JPS60146213A - Aspherical optical system - Google Patents
Aspherical optical systemInfo
- Publication number
- JPS60146213A JPS60146213A JP241984A JP241984A JPS60146213A JP S60146213 A JPS60146213 A JP S60146213A JP 241984 A JP241984 A JP 241984A JP 241984 A JP241984 A JP 241984A JP S60146213 A JPS60146213 A JP S60146213A
- Authority
- JP
- Japan
- Prior art keywords
- aspherical
- optical system
- lens
- optical axis
- height
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/04—Simple or compound lenses with non-spherical faces with continuous faces that are rotationally symmetrical but deviate from a true sphere, e.g. so called "aspheric" lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、１枚又は複数枚のレンズで構成され少なくと
も１つの面が非球面である非球面光学系に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aspherical optical system that is composed of one or more lenses and has at least one aspherical surface.
従来の非球面は一般に次の式で示されるものが多い。Conventional aspheric surfaces are generally expressed by the following formula.
Ｘ＝Ｒ（１−＋ １−（Ｈ／Ｒ）２） ”：］＋ ａ）
ｌ ２ ＋ ｂＨ’ ＋ｃＨ６、＋ ｃｌＨ８＋ ｅＨ
”たたし、ａ、ｂ、ｃ、ｄ、ｅは非球面係数、Ｈは光軸
からの高さ、Ｒは近軸曲率半径、Ｘは面頂点を）Ｑ ノ
ー（１４とした面の光１１１１１＋方向の変位である。X=R(1-+ 1-(H/R)2) ”:]+ a)
l 2 + bH' +cH6, + clH8+ eH
``A, b, c, d, e are aspherical coefficients, H is the height from the optical axis, R is the paraxial radius of curvature, X is the surface apex) Q No (light of the surface set to 14) This is the displacement in the 11111+ direction.
従って、第１図（ａ） 、 （ｂ）に示すように、レン
ズｌの非球面Ａか近軸曲率半径Ｂと同一の部分は高さＨ
が無限に小さいときである。また、現在の非球面加工は
研削方式を採用していることが多く、非球面の面を微視
的に観察すると球面の面に対し相当に凹凸が存在する。Therefore, as shown in FIGS. 1(a) and 1(b), the portion of the lens l that is the same as the aspheric surface A or the paraxial radius of curvature B has a height H.
is infinitely small. Furthermore, current aspheric surface processing often employs a grinding method, and when an aspheric surface is microscopically observed, there are considerable irregularities relative to a spherical surface.
しかし、この非球面を撮影レンズの一部に使用したとき
、軸」−開放光束の最良性能の位１ｔ６でピントを合わ
せれば、前記凹凸は像性能に殆ど悪影響を与えることは
ない。However, when this aspherical surface is used as a part of a photographic lens, if focusing is performed at 1t6, which is the best performance of the axis--opening luminous flux, the unevenness will have almost no adverse effect on image performance.
一方、般近のＴＴＬ３５ミリ−眼レフレックスカメラに
おいては、スプリントイメージでピント合わせを行うの
が主流となっている。スプリットイメージとは全光束は
使用せずに成る幅を持った輪帯光束を用いており、その
幅はＦ４或いはＦ５．６〜Ｆ８或いはＦｉｌまでの範囲
が多い。On the other hand, in conventional TTL 35 mm eye reflex cameras, focusing is performed using a sprint image. A split image does not use the entire luminous flux, but instead uses an annular luminous flux with a width, and the width often ranges from F4 or F5.6 to F8 or Fil.
従って、第２図に示すように輪帯光束Ｃに相当するレン
ズ１の非球面Ａの部分に凹凸が多く存在する場合は、ス
プリット位置最良像面りは中心最良ｆ象＋′ｉ′Ｉｉ
Ｅに対し異なった位置となり、Δｄのｙ；が生すること
になる。光学設計上では、中心最良像面Ｅの位置は周辺
性能もほぼ最良となるため、スプリット位置最良像面り
で撮影すると△ｄだけアラ）・フォーカスした像になっ
てしまう。そのため従来では、輪帯光束Ｃに相当する非
球面Ａの部分は極めて高精度を必要とし、また非球ｍル
ンズをレンズ系に組み込んだ後でなければ、非球面Ａの
面精度の正確な判定ができないという欠点があった。Therefore, if there are many irregularities on the aspherical surface A of the lens 1 corresponding to the annular beam C as shown in FIG.
