JPS59201014A - Zoom lens - Google Patents
Zoom lensInfo
- Publication number
- JPS59201014A JPS59201014A JP58075939A JP7593983A JPS59201014A JP S59201014 A JPS59201014 A JP S59201014A JP 58075939 A JP58075939 A JP 58075939A JP 7593983 A JP7593983 A JP 7593983A JP S59201014 A JPS59201014 A JP S59201014A
- Authority
- JP
- Japan
- Prior art keywords
- group
- lens
- refractive power
- negative
- object side
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 3
- 230000003287 optical effect Effects 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 2
- 230000014509 gene expression Effects 0.000 abstract 2
- 230000004075 alteration Effects 0.000 description 33
- 238000010586 diagram Methods 0.000 description 12
- 201000009310 astigmatism Diseases 0.000 description 3
- 206010010071 Coma Diseases 0.000 description 1
- 240000000220 Panda oleosa Species 0.000 description 1
- 235000016496 Panda oleosa Nutrition 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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
- G02B15/144—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 four groups only
- G02B15/1441—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 four groups only the first group being positive
- G02B15/144113—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 four groups only the first group being positive arranged +-++
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
Description
【発明の詳細な説明】
の準広角域から、望遠域の範囲を満足するズームレンズ
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a zoom lens that satisfies a range from a semi-wide angle range to a telephoto range.
従来より準広角レンズから望遠レンズの範囲を満足する
通常撮影において利用価値の高いズームレンズが望まれ
ているが、コンノぐクトに設計しようとするには、特に
フォーカシング部としての第１群及びパリエータ一部と
しての第２群の焦点距離の絶対値を短かくする必要があ
ｐｌこれに．Ｃシ諸収差の増大が起シ、補正が非常に困
難であった。A zoom lens that satisfies the range from a semi-wide-angle lens to a telephoto lens and is highly useful for normal photography has been desired, but in order to design it in a concise manner, it is especially important to have the first group and pariator as the focusing section. It is necessary to shorten the absolute value of the focal length of the second group as part of this. This resulted in an increase in various aberrations and was extremely difficult to correct.
本発明は、可変焦点距離範囲が３５〜７ ３ ５ ｍ．
ｍ。The present invention has a variable focal length range of 35 to 735 m.
m.
で、広角側でＦ３．！；クラスの大口径で、しかも非常
にコンノヤクトな構成を可能にすることを目的としたも
のである。So, on the wide-angle side, F3. ! ; Its purpose was to enable a class of large-diameter, yet very connoisseur configurations.
本発明の特徴は、物体側よシ順に、フォーカシング部と
して正屈折力の第１群、パリエータ部として負屈折力の
第２群、コンペンセータ一部として正屈折力の第３群マ
スタ一部として正屈折力の第９群を有し、第１１第３、
第を群の関係移動によシ変倍を行い、第を群の単独移動
にょシフォーカシングを行う光学系において、前記第２
群が物体側から順に、像側により強い曲率を有する負レ
ンズＧ４、正負エレメントＧ５、Ｇ６を接合してなる接
合レンズ、
物体側により強い曲率を有する負レンズＧ７物体側によ
り強い曲率を有する正レンズＧ８で構成され、かつ、以
下の条件を満足することを特徴とするズームレンズ。The features of the present invention include, in order from the object side, the first group with positive refractive power as the focusing section, the second group with negative refractive power as the pariator section, the third group with positive refractive power as part of the compensator, and the third group with positive refractive power as part of the compensator. It has a ninth group of refractive power, an eleventh third group,
In the optical system, the second optical system performs magnification by moving the groups relative to each other, and the second optical system performs focusing by moving the groups independently.
In order from the object side, the groups are: a negative lens G4 having a stronger curvature on the image side, a cemented lens formed by cementing positive and negative elements G5 and G6, a negative lens G7 having a stronger curvature on the object side, a positive lens having a stronger curvature on the object side. A zoom lens comprising G8 and satisfying the following conditions.
