９図は各々本発明の数値実施
例１，５，６，７の諸収差図である。 図中(A)は広角端、(B)は望遠端を示す。 S.Cは正弦条件、△Ｍはメリデイオナル像面、△Ｓはサ
ジタル像面、ｄはｄ線、ｇはｇ線を示す。FIG. 1 is an explanatory view of a refractive power arrangement according to an embodiment of the present invention, and FIG.
FIGS. 5 to 5 are lens sectional views of Numerical Embodiments 1, 5, 6 and 7 of the present invention respectively, and FIGS. 6 to 9 are various aberrations of Numerical Embodiments 1, 5, 6 and 7 of the present invention. It is a figure. In the figure, (A) shows the wide-angle end and (B) shows the telephoto end. SC is a sine condition, ΔM is a meridional image plane, ΔS is a sagittal image plane, d is d line, and g is g line.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山田 康幸 神奈川県川崎市高津区下野毛770番地 キ ヤノン株式会社玉川事業所内 (56)参考文献 特開 昭57−201213（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasuyuki Yamada 770 Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa Canon Inc. Tamagawa Plant (56) Reference JP-A-57-201213 (JP, A)
Claims (1)
と負の屈折力の第２レンズ群の２つのレンズ群を有し、
両レンズ群の間隔を変えて変倍を行うズームレンズにお
いて、前記第２レンズ群を物体側より順に物体側へ凸面
を向けた負の屈折力のメニスカス状の第２−１レンズと
像面側に凸面を向けた負の屈折力のメニスカス状の第２
−２レンズより構成し、該第２−１レンズの像面側のレ
ンズ面の曲率半径をＲII２，該第２−２レンズの物体側
のレンズ面の曲率半径をＲII３、該第２−１レンズと第
２−２レンズの焦点距離を各々ｆII１，ｆII２、該第１
レンズ群と第２レンズ群の焦点距離を各々Ｆ１，Ｆ２、
該第１レンズ群と第２レンズ群の全変倍における移動量
を各々Ｓ１，Ｓ２、広角端のズーム位置での全系の焦点
距離をｆｗとするとき、 −２．０＜ｆII２／ｆｗ＜−０．８ −１．０＜ＲII３／ｆｗ＜−０．１５ ０．８＜ＲII２／ｆｗ＜５．０ −１．５＜Ｆ１／Ｆ２＜−０．６ ０．４＜Ｓ１／Ｓ２＜０．９ ２．０＜ｆII１／ｆII２＜３．８ なる条件を満足することを特徴とする小型のズームレン
ズ。1. A first lens group having a positive refracting power and a second lens group having a negative refracting power are arranged in this order from the object side.
In a zoom lens that performs zooming by changing the distance between both lens groups, a meniscus-shaped second lens 2-1 having a negative refractive power with the second lens group having a convex surface directed from the object side to the object side, and the image plane side. Second negative meniscus-shaped lens with negative refractive power
-2 lens, the radius of curvature of the image surface side lens surface of the 2-1 lens is RII 2 , the curvature radius of the object side lens surface of the 2-2 lens is RII 3 , and the second The focal lengths of the first lens and the second-2 lens are fII 1 and fII 2 , respectively.
The focal lengths of the lens group and the second lens group are F 1 , F 2 , and
When the moving amounts of the first lens unit and the second lens unit in total magnification change are S 1 and S 2 , respectively, and the focal length of the entire system at the zoom position at the wide-angle end is fw, −2.0 <fII 2 /fw<-0.8 -1.0 <RII 3 /fw<-0.15 0.8 < RII 2 /fw<5.0 -1.5 <F 1 / F 2 <-0.6 0. A compact zoom lens which satisfies the condition of 4 <S 1 / S 2 <0.9 2.0 <fII 1 / fII 2 <3.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59209193A JPH0625825B2 (en) | 1984-10-05 | 1984-10-05 | Small zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59209193A JPH0625825B2 (en) | 1984-10-05 | 1984-10-05 | Small zoom lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6187120A JPS6187120A (en) | 1986-05-02 |
| JPH0625825B2 true JPH0625825B2 (en) | 1994-04-06 |
Family
ID=16568891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59209193A Expired - Lifetime JPH0625825B2 (en) | 1984-10-05 | 1984-10-05 | Small zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0625825B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966794A (en) * | 2017-12-29 | 2018-04-27 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE35775E (en) * | 1987-07-23 | 1998-04-21 | Betensky; Ellis I. | Zoom lens with short back focal length |
| US5327290A (en) * | 1989-10-13 | 1994-07-05 | Minolta Camera Kabushiki Kaisha | Compact size zoom lens system |
| US5283693A (en) * | 1990-06-13 | 1994-02-01 | Minolta Camera Kabushiki Kaisha | Compact zoom lens system |
| JPH0643613U (en) * | 1992-11-17 | 1994-06-10 | インダストリアル テクノロジー リサーチ インスチチュート | Zoom lens device for small camera |
| JP3414552B2 (en) * | 1995-06-06 | 2003-06-09 | オリンパス光学工業株式会社 | Zoom lens |
| JP3435364B2 (en) * | 1998-12-24 | 2003-08-11 | ペンタックス株式会社 | Zoom lens system |
| JP3526560B2 (en) | 2001-06-14 | 2004-05-17 | オリンパス株式会社 | Zoom optical system and camera using the same |
| JP6226376B2 (en) * | 2013-12-25 | 2017-11-08 | カンタツ株式会社 | Imaging lens |
| JP6085060B1 (en) * | 2016-11-04 | 2017-02-22 | エーエーシーアコースティックテクノロジーズ（シンセン）カンパニーリミテッドＡＡＣ Ａｃｏｕｓｔｉｃ Ｔｅｃｈｎｏｌｏｇｉｅｓ（Ｓｈｅｎｚｈｅｎ）Ｃｏ．，Ｌｔｄ | Imaging lens |
| CN109061853B (en) * | 2018-08-14 | 2020-12-11 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
| CN108983392B (en) * | 2018-08-14 | 2020-07-17 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57201213A (en) * | 1981-06-04 | 1982-12-09 | Canon Inc | Microminiature zoom lens |
| JPS58184915A (en) * | 1982-04-23 | 1983-10-28 | Konishiroku Photo Ind Co Ltd | Small-sized zoom lens |
-
1984
- 1984-10-05 JP JP59209193A patent/JPH0625825B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107966794A (en) * | 2017-12-29 | 2018-04-27 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6187120A (en) | 1986-05-02 |
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