The position will be different from E, and y; of Δd will occur. In terms of optical design, the peripheral performance is almost the best at the position of the central best image plane E, so if the image is photographed at the split position best image plane, the image will be out of focus by Δd. Therefore, in the past, the part of the aspherical surface A corresponding to the annular beam C required extremely high precision, and the accuracy of the surface accuracy of the aspherical surface A could only be determined after the aspherical m-lens was incorporated into the lens system. The drawback was that it was not possible.
本発明の目的は、従来のピント面がアウトフォーカスに
なり易いという前述の欠点を除去すると同時に、非球面
本来の性質である開放フレアの除去、歪曲除去の効果を
伺ら妨げることなく実現できる非球面光学系を提供する
ことにある。The purpose of the present invention is to eliminate the above-mentioned disadvantage that the conventional focusing surface tends to be out of focus, and at the same time, it is an object of the present invention to achieve a method that can be realized without hindering the effects of eliminating open flare and distortion, which are the inherent properties of an aspheric surface. The object of the present invention is to provide a spherical optical system.
そしてこの目的を達成するための本発明の実施例１は、
１枚又は複数枚のレンズから成る光学系において、少な
くとも１つの面Ｒ３は、光軸からの高さＨまでは球面で
あり、Ｈから周辺部にかけては非球面を形成し、光ｌｌ
１ｈ中心からレンズ外径までを連続的な形状とし、前記
非球面を含むレンズの外径をφとしたとき、
φ／３０＜Ｈ＜φ／４ ・・・（１）
なる条件を満足するようにしている。Embodiment 1 of the present invention for achieving this purpose is as follows:
In an optical system consisting of one or more lenses, at least one surface R3 is a spherical surface up to a height H from the optical axis, and forms an aspheric surface from H to the periphery.
When the shape is continuous from the center of 1h to the outer diameter of the lens, and the outer diameter of the lens including the aspherical surface is φ, the following condition is satisfied: φ/30<H<φ/4 (1) I have to.
また、前記球面の曲率半径をｒ、総合焦点距離をｆ （
ｍｍ）としたとき、
ｌ ｒ ｌ＜３０ｆ −（２）
を満足するようにすることが好ましい。Also, the radius of curvature of the spherical surface is r, and the total focal length is f (
mm), it is preferable to satisfy lrl<30f-(2).
このような構成とすれば、第３図に示すように非球面Ａ
上の光軸中心からスプリッＩ・イメージ輪りｉ）光束付
近までは球面であるため、例えは従来の球面研摩技術の
応用が可能となり、少なくともこの球面部分には微視的
に見ても凹凸の形状は存在しなくなる。従って、従来の
欠点であるスプリントイメージ最良像面のアウトフォー
カス現象は殆ど存在しなくなる。また、非球面Ａの中心
伺近が球面のため非球面レンズ単体の検査時に、例えば
球１ｒ１１原器を用いて中心伺近の球面の精度を測定す
れば、適状の〕ｊ（面レンズと同様に（１／２）入のニ
ュートンオータで精度管理をすることが可能となる。With such a configuration, the aspherical surface A as shown in FIG.
Since the area from the center of the optical axis above to the vicinity of the split I/image ring i) light beam is a spherical surface, it is possible to apply conventional spherical surface polishing technology, and at least this spherical surface has no unevenness even when viewed microscopically. The shape no longer exists. Therefore, the out-of-focus phenomenon of the best image plane of the sprint image, which is a conventional drawback, almost no longer exists. In addition, since the aspherical surface A has a spherical surface near its center, when inspecting a single aspherical lens, if the accuracy of the spherical surface near its center is measured using, for example, a sphere 1r11 prototype, it will be possible to determine the appropriate Similarly, accuracy control can be performed using a (1/2) input Newtonian.
