DE435762C - Photographic lens - Google Patents

Photographic lens

Info

Publication number
DE435762C
DE435762C DEE31449D DEE0031449D DE435762C DE 435762 C DE435762 C DE 435762C DE E31449 D DEE31449 D DE E31449D DE E0031449 D DEE0031449 D DE E0031449D DE 435762 C DE435762 C DE 435762C
Authority
DE
Germany
Prior art keywords
lens
air space
length
photographic lens
collecting
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
DEE31449D
Other languages
German (de)
Inventor
Ludwig Bertele
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.)
Ernemann Werke AG
Original Assignee
Ernemann Werke AG
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 Ernemann Werke AG filed Critical Ernemann Werke AG
Priority to DEE31449D priority Critical patent/DE435762C/en
Application granted granted Critical
Publication of DE435762C publication Critical patent/DE435762C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/34Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only

Landscapes

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

Description

Photographisches Objektiv. Die Erfindung bezieht sich auf eine Verbesserung in der Konstruktion von Objektivem, welche aus einem von zwei sammelndem. Gliedern umfaßten zerstreuendem. Glied bestehen, von denen das vordere sammelnde Glied aus zwei je eine Kittfläche enthaltenden getrennten Sammellinsen besteht. Das Objektiv nach der Patentschrift 401274 ist so konstruiert, d;aß nach dem zerstreuenden Glied eine Konvergenz des auf das Objektiv achsenparällel auffallenden Büschels vorhanden ist, die kleiner ist als das Fünffache der Gesamtbrennweite .des Objektivs.Photographic lens. The invention relates to an improvement in the construction of objectives, which consist of one of two collecting. Limbs included dissipative. Limb consist of which the anterior collecting limb is made up of consists of two separate converging lenses each containing a cemented surface. The objective according to the patent specification 401274 is so constructed that ate after the dispersing member there is a convergence of the bundle which is incident on the axis parallel to the lens that is smaller than five times the total focal length of the lens.

Die Verbesserung besteht nun darin, daß es gelungen ist, die Baulänge dieser Objektive zu verkürzen, und zwar soll der dritte. Luftraum nicht größer sein als ein Viertel der gesamten Baulänge des Objektivs. Um die Verkürzung des Objektivs bei einwandfreier Leistungsfähigkeit zu erreichen, muß erfindungsgemäß der Strahlengang nach dem zerstreuenden Glied so geändert werden, daß die auf das Objektiv auffallenden achsenparallelen Büschel bei ihrem Austritt ausdem zerstreuenden Glied divergieren oder höchstens so konvergieren, daß ihr Konvergenzpunkt weiter entfernt liegt als das Fünffache der Gesamtbrennweite des Objektivs. Durch die .geringe Baulänge des Objektivs wird eine wesentliche Erleichterung im Einbau der Objektive in Kameras erreicht.The improvement now consists in the fact that it has been possible to reduce the overall length to shorten these lenses, namely the third one. Airspace should not be larger than a quarter of the overall length of the lens. To shorten the lens In accordance with the invention, the beam path must be achieved with perfect performance after the dispersing member can be changed in such a way that those striking the lens axially parallel tufts diverge on their exit from the dispersing member or at most converge so that their point of convergence is further away than five times the total focal length of the lens. Because of the low The overall length of the lens makes it much easier to install the lenses achieved in cameras.

Das nachstehende und in der Zeichnung dargestellte Ausführungsbeispiel zeigt ein Objektiv nach der Erfindung. Der dritte Luftraum beträgt bei diesem Beispiel nur etwa ein Sechstel der Gesamtbaulänge des Objektivs.The embodiment shown below and in the drawing shows an objective according to the invention. The third airspace in this example is only about one sixth of the overall length of the lens.

Beispiel. Öffnungsverhältnis 1: 2; f == 1oo mm. y, + 52,14_ dl 1474 y2 - 12922 (l2 1,81 y3 + 243,14 11 0,56 y4 + 52,03 @s 17@ 57 ys - 4455 d4 1270 yB + 100,61 12 4,81 93,51 dz 0,91 y$ + 30,61 h 11,34 y. + 6858 d6 10,71 yio - 4391 nD nG L1 1,6117 1,625o I L2 1,6728 -1,7oo89 L3 1,606o2 1,62198 L4 1,58928 1,6o145 L6 1,6728 1,70089 L 6 45241 1>53663. Example. Aperture ratio 1: 2; f == 1oo mm. y, + 52.14_ dl 1474 y2 - 12922 (l2 1.81 y3 + 243.14 11 0.56 y4 + 52.03 @s 17 @ 57 ys - 4455 d4 1270 yB + 100.61 12 4.81 93.51 dz 0.91 y $ + 30.61 h 11.34 y. + 6858 d6 10.71 yio - 4391 nD nG L1 1.6117 1.625o I. L2 1.6728 -1.7oo89 L3 1.606o2 1.62198 L4 1.58928 1.60145 L6 1.6728 1.70089 L 6 45241 1> 53663.

Claims (1)

PATENT-ANSPRUCI3: Photographisches Objektiv, bestehend aus einem von zwei sammelnden Gliedern mit dazwischenliegendem Luftraum umfaßten zerstreuenden Glied, von denen das vordere sammelnde Glied aus mindestens zwei je eine. Kittfläche enthaltenden Sammellinsen besteht, dadurch gekennzeichnet, daß die Länge des Luftraums zwischen dem zerstreuenden Glied und dem hinteren sammelnden Glied höchstens ein Viertel der ,gesamten Baulänge des Objektivs beträgt und die auf das Objektiv auffallenden achsenparallelen Büschel bei ihrem Austritt aus dem zerstreuenden Glied im darauffolgenden Luftraum divergieren oder so konvergieren, daß ihr Konvergenzpunkt weiterentfernt liegt als das Fünffache der Gesamtbrennweite des Objektivs. PATENT-ANSPRUCI3: Photographic lens, consisting of a dispersing element comprised of two collecting elements with an air space in between, of which the front collecting element consists of at least two each. Converging lenses containing cemented surface, characterized in that the length of the air space between the diffusing element and the rear converging element is at most a quarter of the total length of the lens and the axially parallel tufts striking the objective when they exit the diffusing element in the subsequent air space diverge or converge so that their point of convergence is further away than five times the total focal length of the lens.
DEE31449D 1924-10-25 1924-10-25 Photographic lens Expired DE435762C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEE31449D DE435762C (en) 1924-10-25 1924-10-25 Photographic lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE31449D DE435762C (en) 1924-10-25 1924-10-25 Photographic lens

Publications (1)

Publication Number Publication Date
DE435762C true DE435762C (en) 1926-10-19

Family

ID=7075066

Family Applications (1)

Application Number Title Priority Date Filing Date
DEE31449D Expired DE435762C (en) 1924-10-25 1924-10-25 Photographic lens

Country Status (1)

Country Link
DE (1) DE435762C (en)

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