DE1921418A1 - Wide angle lens - Google Patents

Wide angle lens

Info

Publication number
DE1921418A1
DE1921418A1 DE19691921418 DE1921418A DE1921418A1 DE 1921418 A1 DE1921418 A1 DE 1921418A1 DE 19691921418 DE19691921418 DE 19691921418 DE 1921418 A DE1921418 A DE 1921418A DE 1921418 A1 DE1921418 A1 DE 1921418A1
Authority
DE
Germany
Prior art keywords
angle lens
wide angle
lens
refractive power
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.)
Granted
Application number
DE19691921418
Other languages
German (de)
Other versions
DE1921418B2 (en
DE1921418C3 (en
Inventor
Gary Edwards
Erich Wagner
Mandler Dipl-Phys Walter
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 Wetzlar 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 Wetzlar GmbH filed Critical Ernst Leitz Wetzlar 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)

Description

Weitwinkelobjektiv Die Erfindung betrifft ein Weitwinkelobjektiv mit großer bildseitiger Schnittweite nach Patent ... (Patentanmeldung P 17 72 665.7). Wide-angle lens The invention relates to a wide-angle lens with large focal length on the image side according to patent ... (patent application P 17 72 665.7).

In der Patentschrift ... (Patentanmeldung P 17 72 665.7) 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 patent ... (patent application P 17 72 665.7) are tripartite Lenses described whose first and last link have a negative refractive power and the middle link of which has a positive refractive power. The aperture is between the second and third link arranged.

Die einzelnen Glieder dieser Objektive bestehen aus mindestens einer Linse, wobei das mittlere positive Glied vorzugsweise aus zwei Linsen entgegengesetzter Brechkraft verkittet ist.The individual links of these lenses consist of at least one Lens, with the middle positive member preferably made up of two opposing lenses Refractive power is cemented.

Das vor der Blende stehende Glied mit negativer Brechkraft weist vorteilhaft ausschließlich zur Blende hohle Flächen auf, seine Brechkraft ist, absolut genommen, großer 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 element with negative refractive power standing in front of the diaphragm has advantageous exclusively for the aperture, its refractive power is, taken in absolute terms, larger than the total focal length of the lens. The one immediately following the aperture Area of the member standing behind the diaphragm with negative refractive power and the The last surface on the image side should preferably be hollow towards the diaphragm, 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.Lenses with this general structure are particularly cheap as To use wide-angle lenses that have a large focal length on the image side. They are therefore very good for SLR cameras or for cameras with those between Lens and image window a (pivotable) light-sensitive element arranged is suitable.

Ein ObJektiv nach diesem Patent ist mit seinen Daten in der Tabelle des Anspruches beschrieben. Von den angegebenen Werten kann zur Berechnung weiterer Objektive nit guter Korrektion soweit abgegangen werden, daß Änderungen der Flächenbrechkräfte der Betrage nach kleiner als 0e4 .A lens according to this patent is with its data in the table of the claim described. You can use the specified values to calculate additional Lenses with good correction are gone so far that changes in the surface powers the amount after less than 0e4.

und Änderungen der Scheitelabstände dem Betrage nach kleiner als 0,05 . f bleiben.and changes in the vertex spacings are less than 0.05 in magnitude . f stay.

In der beigefügten Zeichnung ist das Objektiv nach der Erfindung dargestellt.In the accompanying drawing, the lens according to the invention is shown.

Claims (1)

Anspruch claim Weitwinkelobjektiv nach patent ... (Patentanmeldung p 17 72 665.7), d a d u r c h g e k e n n z e i c h n e t, daß seine Fertigungedaten no dicht bei den Daten der folgenden Tabelle liegen, daß keine der Flächenbrechkräfte dem Betrage nach um mehr als 0,4 . 1/@ und keiner der Scheitelabstände dem Betrage nach um mehr als 0,05 . f von den betreffenden, in der Tabelle angegebenen Verten abweichen n@ v@ r1 = +1,670 a1 = 0,084 1,58482 40,58 r2 = +0,817 a2 = 0,271 r3 = +1,098 a3 = 0,063 1,38482 40,58 r4 = +0,683 a4 = 0,616 r5 = +0,640 a4 = 0,420 1,74795 44,49 r6 = -1,098 a5 = 0,056 1,76847 26,74 r7 = -26,766 a6 = 0,212 Blendenraum r8 = -0,371 a7 = 0,073 1,56295 46,88 r9 = -0,438 a8 = 0,005 r10 = -4,660 a9 = 0,161 1,72340 50,17 r11 = -0,331 a10 = 0,051 1,76847 26,74 r12 = -0,812 a11 = 0,121 r13 = -0,397 a12 = 0,065 1,56295 46,88 r14 = -0,677 a13 = 0,7235 L e e r s e i t e Wide-angle lens according to patent ... (patent application p 17 72 665.7), d u r c h e k e n n n z e i c h n e t that his manufacturing data are no close to the data in the following table lie that none of the surface powers correspond to the amount after by more than 0.4. 1 / @ and none of the vertex distances by more than 0.05. f deviate from the relevant vertices given in the table n @ v @ r1 = +1.670 a1 = 0.084 1.58482 40.58 r2 = +0.817 a2 = 0.271 r3 = +1.098 a3 = 0.063 1.38482 40.58 r4 = +0.683 a4 = 0.616 r5 = +0.640 a4 = 0.420 1.74795 44.49 r6 = -1.098 a5 = 0.056 1.76847 26.74 r7 = -26.766 a6 = 0.212 orifice space r8 = -0.371 a7 = 0.073 1.56295 46.88 r9 = -0.438 a8 = 0.005 r10 = -4.660 a9 = 0.161 1.72340 50.17 r11 = -0.331 a10 = 0.051 1.76847 26.74 r12 = -0.812 a11 = 0.121 r13 = -0.397 a12 = 0.065 1.56295 46.88 r14 = -0.677 a13 = 0.7235 R e r s e i t e
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 true DE1921418A1 (en) 1970-11-12
DE1921418B2 DE1921418B2 (en) 1976-07-08
DE1921418C3 DE1921418C3 (en) 1977-03-03

Family

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Also Published As

Publication number Publication date
DE1921418B2 (en) 1976-07-08

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Legal Events

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