また、実施例２は１枚又は複数枚のレン不から成る光学
系において、少なくとも１つの面Ｒ３は、光Ｎ：Ｉ＋か
らの高さＨまでは球面であり、Ｈから周辺部にかけては
非球面を形成し、光軸中心からレンズ外径までを連続的
な形状とし、口径比１：４の軸上光線が前記非球面に入
射するときの光軸からの高さをｈとしたとき
ｈ／３≦Ｈ≦ｈ ・・・（３）
なる条件を２１！Ｊｉ足している。Further, in the second embodiment, in an optical system consisting of one or more lenses, at least one surface R3 is a spherical surface up to a height H from the light N:I+, and an aspheric surface from H to the peripheral part. The shape is continuous from the center of the optical axis to the outer diameter of the lens, and when h is the height from the optical axis when an axial ray with an aperture ratio of 1:4 is incident on the aspherical surface, h/ 3≦H≦h...(3) 21 conditions! I'm adding Ji.
次に、一般に非球面の大きな特長は、大口径レンズの開
放でのフレアの除去、或いは大画角レンズの樽型歪曲の
除去であると云え、これらは共にレンズの周辺ｉｌイ１
（分において球面からの逸脱量を大きくすることにより
効果が現われるようになっている。Next, in general, the major feature of an aspherical surface is the elimination of flare when wide aperture lenses are opened, or the barrel distortion of large angle of view lenses, both of which are effective at reducing the peripheral illumination of the lens.
(The effect appears by increasing the amount of deviation from the spherical surface in minutes.
このために条件式（１）或いは（３）が必要であり、主
に大画角レンズで開口絞りよりも物体側に非球面を用い
る場合に条件式（１）を適用し、主に大口径レンズに非
球面を用いる場合に条件式（２）を更に適用すればよい
。For this reason, conditional expression (1) or (3) is necessary, and conditional expression (1) is mainly applied when an aspherical surface is used on the object side of the aperture stop with a large angle of view lens. Conditional expression (2) may be further applied when an aspherical surface is used for the lens.
大口径レンズでは、性能を良好に保つために各面の屈折
力をできるだけ均等に振り分ける必要かある。従って、
非球面の屈折力も成る程度必要である。また、０．４ｆ
＜ｌ ｒ ｌ＜１Ｏｆであれば、更に性能が良好と保持
できる。In large-diameter lenses, it is necessary to distribute the refractive power of each surface as evenly as possible in order to maintain good performance. Therefore,
It is also necessary that the refractive power of the aspherical surface is sufficient. Also, 0.4f
If <l r l <1Of, the performance can be maintained as even better.
条件式（１） 、 （３）の上限値を超えると、周辺部
の非球面効果が弱くなり、下限値を超えると中心付近の
球面部分が小さくなり過ぎ、或いは球面部がスプリット
イメージ輪帯光束以下となるためにアウトフォーカスの
現象が生じ易くなる。If the upper limit of conditional expressions (1) and (3) is exceeded, the aspherical effect in the peripheral area becomes weak, and if the lower limit is exceeded, the spherical part near the center becomes too small, or the spherical part becomes a split image annular beam. The out-of-focus phenomenon tends to occur because of the following.
本発明を撮影光学系レンズに応用した実施例１、実施例
２の構成を第４図及び第５図に示す。実施例１は逆望遠
広角レンズタイプであり、焦点層ｊ７．ＩＩ’、’１４
、２９ ｍｍ、ＦＮｏ、Ｌ ： ２８、画角１１３．
４°、実施例２は変形ガウスタイプであって、焦点層Ｍ
５１ 、６ ｍｍ、 ＦＮｏ、１１．２、画角２７．７
°の仕様であり、それぞれ第３面Ｒ３か非球面となって
いる。The configurations of Embodiments 1 and 2 in which the present invention is applied to a photographic optical system lens are shown in FIGS. 4 and 5. Example 1 is a reverse telephoto wide-angle lens type, and the focal layer j7. II', '14
, 29 mm, FNo., L: 28, angle of view 113.
4°, Example 2 is a modified Gaussian type, and the focal layer M
51, 6 mm, FNo. 11.2, angle of view 27.7
The third surface R3 is an aspherical surface.
