DE972707C - Anastigmatic lens - Google Patents

Anastigmatic lens

Info

Publication number
DE972707C
DE972707C DEZ2885A DEZ0002885A DE972707C DE 972707 C DE972707 C DE 972707C DE Z2885 A DEZ2885 A DE Z2885A DE Z0002885 A DEZ0002885 A DE Z0002885A DE 972707 C DE972707 C DE 972707C
Authority
DE
Germany
Prior art keywords
collecting
lens
limbs
links
lenses
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
Application number
DEZ2885A
Other languages
German (de)
Inventor
Friedrich Koch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Zeiss SMT GmbH
Original Assignee
Carl Zeiss SMT GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Carl Zeiss SMT GmbH filed Critical Carl Zeiss SMT GmbH
Priority to DEZ2885A priority Critical patent/DE972707C/en
Application granted granted Critical
Publication of DE972707C publication Critical patent/DE972707C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only

Description

Die Erfindung betrifft ein anastigmatisches Objektiv für Photographic und Projektion, bei dem zwei sammelnde Glieder zwei zerstreuende Glieder einschließen, wobei sämtliche acht Außenflächen dieser Glieder ihre hohlen Seiten dem von den inneren Gliedern begrenzten Blendenraum zuwenden und der Scheitelabstand der den Blendenraum begrenzenden Flächen größer ist als vier Fünftel des arithmetischen Mittels der Krümmungsradien dieser Flächen. Ein derartiges Objektiv ist durch die deutsche Patentschrift 636 167 bekanntgeworden.The invention relates to an anastigmatic lens for photographic and projection in which two collecting limbs include two dispersing limbs, with all eight outer surfaces these members turn their hollow sides to the aperture space delimited by the inner members and the vertex distance of the surfaces delimiting the diaphragm space is greater than four fifths of the arithmetic mean of the radii of curvature of these surfaces. Such a lens is through the German patent specification 636 167 became known.

Objektive mit einem derartigen Aufbau lassen sich erfindungsgemäß dadurch verbessern, daß jedes der beiden sammelnden Glieder aus mindestens zwei Linsen besteht, die eine voneinander verschiedene Farbenzerstreuung haben, derart, daß die Linse mit der geringeren Farbenzerstreuung immer die außenstehende ist und eine sammelnde Brechkraft hat und daß jede dieser außenstehenden, sammelnden Linsen einen größeren mittleren Brechungsindex aufweist als die zerstreuende Linse des ihr benachbarten sammelnden Außengliedes. Hierdurch gelingt es, bei gleichzeitiger Ebenung des Bildfeldes die chromatische Differenz der Bildkrümmungen zu verbessern, die sonst bei den großen Bildwinkeln aufzutreten pflegt, für die das Objektiv bestimmt ist.Lenses with such a structure can be improved according to the invention in that each of the two converging members consists of at least two lenses, one from the other have different color dispersion, such that the lens with the lower color dispersion is always the outsider and has a collecting refractive power and that each of these outsiders, converging lenses have a larger average refractive index than the diffusing ones Lens of the adjacent collecting outer member. This makes it possible at the same time Flatten the image field to improve the chromatic difference in the curvature of the image, which would otherwise occur with tends to occur at the large angles of view for which the lens is intended.

In der Abbildung ist ein Ausführungsbeispiel eines Objektivs nach der Erfindung dargestellt. Die ihm folgenden angegebenen Zahlenwerte beziehen sich auf das gezeichnete Beispiel. Die Erfindung ist jedoch auf dieses Beispiel nicht beschränkt.In the figure, an embodiment of an objective according to the invention is shown. the The numerical values given below refer to the example shown. The invention is but not limited to this example.

