DE1110904B - Fast, chromatic, spherical, astigmatic and comatic corrected photographic lens of the Dallmeyer type - Google Patents

Fast, chromatic, spherical, astigmatic and comatic corrected photographic lens of the Dallmeyer type

Info

Publication number
DE1110904B
DE1110904B DEK35499A DEK0035499A DE1110904B DE 1110904 B DE1110904 B DE 1110904B DE K35499 A DEK35499 A DE K35499A DE K0035499 A DEK0035499 A DE K0035499A DE 1110904 B DE1110904 B DE 1110904B
Authority
DE
Germany
Prior art keywords
pair
lens
photographic lens
spherical
dallmeyer
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.)
Pending
Application number
DEK35499A
Other languages
German (de)
Inventor
Dr Walter Lotmar
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.)
Leica Aarau AG
Original Assignee
Kern and Co 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 Kern and Co AG filed Critical Kern and Co AG
Priority to DEK35499A priority Critical patent/DE1110904B/en
Publication of DE1110904B publication Critical patent/DE1110904B/en
Pending legal-status Critical Current

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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

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

Description

Lichtstarkes, chromatisch, sphärisch, astigmatisch und komatisch korrigiertes photographisches Objektiv des Dallmeyer-Typs Lichtstarke, chromatisch, sphärisch, astigmatisch und komatisch korrigierte photographische Objektive des Dallmeyer-Typs, welche aus vier Gliedern bestehen, die in zwei Paaren angeordnet sind, wobei das dem einfallenden Licht zugekehrte Glied jedes Paares sammelnd und das diesem jeweils folgende Glied zerstreuend wirkt, sind bekannt. Derartige Objektive besitzen einen relativ kleinen Bildwinkel.Bright, chromatic, spherical, astigmatic and comatically corrected photographic lens of the Dallmeyer type bright, chromatic, spherical, astigmatically and comatically corrected photographic lenses of the Dallmeyer type, which consist of four members arranged in two pairs, the collecting the member of each pair facing the incident light and that of each pair the following link is known to have a dispersive effect. Such lenses have one relatively small angle of view.

Die vorliegende Erfindung betrifft ein derartiges photographisches Objektiv vom Dallmeyer-Typ, welches dadurch gekennzeichnet ist, daß das zerstreuende Glied des ersten Paares aus zweiverkitteten Linsen besteht, die durch eine sammelnde, dem einfallenden Licht ihre hohle Seite zukehrende Kittfläche verbunden sind.The present invention relates to such a photographic one Lens of the Dallmeyer type, which is characterized in that the dispersive Member of the first pair consists of two cemented lenses, which by a collecting, the hollow side facing cement surface are connected to the incident light.

Es wurde gefunden, daß sich die sphärischen Zonenfehler eines derart aufgebauten photographischen Objektivs, insbesondere diejenigen der schiefen Büschel, sowie auch die Abweichung der Brennweiten wesentlich verringern lassen, wenn gemäß der Erfindung in das zerstreuende Glied des ersten, dem einfallenden Licht zugekehrten Linsenpaares die erwähnte, gegen das einfallende Licht hohle, sammelnde Kittfläche eingeführt wird.It has been found that the spherical zone defects of such built-up photographic lens, especially those of the crooked tufts, as well as the deviation of the focal lengths can be reduced significantly, if according to of the invention in the dispersing member of the first, which is turned towards the incident light Pair of lenses the mentioned, hollow against the incident light, collecting cement surface is introduced.

Zweckmäßig besteht das zerstreuende Glied des ersten Paares aus einer ersten sammelnden Linse und einer zweiten, mit dieser verkitteten, zerstreuenden Linse, wobei der Brechungsindex der sammelnden Linse höher als derjenige der zerstreuenden Linse ist. Durch diese Maßnahme gelingt es, das Objektiv gemäß der Erfindung bis zu einem Öffnungsverhältnis von 1:1,4 mit sehr geringen sphärischen Zonenfehlern auszukorrigieren.Conveniently, the dispersive member of the first pair consists of one first collecting lens and a second, cemented with this, dispersing lens Lens, the refractive index of the converging lens being higher than that of the diffusing one Lens is. This measure makes it possible to achieve the objective according to the invention to to an aperture ratio of 1: 1.4 with very low spherical zone errors correct.

