DE1921418B2 - Wide-angle objective - with large width of intersection on side of image and comprising eight lenses in three groups - Google Patents

Wide-angle objective - with large width of intersection on side of image and comprising eight lenses in three groups

Info

Publication number
DE1921418B2
DE1921418B2 DE19691921418 DE1921418A DE1921418B2 DE 1921418 B2 DE1921418 B2 DE 1921418B2 DE 19691921418 DE19691921418 DE 19691921418 DE 1921418 A DE1921418 A DE 1921418A DE 1921418 B2 DE1921418 B2 DE 1921418B2
Authority
DE
Germany
Prior art keywords
wide
lenses
objective
none
image
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
Application number
DE19691921418
Other languages
German (de)
Other versions
DE1921418A1 (en
DE1921418C3 (en
Inventor
Walter Dipl.-Phys.; Edwards Gary; Wagner Erich; Midland Ontario Mandler (Kanada)
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.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz 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 Ernst Leitz GmbH filed Critical Ernst Leitz GmbH
Priority to DE19691921418 priority Critical patent/DE1921418C3/en
Priority claimed from DE19691921418 external-priority patent/DE1921418C3/en
Publication of DE1921418A1 publication Critical patent/DE1921418A1/en
Publication of DE1921418B2 publication Critical patent/DE1921418B2/en
Application granted granted Critical
Publication of DE1921418C3 publication Critical patent/DE1921418C3/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00Optical objectives specially designed for the purposes specified below
    • G02B13/04Reversed telephoto objectives

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The manufacturing data of the wide-angle objective are close to the data of a table specifying radii of curvature and thicknesses so that none of the area refraction powers deviate by more than 0.4 x 1/f and none of the vertical distances by more than 0.05 xf from the relevant values given in the table. The first and last element of a three-element objective have negative refractive powers and the centre element has positive refractive power. The diaphragm is positioned between the second and third element. The objectives are very suitable for mirror reflex cameras or cameras which feature a light-sensitive element between the objective and the picture window.

Description

1,58482 40,581.58482 40.58

1,74795
1,76847
1.74795
1.76847

44,49
26,74
44.49
26.74

Blendenraum
1,56295 46,88
Aperture space
1.56295 46.88

1,72340
1,76847
1.72340
1.76847

50,17
26,74
50.17
26.74

1,56295 46,881.56295 46.88

Die Erfindung betrifft ein Weitwinkelobjektiv mit großer bildseitiger Schnittweite nach Patent 17 72 665.The invention relates to a wide-angle lens with a large focal length on the image side according to patent 17 72 665.

In dem deutschen Patent 17 72 665 sind dreigliedrige Objektive beschrieben, deren erstes und letztes Glied eine negative Brechkraft und deren mittleres Glied eine positive Brechkraft besitzen. Die Blende ist zwischen dem zweiten und dritten Glied angeordnet.In the German patent 17 72 665 three-part lenses are described, the first and the last link has a negative refractive power and the middle link has a positive refractive power. the Aperture is arranged between the second and third links.

Die einzelnen Glieder dieser Objektive bestehen aus mindestens einer Linse, wobei das mittlere positive Glied vorzugsweise aus zwei Linsen entgegengesetzter Brechkraft verkittet ist. Das vor der Blende stehende Glied mit negativer Brechkraft weist vorteilhaft ausschließlich zur Blende hohle Flächen auf, seine Brechkraft ist, absolut genommen, größer als die Gesamtbrennweite des Objektivs. Die unmittelbar auf die Blende folgende Fläche des hinter der Blende stehenden Gliedes mit negativer Brechkraft und die letzte bildseitige Fläche sollen bevorzugt zur Blende hin hohl sein, ihre Krümmungsradien sollen kleiner sein als die Gesamtbrennweite des Objektivs.The individual links of these lenses consist of at least one lens, the middle one being positive Member is preferably cemented from two lenses of opposite refractive power. The one in front of the screen A member with a negative refractive power advantageously has hollow surfaces only towards the diaphragm, its refractive power is, in absolute terms, larger than the total focal length of the lens. The immediate to the Aperture following surface of the segment behind the aperture with negative refractive power and the last The surface on the image side should preferably be hollow towards the diaphragm, and their radii of curvature should be smaller than the total focal length of the lens.