また、実施例１、実施例２のレンズ構成間の数値例をそ
れぞれ第１表、第２表に、非球面の数値例を第３表、第
４表に記載する。これらの数値例中、Ｒｉは物体側から
数えた第１番目のレンズ而の曲率半径、Ｄｌは第１番目
のレンズの軸」二厚又は空気間隔、旧とνｌはそれぞれ
第１番目のレンズのｄ線に対する屈折率とアツベ数、Ｙ
は光軸からの高さ、Ｘは面頂態位ガからの変位量（光軸
方向）、ΔＸは近軸曲率半径からの逸脱量（光軸方向）
である。Numerical examples for the lens configurations of Example 1 and Example 2 are listed in Tables 1 and 2, respectively, and numerical examples for the aspherical surface are listed in Tables 3 and 4, respectively. In these numerical examples, Ri is the radius of curvature of the first lens counted from the object side, Dl is the axis of the first lens, thickness or air distance, and νl are the radius of curvature of the first lens, respectively. Refractive index and Atsube number for d-line, Y
is the height from the optical axis, X is the displacement from the surface apex position (in the optical axis direction), and ΔX is the deviation from the paraxial radius of curvature (in the optical axis direction)
It is.
第１表
実施例Ｉ Ｆ＝１４．２９ ＦＮｏ＝１：２．８ ２ω
＝１１３．４゜Ｒ１＝ ４２．８８ １１１＝ ３．１
０ Ｎ ｌ＝１．６９８８０ νｌ＝ ５５．５Ｒ２＝
２８．ｌｆ（Ｄ２＝１１．５５Ｒ３一本５８．７１
０３＝ ５．８３ 、Ｎ２＝１．８０３１１ ν２＝
１３０．７Ｒ４＝ ５２．２５ ０４二〇、１５
Ｒ５＝ ３０．９５ ０５＝ １．７０ Ｎ５＝１．８
９８８０ １） ３＝ ５５．５Ｒ６＝ ｌ［ｉ、４４
Ｄ６＝ ５．７５Ｒ７＝ ３２．９７ ０７＝ １．
３０ Ｎ４＝１．７７２５０ ν４＝ ４ｆ１．６Ｒ８
＝ ｌＧ、４８ ０８＝ ５．９５Ｒ９＝ ３５７．２
４ ０９＝ １．５０ ’ Ｎ ５＝１．ｅ９６８０
ν５＝ ５５．５Ｒ１Ｏ＝ １２．４４ ＤｌＯ＝１０
．４０ Ｎｆｉ＝１．ｅ０３４２ νＧ＝ ３８．０Ｒ
１１＝−５５，９９０１１＝ ２．５３Ｒ１２＝ ０．
０ ＤＩ２＝ １．８０ Ｎ？＝１．５１８３３ シフ
＝８４．ｌＲ１３＝ ０．ＯＤ１３＝ ０．７０
Ｒ１４＝ ４９．４４ ０１４＝ ５．８ＯＮ８＝１．
５１７４２ ＋） ８＝ ５２．３Ｒ１５＝−１２，２
２Ｄ１５＝ １．５０ Ｎ９＝１．６９６８０ ν９＝
５５．５Ｒ１Ｂ＝−１４，５８０１８＝ １．０８Ｒ
１７＝ −１３，８６０１７＝ ０．９０ Ｎ１０＝１
．７７２５０ ｒノ ｌｏ＝ ４９．１３Ｒ１８＝−２
５，８８０１８＝ １．７０ＲＩ９＝１３Ｂ、４０ Ｄ
］９＝ ９．６５ Ｎ１１＝１．８８８９３ ν１１＝
３１．ｌＲ２０＝−２１，１９０２０＝ １．９０
Ｎ１２＝１．５９５５１ ν１２＝ ３！ａ、２Ｒ２１
＝ ５４．２２ ０２１＝ ０．８９Ｒ２２＝−１６０
，０１０２２＝ ０．８０ Ｎ１５＝１，９２２８ｆ（
ν１３＝ ２１．３Ｒ２３＝ ２８．５８ ０２３＝
５．５３ Ｎｌ４＝１．４８７４９ シ１４＝７０．ｌ
Ｒ２４＝−１７．８２ ０２４＝ ０．１０Ｒ２５＝２
７７．７１ ０２５＝ ２．１（３Ｎ１５＝１．８０４
００ ν１５＝ ４６ＪＲ２ｆ（＝ −４３，６０
第２表
実施例２ Ｆ＝５１．８ ＦＮｏ＝ｌ：１．２ ２（、
）＝２７．？。Table 1 Example I F=14.29 FNo=1:2.8 2ω
=113.4°R1= 42.88 111= 3.1
0 N l=1.69880 νl= 55.5R2=
28. lf (D2=11.55R3 one 58.71
03=5.83, N2=1.80311 ν2=
130.7R4= 52.25 0420, 15 R5= 30.95 05= 1.70 N5=1.8
9880 1) 3= 55.5R6= l[i, 44
D6=5.75R7=32.97 07=1.