Es wurde ferner gefunden, daß sich die sphärochromatischen Fehler wesentlich vermindern lassen, wenn die Glasarten der beiden das zerstreuende Glied des ersten Paares bildenden Linsen derart gewählt werden, daß die Dispersion der sammelnden Linse höher als diejenige derzerstreuenden Linse ist. Dabei ist es weiterhin von Vorteil, für beide genannten Linsen Glasarten von an sich hoher Dispersion zu wählen.It was also found that the spherochromatic defects can be reduced substantially if the types of glass of the two are the dispersing element of the first pair of lenses are chosen so that the dispersion of the converging lens is higher than that of the diffusing lens. It is still there It is advantageous to use glass types of high dispersion per se for both lenses mentioned Select.

In Fig. 1 der Zeichnung ist ein Ausführungsbeispiel eines lichtstarken, chromatisch, sphärisch, astigmatisch und komatisch korrigierten photographischen Objektivs des Dallmeyer-Typs dargestellt.In Fig. 1 of the drawing is an embodiment of a bright, chromatic, spherical, astigmatic and comatically corrected photographic Lens of the Dallmeyer type shown.

Die vier Glieder des dargestellten photographischen Objektivs sind in der Reihenfolge, wie sie vom einfallenden Licht getroffen werden, mit L1, L2, L3 und L4 bezeichnet, so daß also die Glieder L1 und L2 das erste Paar und die Glieder L3 und L4 das zweite Paar bilden. Die Glieder L1 und L3 wirken sammelnd, die Glieder L2 und L4 zerstreuend. Das Glied L2 besteht aus zwei miteinander verkitteten Linsen, deren vordere, dem einfallenden Licht zugekehrte, sammelnd ist, während die mit ihr verkittete Linse zerstreuend wirkt. Wie aus Fig. 1 ersichtlich ist, kehrt die die beiden Linsen des Gliedes L., verbindende Kittfläche ihre hohle Seite dem einfaltenden Licht zu.The four members of the photographic lens illustrated are in the order in which they are hit by the incident light, with L1, L2, L3 and L4, so that the links L1 and L2 are the first pair and the links L3 and L4 form the second pair. The links L1 and L3 act collectively, the links Dissipating L2 and L4. The link L2 consists of two lenses cemented together, the front of which, facing the incident light, is collecting, while the one with her cemented lens has a diffusing effect. As can be seen from Fig. 1, the reverses the two lenses of the limb L., the cemented surface connecting its hollow side to the one that folds it in Light to.

In der nachstehenden Tabelle, welche die dem Objektiv gemäß Fig.1 entsprechenden, auf die Brennweite f = 100 bezogenen Angaben enthält, sind in üblicher Weise die Radien mit r, die Scheitelabstände mit d, die Brechwerte der verwendeten Gläser für die Farbe d mit nd und die Dispersionswerte bzw. Abbeschen Zahlen mit v bezeichnet. Glied r d ttd i, L1 J -I--73,69 19,28 1,6073 59,5 -179,64 3,30 -120,30 13,77 1,7408 28,0 L2 j -46,75 -f-373,0 6,88 1,7174 29,5 55,1 L(; -f-56,58 9,64 1,6516 58,5 -131,21 5,09 L4 1 -71,62 551 1,7408 28,0 -305,78 Fig. 2 zeigt die zugehörigen Kurven der sphärischen Aberration für die Farben c, d und g, und aus Fig. 3 ist der Verlauf der meridionalen und sagittalen Bildschale ersichtlich.In the table below, which contains the the lens Fig.1 appropriate according to, f to the focal length = 100-related information, the radii r, the vertex distances with d, the refractive indices are in the usual way, the glass used for the color d with nd and the dispersion values or Abbe's numbers are denoted by v. Term rd ttd i, L1 J -I - 73.69 19.28 1.6073 59.5 -179.64 3.30 -120.30 13.77 1.7408 28.0 L2 j -46.75 -f-373.0 6.88 1.7174 29.5 55.1 L (; -f-56.58 9.64 1.6516 58.5 -131.21 5.09 L4 1 -71.62 551 1.7408 28.0 -305.78 FIG. 2 shows the associated curves of the spherical aberration for the colors c, d and g, and FIG. 3 shows the course of the meridional and sagittal image shell.