（５） ７．７２＜ ＮＵ／
（６）／．Ａタ＜ ＮＩＩ弘＜／．り（７） ／
．ｇ＜ 〜■タ
ここで
ｆＩＩ ・・・第一群の焦点距離
ｆＷ・・・ズームレンズ全系の最短焦点距離Ｒ１ｉ・・
・第２群の第１番目のレンズ面の曲率半径
Ｎｌ＋・・・第２群の第１番目の硝材ｄ線の屈折力
次に前記特徴について詳述すると、第１群が正屈折力を
有する壱合、第２＃は負屈折力を持たせるのが必然であ
る。本発明の第２群の焦点距離の絶対値は、ズームレン
ズ系の最短焦点距離と比較して非常に短かく設足し、又
第２群の移動による作動誤差を無くする為ズーミング中
は固定し、更に第１群と第４Ｌ群とはズーミング中一体
的に移動させ、第３群のみを独立移動させる各レンズ群
の移動形式とした。この各レンズ群の移動形式は実際に
レンズを組立てる場合コンパクトであシなから、容易に
高精度に組立てられ、しかも部品加工や、組立工数など
のコストダウンにも効果を与えるだろう事は容易に推測
できる。(5) 7.72< NU/ (6)/. Ata < NII Hiroshi</. ri (7) /
．． g< ~■ta Here fII... Focal length of the first group fW... Shortest focal length of the entire zoom lens system R1i...
・Radius of curvature Nl+ of the first lens surface of the second group d-line refractive power of the first glass material of the second group Next, to explain the above characteristics in detail, the first group has positive refractive power. In some cases, it is necessary that the second lens #2 has negative refractive power. The absolute value of the focal length of the second group of the present invention is set to be very short compared to the shortest focal length of the zoom lens system, and is fixed during zooming to eliminate operational errors due to movement of the second group. Furthermore, the first lens group and the fourth L group are moved integrally during zooming, and only the third lens group is moved independently. The movement of each lens group is compact and easy when actually assembling the lens, so it can be easily assembled with high precision, and it is easy to see that it will be effective in reducing costs such as parts processing and assembly man-hours. It can be inferred that
条件（１）は、第２群の焦点距離の適正な範囲であって
、下′限を越えた場合は特に最望遠端での球面収差の補
正が著しく困難であり、上限を越えた場合は、目的とす
るコンパクトに構成する条件を逸脱するものである。Condition (1) is an appropriate range for the focal length of the second group; if the lower limit is exceeded, it is extremely difficult to correct spherical aberration, especially at the maximum telephoto end, and if the upper limit is exceeded, , which deviates from the desired compact configuration conditions.
条件（２１ ｉ 、＼第２群で最も強い発散性のレンズ
面についてであるが、上限を越えｆｃ場合は、広角側で
発生する負の歪曲収差が大きくなり補正が困難になる。Condition (21 i, \ Regarding the lens surface with the strongest divergence in the second group, if fc exceeds the upper limit, negative distortion occurring on the wide-angle side becomes large and correction becomes difficult.
又下限を越えた場合は、広角側で発生する像面湾曲収差
が大きくなり補正困難になる。If the lower limit is exceeded, the curvature of field aberration occurring on the wide-angle side becomes large and difficult to correct.
広角側で発生する歪曲収差及び像面湾曲収差を打ち消す
為、物体側へ強い凹面を向けた両凹レンズを設けたが、
条件（３）はこのレンズの適正範囲で、上限を越えると
広角側の歪曲収差は更に小さーくなるが、望遠側で、コ
マ収差が悪化し、フレアーが大きく発生してぐる。下限
を越えると、広角側で負の歪曲収差が著しく発生し、又
、像面湾曲収差もかな９オーバーになり適正範囲の限界
を越えた場合は他のレンズ面でこれらの収差を補正する
ことは不可能である。In order to cancel out distortion and field curvature aberration that occur on the wide-angle side, a biconcave lens with a strongly concave surface facing the object side was installed.
Condition (3) is the appropriate range for this lens; if the upper limit is exceeded, the distortion on the wide-angle side becomes even smaller, but on the telephoto side, coma aberration worsens and a large amount of flare occurs. If the lower limit is exceeded, negative distortion will occur significantly on the wide-angle side, and field curvature will also exceed Kana 9. If the limit of the appropriate range is exceeded, these aberrations must be corrected using other lens surfaces. is impossible.
球面収差に、第３群でおおむね補正されるが、ズーミン
グによる球面収差の変動は、第２群の鰍も像側の強い凸
面全物体側に向けた凸メニスカスレンズによって補正が
可能である。Spherical aberration is mostly corrected by the third group, but fluctuations in spherical aberration due to zooming can be corrected by a convex meniscus lens in the second group, which also has a strongly convex surface on the image side, all facing toward the object side.
条件（４）はこの為に必要であシ、下限を越えた場合は
望遠側の球面収差が著しくアンダーにな９、逆に上限を
越えた場合は著しくオーバーにな９、このＲＩ１ｇ面の
変化は望遠側の球面収差に大きな変化として影響する為
条１＋（４）の範曲外でに、他のレンズ面でこの球面収
差全補正することは不可ｉヒである。Condition (4) is necessary for this purpose; if the lower limit is exceeded, the spherical aberration on the telephoto side will be significantly undervalued9, and conversely, if the upper limit is exceeded, the spherical aberration will be significantly overvalued9.This change in the RI1g surface Since this affects the spherical aberration on the telephoto side as a large change, it is impossible to completely correct this spherical aberration with other lens surfaces outside the range of 1+(4).