Objektive mit diesem generellen Aufbau sind besonders günstig als Weitwinkelobjektive zu benutzen, die eine große bildseitige Schnittweite aufweisen. Sie sind daher sehr gut für Spiegelreflexkameras oder für Kameras, bei denen zwischen Objektiv und Bildfenster ein (ausschwenkbares) lichtempfindliches Element angeordnet ist, geeignet.
Ein Objektiv nach diesem Patent ist mit seinen Daten in der Tabelle des Anspruchs beschrieben. Von den angegebenen Werten kann zur Berechnung weiterer Objektive mit guter Korrektion so weit abgegangen werden, daß Änderungen der Flächenbrechkräfte dem Betrage nach kleiner als 0,4 · -j und Änderungen der Scheitelabstände dem Betrage nach kleiner als 0,05 · / bleiben.
Lenses with this general structure can be used particularly favorably as wide-angle lenses which have a large focal length on the image side. They are therefore very suitable for single-lens reflex cameras or for cameras in which a light-sensitive element (which can be swiveled out) is arranged between the lens and the image window.
A lens according to this patent is described with its data in the table of the claim. To calculate further objectives with good correction, the specified values can be deviated to such an extent that changes in the surface powers remain less than 0.4 · -j and changes in the vertex distances remain less than 0.05 · /.

In der Zeichnung ist das Objektiv nach der Erfindung dargestellt, und zwar zeigt
5j, F i g. 1 einen Linsenschnitt,
In the drawing, the lens according to the invention is shown, namely shows
5j, FIG. 1 a lens cut,

F i g. 2 die Korrektionskurven für die sphärische Aberration, den Astigmatismus und die Verzeichnung undF i g. 2 the correction curves for spherical aberration, astigmatism and distortion and

F i g. 3 die Korrektionskurven der Queraberrationen. F i g. 3 the correction curves for the transverse aberrations.

In F i g. 1 sind die Krümmungsradien der Linsenflächen mit T1 bis ru und die Abstände der Linsenscheitel mit Q1 bis O13 bezeichnet.In Fig. 1, the radii of curvature of the lens surfaces are denoted by T 1 to r u and the distances between the lens vertices are denoted by Q 1 to O 13.

Hierzu 3 Blatt ZeichnungenFor this purpose 3 sheets of drawings

Claims (1)

Patentanspruch:Claim: Weitwinkelobjektiv nach Patent 17 72 665, d adurch gekennzeichne t, daß seine Fertigungsdaten so dicht bei den Daten der folgenden Tabelle liegen, daß keine der Flächenbrechkräfte dem Betrage nach um mehr als 0,4 · -j und keiner der Scheitelabstände dem Betrage nach um mehr als 0,05 · / von den betreffenden, in der Tabelle angegebenen Werten abweichenWide-angle lens according to patent 17 72 665, characterized by the fact that its manufacturing data are so close to the data in the following table that none of the surface powers by more than 0.4 · -j and none of the vertex distances by more than 0.05 · / deviate from the relevant values given in the table T1 = +1,670T 1 = +1.670 r% = +0,817 r % = +0.817 r3 = +1,098r 3 = +1.098 r4 = +0,683r 4 = +0.683 rs = +0,640r s = +0.640 re = -1,098r e = -1.098 T1 = -26,766 T 1 = -26.766 r8 = -0,371r 8 = -0.371 ra = -0,438 r a = -0.438 r10 = -4,660r 10 = -4.660 ru = -0,331r u = -0.331 r1% = -0,812 r 1% = -0.812 r13 r 13 = -0,397= -0.397 r14= -0,677r 14 = -0.677 O1 =0,084 a2 =0,271 a3 =0,063 at =0,616 a5 =0,420 αβ =0,056 σ7 =0,212 α8 = 0,073 αβ =0,005 βΜ = 0,161 αη <= 0,051 α12 = 0,121 α13 = 0,065 ί' = 0,7235 ne.
1,58482
O 1 = 0.084 a 2 = 0.271 a 3 = 0.063 a t = 0.616 a 5 = 0.420 α β = 0.056 σ 7 = 0.212 α 8 = 0.073 α β = 0.005 β Μ = 0.161 α η <= 0.051 α 12 = 0.121 α 13 = 0.065 ί '= 0.7235 n e .
1.58482
40,5840.58
DE19691921418 1969-04-26 Wide angle lens Expired DE1921418C3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19691921418 DE1921418C3 (en) 1969-04-26 Wide angle lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691921418 DE1921418C3 (en) 1969-04-26 Wide angle lens

Publications (3)

Publication Number Publication Date
DE1921418A1 DE1921418A1 (en) 1970-11-12
DE1921418B2 true DE1921418B2 (en) 1976-07-08
DE1921418C3 DE1921418C3 (en) 1977-03-03

Family

ID=

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0262407A1 (en) * 1986-09-02 1988-04-06 Jos. Schneider Optische Werke Kreuznach GmbH & Co. KG Compact wide angle lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0262407A1 (en) * 1986-09-02 1988-04-06 Jos. Schneider Optische Werke Kreuznach GmbH & Co. KG Compact wide angle lens

Also Published As

Publication number Publication date
DE1921418A1 (en) 1970-11-12

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)