DE552789C - Photographic system in the manner of a Petzval lens - Google Patents

Photographic system in the manner of a Petzval lens

Info

Publication number
DE552789C
DE552789C DENDAT552789D DE552789DD DE552789C DE 552789 C DE552789 C DE 552789C DE NDAT552789 D DENDAT552789 D DE NDAT552789D DE 552789D D DE552789D D DE 552789DD DE 552789 C DE552789 C DE 552789C
Authority
DE
Germany
Prior art keywords
photographic system
manner
cemented
meniscus
petzval lens
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
DENDAT552789D
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.)
HUGH IVAN GRAMATZKI
Original Assignee
HUGH IVAN GRAMATZKI
Publication date
Application granted granted Critical
Publication of DE552789C publication Critical patent/DE552789C/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 -
    • G02B9/04—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having two components only

Landscapes

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

Description

Photographisches System nach Art eines Petzval-Objektivs Gegenstand der Erfindung ist eine weitere Ausgestaltung des photographischen Systems nach Patent 535 883. Bei diesem Objektiv findet ein positiver Meniskus Verwendung, der im Hinterglied zwischen einem negativen Meniskus und einer bikonvexen Linse eingekittet ist. Das Verkitten dieser drei Linsen ist nicht leicht, da der positive Meniskus mit seinen scharfen Rändern sich sehr schwer zentrisch halten läßt, auch wenn besondere Vorkehrungen getroffen werden. Weit leichter ist das Verkitten des Hintergliedes, wenn das mittlere Element nach der Erfindung ein negativer Meniskus ist. Um die erforderliche Korrektion zu erzielen, wird dieser Meniskus aus einem Glase hergestellt, dessen Brechkraft höher ist als die der Gläser der ihn einschließenden Linsen, so daß die erste der beiden gegen das einfallende Licht gewölbten Flächen des eingekitteten Meniskus sammelnd, die zweite zerstreuend wirkt. In der Zeichnung ist folgendes Ausführungsbeispiel schematisch dargestellt. F = Zoo, Öffnungsverhältnis 1: 1,4 73.46 d, 23,9 7... -62,35 dz 3,67 y4 L Luftabstand ,2,6 F = Zoo, Öffnungsverhältnis I : 1,4 -f- y2,5 d3 2,75 y6;7 + 42,62 d1 1,4 y8'9 + 31,04 d5 I3,8 ylo -I15,39 Glassorten I nD 1,5827 1' = 46,5 II nD I,7174 1@ = 29,5 III nD 1,5182 11 = 59,0 IV nD 1,6646 91 = 35,7 V nD 1,516o v = 56,8 Photographic system in the manner of a Petzval objective The subject of the invention is a further embodiment of the photographic system according to patent 535,883. In this objective, a positive meniscus is used which is cemented in the rear phalanx between a negative meniscus and a biconvex lens. The cementing of these three lenses is not easy, since the positive meniscus with its sharp edges is very difficult to keep centered, even if special precautions are taken. The cementing of the rear limb is far easier if the middle element according to the invention is a negative meniscus. In order to achieve the necessary correction, this meniscus is made of a glass whose refractive power is higher than that of the glasses of the lenses enclosing it, so that the first of the two surfaces of the cemented meniscus curved against the incident light has a converging effect, the second has a diffusing effect. The following exemplary embodiment is shown schematically in the drawing. F = zoo, focal ratio 1: 1.4 73.46 d, 23.9 7 ... -62.35 dz 3.67 y4 L Air clearance, 2.6 F = zoo, focal ratio I: 1.4 -f- y2.5 d3 2.75 y6; 7 + 42.62 d1 1.4 y8'9 + 31.04 d 5 I3.8 ylo -I15.39 Types of glass I nD 1.5827 1 '= 46.5 II nD I, 7174 1 @ = 29.5 III nD 1.5182 11 = 59.0 IV nD 1.6646 91 = 35.7 V nD 1.516ov = 56.8

Claims (2)

PATENTANSPRÜCHE: i. Photographisches System nach Patent 535 883, dadurch gekennzeichnet, daß der mit seinen Flächen gegen das einfallende Licht zu gewölbte, eingekittete Meniskus als negativer Meniskus ausgebildet ist. PATENT CLAIMS: i. Photographic system according to patent 535,883, thereby characterized that the curved with its surfaces against the incident light, cemented meniscus is designed as a negative meniscus. 2. Photographisches System nach Anspruch I, dadurch gekennzeichnet, daß der eingekittete negative Meniskus aus einem Glase hergestellt ist, dessen Brechkraft höher ist als die der Gläser der ihn einschließenden Linsen, so daß die erste Kittfläche sammelnd, die zweite zerstreuend wirkt.2. Photography System according to Claim I, characterized in that the cemented-in negative meniscus is made of a glass whose refractive power is higher than that of the glasses of the lenses enclosing it, so that the first cemented surface collects the second has a distracting effect.
DENDAT552789D Photographic system in the manner of a Petzval lens Expired DE552789C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE552789T

Publications (1)

Publication Number Publication Date
DE552789C true DE552789C (en) 1933-06-27

Family

ID=6563522

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT552789D Expired DE552789C (en) Photographic system in the manner of a Petzval lens

Country Status (1)

Country Link
DE (1) DE552789C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1086911B (en) * 1953-11-04 1960-08-11 Paillard Sa Petzval photographic lens

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1086911B (en) * 1953-11-04 1960-08-11 Paillard Sa Petzval photographic lens

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