条件（５）は広角側の像面Ｐｉ血収差を少なくする為に
必要であり、周辺画角の光束は、第、２群の物体側の最
初のレンズで光軸より最も離れた位置を通過するが、こ
のレンズのＭＡ？ｒ率が商い程、レンズ面の曲率半径ケ
大きくすることが出来て、光束の急激な発散を防止する
効果がある。Condition (5) is necessary to reduce image plane Pi blood aberration on the wide-angle side, and the light beam at the peripheral angle of view passes through the first lens on the object side of the second group, at the position farthest from the optical axis. However, what is the MA of this lens? The higher the r-ratio, the larger the radius of curvature of the lens surface, which has the effect of preventing rapid divergence of the luminous flux.
条件（６）ハ主に歪曲収差補正に効果のあるレン°ズに
ついての条件であるが、この屈折率が高いと４ツツバー
ル和が大きくな９非点隔走の補正が困難になる。又下限
を越えた場合は広角側で負の歪曲収差が者しく発生し、
他のレンズ面でこれを補正することは不可能である。Condition (6) is a condition for lenses that are mainly effective in correcting distortion aberrations; however, if this refractive index is high, it becomes difficult to correct 9-astigmatism, which has a large sum of 4 tubes. Also, if the lower limit is exceeded, negative distortion will clearly occur on the wide-angle side,
It is not possible to correct this with other lens surfaces.
条件（７）は望遠側の球面収差補正に重要なレンズにつ
いてであるが、この屈折率は球面収差の形状に大＠な影
響を与える。下限を越えた場合は、球面収差の補正不足
となる。Condition (7) concerns a lens that is important for correcting spherical aberration on the telephoto side, and its refractive index has a large influence on the shape of the spherical aberration. If the lower limit is exceeded, spherical aberration will be insufficiently corrected.
次に本発明の実施例を示す。Next, examples of the present invention will be shown.
ｆ＝３乙、２．ｇ −ｇ３ 〜１３２．０６ Ｆ
ＮＯ３，１，／ 弘、りｆ■＝−７７，２夕乙
〈
他
＼ −中
°＝ ≧実施例に
おける諸収差図から解るごとく、ズーミングによる裳倍
によっても優れｆｃ結イＳ：性能が維持され、撮影馳駆
変化に対し７ても充分な結像性能を有している優れたズ
ームレンズであることがｊ’ｌ’＃る。f=3, 2. g −g3 ~132.06 F
No. 3, 1, / Hiro, Ri f■ = -77, 2 Yuotsu〈 Others\ - Medium ° = ≧ As can be seen from the various aberration diagrams in the examples, excellent fc coupling is maintained even with magnification by zooming. This shows that it is an excellent zoom lens that has sufficient imaging performance even when the shooting speed changes.
同、実施例においてＧ１、Ｇ２及びＧ、。、、Ｇ１．は
共に接合レンズになっているが、コストダウンを計る目
的で各レンズ間に極少の空間を設けることにＬシ、非接
合にしても渋支えない。G1, G2 and G in the same example. ,,G1. Both lenses are cemented lenses, but in order to reduce costs, it is necessary to provide a very small space between each lens, so it is difficult to make them non- cemented.
第１図は本発明の実施例のレンズ構成図、第２図は実施
例の最短焦点距離Ｃｆ＝３１．．２ｇ）の無限遠物体に
対する諸収差図、第３図は近距離物体に対する諸収差図
、第９図は実施例の中間の焦点距離（ｆ＝ｇ３．ｌ、０
）の無限遠物体に対する諸収差図、第５図は近距離物体
に対する諸収差図、第４図は、最長焦点距離（ｆ＝７３
２．０１．）の無限遠物体に対する諸収差図、第７図は
近距離物体に対する諸収差図である。
Ｇ °・・ ”１５ 物体側よりの各単体レンズｒ
、・・・「２７ 谷単体レンズの曲率半径Ｉ ・・
・ ■ 物体側ｌよりの谷しンズ群■求面収差
軸主色収差
第３図
球面収差 軸上色収差
第４図
球面収差 軸上色収差
歪曲収差 非点収差
児６図
球面収差 軸上色収差
球面収差
歪曲収差
図
軸土色取左
非点収差FIG. 1 is a lens configuration diagram of an embodiment of the present invention, and FIG. 2 is a lens configuration diagram of an embodiment of the present invention with the shortest focal length Cf=31. ．． 2g) is a diagram of various aberrations for an object at infinity, Figure 3 is a diagram of various aberrations for a close object, and Figure 9 is a diagram of the intermediate focal length of the example (f = g3.l, 0
) is a diagram of various aberrations for an object at infinity, Figure 5 is a diagram of various aberrations for a close object, and Figure 4 is a diagram of the maximum focal length (f = 73
2.01. ) is a diagram of various aberrations for an object at infinity, and FIG. 7 is a diagram of various aberrations for an object at a close distance. G °... ”15 Each single lens r from the object side
,..."27 Radius of curvature I of valley single lens...
