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DE697038C - Lens consisting of four simple lenses - Google Patents

Lens consisting of four simple lenses

Info

Publication number
DE697038C
DE697038C DE1937O0023264 DEO0023264D DE697038C DE 697038 C DE697038 C DE 697038C DE 1937O0023264 DE1937O0023264 DE 1937O0023264 DE O0023264 D DEO0023264 D DE O0023264D DE 697038 C DE697038 C DE 697038C
Authority
DE
Germany
Prior art keywords
lenses
flint
objective
inner member
biconcave
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
DE1937O0023264
Other languages
German (de)
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.)
Optische Werke G Rodenstock
Original Assignee
Optische Werke G Rodenstock
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 Optische Werke G Rodenstock filed Critical Optische Werke G Rodenstock
Priority to DE1937O0023264 priority Critical patent/DE697038C/en
Application granted granted Critical
Publication of DE697038C publication Critical patent/DE697038C/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

Landscapes

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

Description

Aus vier einfachen Linsen bestehendes Objektiv Die Erfindung geht aus von einem sphärisch, chromatisch, astigmatisch, komatisch und orthoskopisch korrigierten, aus vier einfachen Linsen bestehenden Objektiv, dessen äußere Glieder aus Kronglas bestehen und bikonvexe Form haben und dessen innenliegende, durch Lufträume unter sich und gegen die außenliegenden Kronlinsen getrennte Glieder aus Flintglas bestehen, von denen das auf der Seite der größeren Strahlenweite liegende innere Glied bikonkav und das andere innere Glied ein zerstreuender Meniskus ist, der seine erhabene Fläche der Bikonkavlinse zuwendet.Lens consisting of four simple lenses The invention works out of a spherical, chromatic, astigmatic, comatic and orthoscopic corrected lens consisting of four simple lenses, its outer links consist of crown glass and have a biconvex shape and its interior, through air spaces Separate flint glass links below and against the outer crown lenses exist, of which the inner lying on the side of the greater ray range The limb is biconcave and the other inner limb is a dispersing meniscus, which is his raised surface facing the biconcave lens.

Bei der Benutzung dieses bekannten Objektivtypus hoher Lichtstärke für Ausführungen in sehr kurzen Brennweiten (etwa i cm) ergaben sich Schwierigkeiten, da bei der ' üblichen proportionalen Verkleinerung des Systems von z. B. ioo mm Brennweite keine genügenden Auflagen der Linsen für ihre sichere Lagerung in den Fassungen verblieben. Um in dieser Hinsicht zum Ziele zu kommen, mußten bei einem solchen für die Ausführung in längeren Brennweiten bekanntgewordenen Objektiv zusätzliche Bedingungen eingeführt werden, die seine Ausführung in sehr kurzen Brennweiten, also mit unverhältnismäßig großen Dicken. und Luftabständen möglich machen, ohne daß die Korrektion durch die Vergrößerung besonders der Dicken der Linsen vernichtet wird.When using this known type of lens with a high light intensity for designs in very short focal lengths (about 1 cm), difficulties arose because in the ' usual proportional downsizing of the system of z. B. ioo mm focal length insufficient conditions of the lenses for their safe storage in the mounts remained. In order to achieve the goal in this regard, additional conditions had to be introduced in such a lens, which has become known for the execution in longer focal lengths, which make its execution in very short focal lengths, that is to say with disproportionately large thicknesses. and make air gaps possible without the correction being destroyed by increasing the thickness of the lenses in particular.

Die hierdurch eintretenden Bildfehler lassen sich beseitigen, wenn man nach der E rfindung den Blendenraum zwischen den beiden Flintlinsen höchstens 75 0/,) der Summe der beiden anderen Lufträume bemißt und gleichzeitig die gegeneinandergekehrten Radien der Innenlinsen einander so sehr nähert, daß die Differenz ihrer Kehrwerte kleiner als 25 0/, des Kehrwerts der Objektivbrennweite ist.The resulting image errors can be eliminated if, according to the invention, the aperture space between the two flint lenses is at most 75 % of the sum of the two other air spaces and at the same time the opposing radii of the inner lenses approximate each other so closely that the difference between their reciprocal values is less than 25 0 /, of the reciprocal of the lens focal length.