Das gezeichnete Beispiel bezieht sich auf ein Objektiv mit der Brennweite f = 94 mm, dem Öffnungsverhältnis ι : 4 und einem Bildfeld von etwa 6o°. Die Konstruktionsdaten sind die folgenden:The example shown relates to a lens with a focal length of f = 94 mm, an aperture ratio of ι: 4 and an image field of around 60 °. The design data are as follows:

r. =r. =

r. =r. =

+ 26,6
+ 00
+ 44.0
+ 19.39+ 26.6
+ 00
+ 44.0
+ 19.39

di = i2,o L1 d2= 2,83L2
O1 = 0,02
ds = 1.5 L3 d i = i2, o L 1 d 2 = 2.83L 2
O 1 = 0.02
d s = 1.5 L 3

1,6910
1,66761.6910
1.6676

54.8 4i,954.8 4i, 9

25.7 = + 15,225.7 = + 15.2

\= 8,1
%= 8,1 \ = 8.1
% = 8.1

19,3919.39

54,854.8

0000

28,428.4

1,7847 25,71.7847 25.7

»2 =»2 =

0,02
2,83 L5
12,0 L6 0.02
2.83 L 5
12.0 L 6

1,6676
1,69101.6676
1.6910

4i,9 54.84i, 9 54.8

Claims (1)

PATENTANSPRUCH:PATENT CLAIM: Objektiv für Photographic und Projektion, das zwei sammelnde und zwei zerstreuende Glieder, die von den sammelnden Gliedern umschlossen werden, enthält, wobei sämtliche acht Außenflächen der vier Glieder ihre hohlen Seiten dem von den Innengliedern begrenzten Blendenraum zuwenden und die den Blendenraum begrenzenden Flächen einen Scheitelabstand voneinander haben, der größer ist als vier Fünftel des arithmetischen Mittels aus den Krümmungsradien dieser Flächen, dadurch gekennzeichnet, daß jedes der beiden sammelnden Außenglieder aus mindestens zwei Linsen besteht, die eine voneinander verschiedene Farbenzerstreuung haben, derart, daß die Linse mit der geringeren Dispersion jedesmal die außenstehende ist und eine sammelnde Brechkraft hat, und daß jede der genannten, außenstehenden sammelnden Linsen einen größeren mittleren Brechungsindex hat als die ihr benachbarte zerstreuende Linse des Außengliedes.Lens for photographic and projection, the two collecting and two dispersing Limbs enclosed by the collecting limbs, containing all eight The outer surfaces of the four links have their hollow sides that are bounded by the inner links Turn the diaphragm space and the surfaces delimiting the diaphragm space a vertex distance of each other that is greater than four fifths of the arithmetic mean of the Radii of curvature of these surfaces, characterized in that each of the two collecting The outer links consist of at least two lenses that diffuse colors differently from one another in such a way that the lens with the lower dispersion always has the outer one is and has a collecting refractive power, and that each of the named, outsiders converging lenses have a larger average refractive index than their neighbors diffusing lens of the outer link.
DEZ2885A 1952-08-16 1952-08-17 Anastigmatic lens Expired DE972707C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEZ2885A DE972707C (en) 1952-08-16 1952-08-17 Anastigmatic lens

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE315644X 1952-08-16
DEZ2885A DE972707C (en) 1952-08-16 1952-08-17 Anastigmatic lens

Publications (1)

Publication Number Publication Date
DE972707C true DE972707C (en) 1959-09-10

Family

ID=25798439

Family Applications (1)

Application Number Title Priority Date Filing Date
DEZ2885A Expired DE972707C (en) 1952-08-16 1952-08-17 Anastigmatic lens

Country Status (1)

Country Link
DE (1) DE972707C (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE636167C (en) * 1933-07-27 1936-10-07 Zeiss Carl Fa Anastigmatic lens
FR816614A (en) * 1937-01-20 1937-08-12 Wide angle lens
US2559875A (en) * 1949-12-21 1951-07-10 Eastman Kodak Co Wide angle corrected photographic objective comprising four meniscus components in axial alignment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE636167C (en) * 1933-07-27 1936-10-07 Zeiss Carl Fa Anastigmatic lens
FR816614A (en) * 1937-01-20 1937-08-12 Wide angle lens
US2559875A (en) * 1949-12-21 1951-07-10 Eastman Kodak Co Wide angle corrected photographic objective comprising four meniscus components in axial alignment

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