・ ■ Valley lens group from object side l ■ Surface aberration
Axial principal chromatic aberration Figure 3 Spherical aberration Axial chromatic aberration Figure 4 Spherical aberration Axial chromatic aberration Distortion Astigmatism Figure 6 Spherical aberration Axial chromatic aberration Spherical aberration Distortion diagram Axial color removal Left astigmatism
Claims (1)
１群、バリエータ部として負屈折力の第２群、コンペン
セータ一部として正屈折力の第３群、マスタ一部として
正屈折力の第を群を有し、第１、第３、嬉ダレンズ群の
関係移動によシ、変倍を行い、第１群の単独移動によｐ
フォーカシングを行う光学系において、前記第２群が物
体側から顔に、像側によシ強い曲率を有する負レンズＧ
４、正、負エレメントＧ、 １．Ｇ６を接合してなる接
合レンズ、物体側によシ強い曲率を有する負レンズＧ２
、物体側によシ強い曲率を有する正レンズＧ、で構成さ
れ、かつ、以下の条件を満足することを特徴とするズー
ムレンズ。 １１ （５１／、７２ ＜ ＮＩＰ／１６１ ／
、 ６ｋ＜ＮＴ１’ｌ＜／ 、り１７１、 １０ｇ
＜ Ｎｉｌ、ｔここで ｆｌ ・・・第２群の焦点距離 ｆＷ・・・ズームレンズ全系の最短焦点距離 Ｒ１１・・・第２群の第１番目のレンズ面の曲率半径・ Ｎ旧・・・第２群の第１番目の硝材ｄ線の屈折力[Claims] In order from the object side, a first group with positive refractive power as a focusing section, a second group with negative refractive power as a variator section, a third group with positive refractive power as a compensator section, and a master section as a master section. It has a lens group with positive refractive power, and changes magnification by moving the first, third, and optical lens groups in relation to each other, and by moving the first lens group independently.
In an optical system that performs focusing, the second group is directed from the object side to the face, and from the image side is a negative lens G having a strong curvature.
4. Positive and negative elements G, 1. A cemented lens made by cementing G6, a negative lens G2 with a strong curvature on the object side.
, a positive lens G having a strong curvature toward the object side, and satisfying the following conditions. 11 (51/, 72 < NIP/161 /
, 6k<NT1'l</ , ri171, 10g
< Nil, t where fl... Focal length of the second group fW... Shortest focal length of the entire zoom lens system R11... Radius of curvature of the first lens surface of the second group N old...・Refractive power of the first glass material of the second group d-line
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58075939A JPS59201014A (en) | 1983-04-28 | 1983-04-28 | Zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58075939A JPS59201014A (en) | 1983-04-28 | 1983-04-28 | Zoom lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59201014A true JPS59201014A (en) | 1984-11-14 |
| JPH0313566B2 JPH0313566B2 (en) | 1991-02-22 |
Family
ID=13590707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58075939A Granted JPS59201014A (en) | 1983-04-28 | 1983-04-28 | Zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59201014A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55124116A (en) * | 1979-03-17 | 1980-09-25 | Tamuron:Kk | Bright zoom lens exhibiting changing soft effect |
| JPS57161824A (en) * | 1981-03-31 | 1982-10-05 | Tokinaa Kogaku Kk | Zoom lens system |
| JPS57161804A (en) * | 1981-03-31 | 1982-10-05 | Tokinaa Kogaku Kk | Zoom lens system |
-
1983
- 1983-04-28 JP JP58075939A patent/JPS59201014A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55124116A (en) * | 1979-03-17 | 1980-09-25 | Tamuron:Kk | Bright zoom lens exhibiting changing soft effect |
| JPS57161824A (en) * | 1981-03-31 | 1982-10-05 | Tokinaa Kogaku Kk | Zoom lens system |
| JPS57161804A (en) * | 1981-03-31 | 1982-10-05 | Tokinaa Kogaku Kk | Zoom lens system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0313566B2 (en) | 1991-02-22 |
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