Im folgenden ist ein AusfüÜrungsbeispiel der Erfmdung für die Brennweite f = io nun und eine relative Öffnung von 1: 2 angegeben: 71 5,263 d, i,go LI i#,i 1,6073 v 59,5 Y, «= - 28,413 r3 = 7,o63 d, = 0,38 Li-, md i,6:zoo V 36,3 7, = 40,382 12 = 0,45 la = 0,34 = + 36,533 da = 0,38 Lii, it,1 # i,62oo V = 36,3 r(; = + 3,603 14 = 0,735 r7 = + 6,153 (14 = I,7o Liv nd = 1,6073 p = 59,5 5,358 In the following, a AusfüÜrungsbeispiel the Erfmdung for the focal length f = io now and a relative aperture of 1: 2 is indicated: 71 5.263 d, i, go LI i #, i 1.6073 v 59.5 Y, «= - 28.413 r3 = 7, o63 d, = 0.38 Li, md i, 6: zoo V 36.3 7, = 40.382 12 = 0.45 la = 0.34 = + 36.533 da = 0.38 Lii, it, 1 # i, 62oo V = 36.3 r (; = + 3.603 14 = 0.735 r7 = + 6.153 (14 = 1.7 Liv nd = 1.6073 p = 59.5 5.358

Claims (1)

PATENNTANSPRUCH - Sphärisch, chromatiEch, astigmatisch, komatisch und orthoskopisch korrigiertes, aus vier einfachen Linsen bestehendes Ob- jektiv, dessen äußere Glieder aus Kronglas bestehen und bikonvexe Form haben und dessen innenliegende, durch Lufträume unter sich und gegen die außenliegenden Kronlinsen getiennte Gliede--- aus Flintglas bestehen, von denen das auf der Seite der größeren Strahlenweite liegende innere Glied bikonkav und das andere innere Glied ein zerstreuenderMeniskusist,derseineerhabene Fläche der Bikonkavlinse zuwendet, dadurch gekennzeichnet, daß der Luftraum zwiSchen. den beiden Flintlinsen höchstens 75 0/, der Summe der beiden anderen Lufträume des Objektivs beträgt und daß der Unterschied der absoluten Kehrwerte der einander zugewendeten Radien der Flintlinsen weniger als 25 0/, des Kehrwerts der Objektivbrennweite beträgt.PATENNTANSPRUCH - Spherical, chromatiEch, astigmatic, coma table and orthoscopic corrected, consisting of four simple lenses objectively, the outer limbs are made of crown glass and have bi-convex shape and its internal, getiennte by air spaces among themselves and against the outer Kronlinsen limb --- consist of flint glass, of which the inner member lying on the side of the greater beam width is biconcave and the other inner member is a dispersing meniscus, which faces the raised surface of the biconcave lens, characterized in that the air space between. the two flint lenses is at most 75 0 /, the sum of the two other air spaces of the objective and that the difference in the absolute reciprocal values of the radii of the flint lenses facing each other is less than 25 0 /, the reciprocal of the focal length of the objective.
DE1937O0023264 1937-11-10 1937-11-10 Lens consisting of four simple lenses Expired DE697038C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1937O0023264 DE697038C (en) 1937-11-10 1937-11-10 Lens consisting of four simple lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1937O0023264 DE697038C (en) 1937-11-10 1937-11-10 Lens consisting of four simple lenses

Publications (1)

Publication Number Publication Date
DE697038C true DE697038C (en) 1940-10-04

Family

ID=7355928

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1937O0023264 Expired DE697038C (en) 1937-11-10 1937-11-10 Lens consisting of four simple lenses

Country Status (1)

Country Link
DE (1) DE697038C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494025A (en) * 1948-05-28 1950-01-10 Eastman Kodak Co Optical objectives with two-part negative component having variable central air space of zero power

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494025A (en) * 1948-05-28 1950-01-10 Eastman Kodak Co Optical objectives with two-part negative component having variable central air space of zero power

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