30 N4=1.77250 ν4= 4f1.6R8
= lG, 48 08 = 5.95R9 = 357.2
4 09=1.50' N 5=1. e9680
ν5= 55.5R1O= 12.44 DlO=10
．． 40 Nfi=1. e0342 νG= 38.0R
11=-55,99011=2.53R12=0.
0 DI2= 1.80 N? =1.51833 Schiff=84. lR13=0. OD13=0.70 R14=49.44 014=5.8ON8=1.
51742 +) 8= 52.3R15=-12,2
2D15= 1.50 N9=1.69680 ν9=
55.5R1B=-14,58018=1.08R
17=-13,86017=0.90 N10=1
．． 77250 r no lo = 49.13R18 = -2
5,88018=1.70RI9=13B,40D
]9= 9.65 N11=1.88893 ν11=
31. lR20=-21,19020=1.90
N12=1.59551 ν12=3! a, 2R21
= 54.22 021= 0.89R22=-160
,01022=0.80 N15=1,9228f(
ν13= 21.3R23= 28.58 023=
5.53 Nl4=1.48749 C14=70. l
R24=-17.82 024=0.10R25=2
77.71 025 = 2.1 (3N15 = 1.804
00 ν15= 46JR2f(=-43,60 Table 2 Example 2 F=51.8 FNo=l:1.2 2(,
)=27. ? .
Ｒ１士 ８８．１７ ＤＩ＝ ４．４８ Ｎ １＝１．
８０４００ ν ｌ＝ ４ｆｉ、ｅＲ２＝２ｆｔ５．２
３ ０２＝ ０．１５Ｒ３＝＊３１３．Ｉ３４ ０３１
１．８３ Ｎ２＝１．８１５５４ ν ２＝ ４４．４
Ｒ４＝ １３４．８５ ０４＝ ２．０６ Ｎ５＝１．
６３８３［１ν ３＝ ３５．４Ｒ５＝ ２１．０７
０５＝ ８．３！３Ｒｅ＝ ｏ、ｏ ｏｅ＝ ７．’４
０
Ｒ７＝−１９．１０ １３７＝ １．２０ Ｎ４＝１．
８０５１８ ν ４＝ ２５．４Ｒ８＝２１３．２１
０８＝ ９．１８ Ｎ５＝１．８１８００ ｖ ５＝４
８ＪＲ９＝−３２，３４０９＝ ０．１５
Ｒ１０＝−１７ｆ（，９４Ｄ１０＝ ４．００ ＮＯ−
２，８８３００ν ８＝ ４０．８Ｒ１１＝−４６，０
００１１＝ ０．１０Ｒ’１２＝５９２．１７ Ｄ１２
＝ ３．３５ Ｎ？＝１．７？２５０ ν ７＝ ４９
．１（Ｒ１３＝−８１，２９０１３＝ ０．３０ＲＩ４
＝５０３．９１ ０１４＝ １．１（ＯＮａ＝＋、ｅ５
＋ｅｏ ν ８＝ ５８．ｅＲ１５＝−５０３，９１
ｊＣ非球面
第３表 実施例Ｉ
Ｙ Ｘ ΔＸ
０ ０ ０
０．５ ０．００２＋３ ０
１．０ ０．００８５２ ０
１．５ ０．０１９１８ ０
２．０ ０．０３４０７ ０
２．５ ０．０５３２５ ０
３．０ ０．０７Ｂ７０ ０
３．５ ０．１０４５９ ０．０００１８４．０ ０．
１３７１８ ０．０００７７４．５ ０．１７４７１３
０．００２０７５．０ ０．２１７５２ ０．００４
２５５．５ ０．２８５８７ ０．００７５１８．０
０．３１９４１ ０．０１２０５７．０ ０．４４１９
１ ０．０２３１Ｅｉ８．０ ０．５８７１７ ０．０
３’９Ｂ３９．０ ０．７５７５１ ０．０ｆｉ３Ｇ１
３１０．０ ０．９５５１２ ０．０９７３１＋２．０
１．４４２２４ ０．２０２９４＋４．０ ２．０？
１［（７０，３７８２２１ｅ、ｏ ２．８７２５１ ０
．６５０５１１８．０ ３．８８３８９ １．０５１（
８３２０，０５，１８４６８１，Ｅｉ５３５０２３．０
’？、８２７１４ ３．１３４９９第４表 実施例２
Ｙ Ｘ ΔＸ
０ ０ ０
０．５ ’Ｃ１，００３４１０
１、Ｑ Ｏ，０１３６５０
１，５０，０３０７２０
２，００，０５４Ｂ２ ０
２．５ ０．０８５３９ ０
３．０ ０．１２３０２ ０
３．５ ０．１８７５５ ０
４．０ ０．２１８９９ ０
４．５ ０．２７７３８ ０
５．０ ０．３４２７４−０．００００１５．５ ０．
４１５１０−０．００００４６．０ θ、４９４５０
−０．０００１０８．５ ０．５８０９８−０．０００
１７？、０ ０．ｅ７４５９−０．０００２８？、５
０．７７５３ｆ（−０，０００４４８，００，８８３３
ｆ（−０，０００８５９，０１，１２１２７−０，００
１２５＋０．０ １．３８８８Ｂ−０，００２１５＋２
．０ ２．０＋５７８−０．００４９７１４．０ ２．
７７０４８−０．００９６１１８．０ ３．８Ｂ０９４
−０．０１７０４１Ｂ、０ ４．８９８３９−０．０２
７７３２０．３ ５．９０４７２ −０．０３５１６第
６図及び第７図は実施例１における球面酸・差、非点収
差、歪曲収差及び横収差の曲線図、第８図は実施例２に
おける球面収差、非点収差、歪曲収差、倍率色収差図曲
線図であり、図面中のｍはメリディオナル焦線、Ｓはサ
ジタル焦線を示している。R1 88.17 DI= 4.48 N 1=1.
80400 ν l=4fi, eR2=2ft5.2
3 02= 0.15R3=*313. I34 031
1.83 N2=1.81554 ν 2= 44.4
R4=134.85 04=2.06 N5=1.
6383[1ν 3= 35.4R5= 21.07
05= 8.3!3Re= o, o oe= 7. '4
0 R7=-19.10 137=1.20 N4=1.
80518 ν 4=25.4R8=213.21
08=9.18 N5=1.81800 v 5=4
8JR9=-32,3409= 0.15 R10=-17f(,94D10= 4.00 NO-
2,88300ν 8=40.8R11=-46,0
0011= 0.10R'12=592.17 D12
= 3.35 N? =1.7?250 ν 7= 49
．． 1 (R13=-81,29013=0.30RI4
=503.91 014=1.1(ONa=+, e5
+eo ν 8= 58. eR15=-503,91 jC Aspheric Table 3 Example I Y .5 0.05325 0 3.0 0.07B70 0 3.5 0.10459 0.000184.0 0.
13718 0.000774.5 0.174713
0.002075.0 0.21752 0.004
255.5 0.28587 0.007518.0
0.31941 0.012057.0 0.4419
1 0.0231Ei8.0 0.58717 0.0
3'9B39.0 0.75751 0.0fi3G1
310.0 0.95512 0.09731+2.0
1.44224 0.20294+4.0 2.0?
1 [(70,378221e, o 2.87251 0
．． 6505118.0 3.88389 1.051(
8320,05,184681,Ei535023.0
'? , 82714 3.13499 Table 4 Example 2 Y 0 0.12302 0 3.5 0.18755 0 4.0 0.21899 0 4.5 0.27738 0 5.0 0.34274-0.000015.5 0.
41510-0.000046.0 θ, 49450
-0.000108.5 0.58098-0.000
17? , 0 0. e7459-0.00028? , 5
0.7753f(-0,000448,00,8833
f(-0,000859,01,12127-0,00
125+0.0 1.3888B-0,00215+2
．． 0 2.0+578-0.0049714.0 2.
77048-0.0096118.0 3.8B094
-0.017041B, 0 4.89839-0.02
77320.3 5.90472 -0.03516 Figures 6 and 7 are curve diagrams of spherical aberration, astigmatism, distortion, and lateral aberration in Example 1, and Figure 8 is the spherical aberration in Example 2. , astigmatism, distortion, and chromatic aberration of magnification. In the drawings, m indicates a meridional focal line, and S indicates a sagittal focal line.
以上説明したように本発明に係る非球面光学系は、非球
面を中心部の球面と周辺部の非球面とにより構成したの
で、製作か容易となり、しかも非球面の利点を十分に生
かすことが可能となる。As explained above, since the aspherical optical system according to the present invention is composed of a central spherical surface and a peripheral aspherical surface, it is easy to manufacture and can take full advantage of the advantages of the aspherical surface. It becomes possible.
第１図（ａ）、（ｂ）及び第３図（ａ） 、（ｂ）は近
軸曲率半径と非球面との関係の説明図、第２図は中心最
良像面とスリントイメージ最良像面との関係の説明図、
第４図は実施例１のレンズ断面図、第５図は実施例２の
レンズ断面図、第６図は実施例１の球面収差、非点収差
、歪曲収差図、第７図は横収差図、第８図は実施例２の
球面収差、非点収差、歪曲収差図、倍率色収差図である
。
図面中、Ｓは開口絞り、Ｒ１はレンズ面、Ｄｌは軸上厚
又は空気間隔である。
特許出願人 キャノン株式会社
第５図
第６図
３図Figure 1 (a), (b) and Figure 3 (a), (b) are explanatory diagrams of the relationship between the paraxial radius of curvature and the aspheric surface, and Figure 2 is the central best image surface and the best slint image. An explanatory diagram of the relationship with the surface,
Figure 4 is a cross-sectional view of the lens of Example 1, Figure 5 is a cross-sectional view of the lens of Example 2, Figure 6 is a diagram of spherical aberration, astigmatism, and distortion of Example 1, and Figure 7 is a diagram of lateral aberration. , and FIG. 8 are diagrams of spherical aberration, astigmatism, distortion, and lateral chromatic aberration of Example 2. In the drawings, S is an aperture stop, R1 is a lens surface, and Dl is an axial thickness or an air gap. Patent applicant: Canon Co., Ltd. Figure 5 Figure 6 Figure 3
Claims (1)
少なくとも１つの面は、光軸からの高さ、Ｈまでは球面
であり、Ｈから周辺部にかけては非球面を形成し、光ｉ
Ｎｌ＋中心からレンズ外径までを連続的な形状とし、前
記非球面を含むレンズの外径をφとしたとき、 φ／３０＜Ｈ＜φ／４ なる条件を満足することを特徴とする非球面光学系。 ２、 ４ｉｉｊ記球面の曲率半径をｒ、総合焦点距離を
ｆとしたとき、 ｌｒｌ＜３Ｏｆ を満足する特許請求の範囲第１項に記載の非球面光学系
。 ３．１枚又は複数枚のレンズから成る光学系において、
少なくとも１つの面は、光軸からの高さＨまでは球面で
あり、Ｈから周辺部にかけては非球面を形成し、光軸中
心からレンズ外径までを連続的な形状とし、１コ径比１
：４の軸上光線がｉ（５記載球面に入用するときの光軸
からの高さをｈとしたとき、 ｈ／３≦Ｈ≦ｈ なる条件を満足することを特徴とする非球面光学系。 ４、 前記光学系は逆望遠型広角レンズタイプであり、
物体側から数えて第１面と開１コ絞りとの間に前記非球
面を含むレンズを（Ｉｉｉｉえるようにした特許請求の
範囲第１項に記載の非球面光学系。 ５、 物体側から数えて第１番目の正の屈折力のレンズ
ＩＴの最も物体側の面に前記非工２１（面を含むレンズ
を備えるようにした特許請求の範囲第４項に記載の非球
面光学系。 ６、 前記光学系は変形力ウスタイプであり、物体側か
ら数えて第１面と開口絞りとの間に前記非球面を含むレ
ンズを備えるようにした特許請求の範囲第１項に記載の
非球面光学系。 ７． 物体側から数えて第３面に前記非球面を含むレン
ズを備えるようにした特許請求の範囲第６項に記載の非
球面光学系。[Claims] 1. In an optical system consisting of one or more lenses,
At least one surface is a spherical surface up to the height H from the optical axis, and forms an aspheric surface from H to the periphery, so that the light i
An aspherical surface having a continuous shape from the Nl+ center to the outer diameter of the lens, and satisfying the condition φ/30<H<φ/4, where φ is the outer diameter of the lens including the aspherical surface. Optical system. 2. The aspherical optical system according to claim 1, which satisfies lrl<3Of, where r is the radius of curvature of the spherical surface and f is the overall focal length. 3. In an optical system consisting of one or more lenses,
At least one surface is a spherical surface up to a height H from the optical axis, forms an aspheric surface from H to the peripheral part, has a continuous shape from the center of the optical axis to the outer diameter of the lens, and has a diameter ratio of 1. 1
:Aspherical optics characterized in that the axial ray of 4 satisfies the condition h/3≦H≦h, where h is the height from the optical axis when the axial ray of 4 enters the spherical surface described in 5. system. 4. The optical system is a reverse telephoto wide-angle lens type,
The aspherical optical system according to claim 1, wherein the lens including the aspherical surface is located between the first surface and the aperture diaphragm when counted from the object side. 5. From the object side 6. The aspherical optical system according to claim 4, wherein the aspherical optical system includes a lens including the aperture 21 (surface) on the surface closest to the object side of the first lens IT having a positive refractive power. , The aspherical optical system according to claim 1, wherein the optical system is a deformable force type and includes a lens including the aspherical surface between the first surface and the aperture stop when counted from the object side. System. 7. The aspherical optical system according to claim 6, further comprising a lens including the aspherical surface on a third surface counted from the object side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP241984A JPS60146213A (en) | 1984-01-10 | 1984-01-10 | Aspherical optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP241984A JPS60146213A (en) | 1984-01-10 | 1984-01-10 | Aspherical optical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60146213A true JPS60146213A (en) | 1985-08-01 |
Family
ID=11528726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP241984A Pending JPS60146213A (en) | 1984-01-10 | 1984-01-10 | Aspherical optical system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60146213A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2605114A1 (en) * | 1986-10-01 | 1988-04-15 | Reosc | STIGMATIC LENS WITH SEVERAL WAVELENGTH LENGTHS |
| JP2001159732A (en) * | 1999-12-02 | 2001-06-12 | Nikon Corp | Super wide angle lens and photographic device having the lens |
-
1984
- 1984-01-10 JP JP241984A patent/JPS60146213A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2605114A1 (en) * | 1986-10-01 | 1988-04-15 | Reosc | STIGMATIC LENS WITH SEVERAL WAVELENGTH LENGTHS |
| JP2001159732A (en) * | 1999-12-02 | 2001-06-12 | Nikon Corp | Super wide angle lens and photographic device having the lens |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3074026B2 (en) | Super wide-angle zoom lens | |
| JPS6119016B2 (en) | ||
| JPS6048013B2 (en) | Finder optical system | |
| JPH0642017B2 (en) | Compact zoom lens | |
| JPH05224119A (en) | Large-diameter intermediate telephoto lens | |
| JP3369598B2 (en) | Zoom lens | |
| JPH01214812A (en) | Macro lens | |
| JPH0414763B2 (en) | ||
| JP3085823B2 (en) | Aspherical zoom lens and video camera using it | |
| US4176915A (en) | Wide angle lens | |
| JPS6229768B2 (en) | ||
| JPH0727976A (en) | Small-sized two-group zoom lens system | |
| JP3540349B2 (en) | Wide angle lens with long back focus | |
| JP3234618B2 (en) | Large aperture medium telephoto lens | |
| JP4817551B2 (en) | Zoom lens | |
| JPH06337348A (en) | Gauss type lens | |
| JPH05333266A (en) | Small-sized two-group zoom lens | |
| JPS6142245B2 (en) | ||
| JPH07318798A (en) | Photographic lens | |
| JP2811828B2 (en) | Zoom lens having simple configuration and camera having the same | |
| JPH02248910A (en) | Fish-eye lens | |
| JPH0569209B2 (en) | ||
| JP3744042B2 (en) | Zoom lens | |
| JP2007133138A (en) | Zoom lens | |
| JPS60146213A (en) | Aspherical optical system |