Claims (5)

PATENTANSPRÜCHE; 1. Lichtstarkes, chromatisch, sphärisch, astigmatisch und komatisch korrigiertes photographisches Objektiv des Dallmeyer-Typs, welches aus vier Gliedern besteht, die in zwei Paaren angeordnet sind, wobei das dem einfallenden Licht zugekehrte Glied jedes Paares sammelnd und das diesem jeweils folgende Glied zerstreuend wirkt, dadurch gekennzeichnet, daß das zerstreuende Glied (L2) des ersten Paares (L1, L2) aus zwei verkitteten Linsen besteht, die durch eine sammelnde, dem einfallenden Licht ihre hohle Seite zukehrende Kittfläche verbunden sind. PATENT CLAIMS; 1. Bright, chromatic, spherical, astigmatic and a comatic corrected Dallmeyer-type photographic lens, which consists of four limbs arranged in two pairs, the one being incident Collecting the member of each pair facing the light and the member following it acts dispersive, characterized in that the dispersive member (L2) of the first Pair (L1, L2) consists of two cemented lenses, which are through a converging, the incident light are connected to their hollow side facing cement surface. 2. Photographisches Objektiv nach Anspruch 1, dadurch gekennzeichnet, daß von den beiden das zerstreuende Glied (L2) des ersten Paares (L1, L2) bildenden Linsen die dem einfallenden Licht zugekehrte Linse sammelnd und die mit dieser verkittete Linse zerstreuend wirkt. 2. A photographic lens according to claim 1, characterized in that of the two lenses forming the diffusing element (L2) of the first pair (L1, L2) the lens facing the incident light collectively and the lens cemented with it acts diffusively. 3. Photographisches Objektiv nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die sammelnde Linse des zweiten Gliedes (L2) des ersten Paares (L1, L2) eine höhere Dispersion aufweist als die mit ihr verkittete zerstreuende Linse. 3. Photographic lens according to claims 1 and 2, characterized in that that the converging lens of the second member (L2) of the first pair (L1, L2) one has higher dispersion than the divergent lens cemented with it. 4. Photographisches Objektiv nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die Abbeschen Zahlen der beiden das zweite Glied (L2) des. ersten Paares (L1, L2) bildenden Linsen kleiner als 35 sind. 4. Photography Objective according to Claims 1 to 3, characterized in that the Abbe Numbers of the two lenses forming the second member (L2) of the first pair (L1, L2) are smaller than 35. 5. Photographisches Objektiv nach den Ansprüchen 1 bis 4, gekennzeichnet durch die folgenden Konstruktionsdaten, von denen Abweichungen im Rahmen der Schwankungen in den Glasschmelzen zulässig sind: r1 = +73,69 dl ' 19,28 ndl = 1,6073 v1 = 59,5 r2 = -179,64 d_ 3 30 r3 = -120,30 2 d3 =13,77 nd 2 =1,7408 v,=28,0 r4 = -46,75 d4 = 6,88 nd3 =1,7174 13 = 29,5 r5 = +373,0 d 5 = 55,1 r6 = +56,58 21 d,9 9,64 nd4 =1,6516 v4 = 58,5 r' = -131,21 d, = 5,09 r8 = -71,62 r -305 78 de 5,51 nd5 =1,7408 v# = 28,0 9 =
In Betracht gezogene Druckschriften: Schweizerische Patentschrift Nr. 312 550.
5. Photographic lens according to claims 1 to 4, characterized by the following construction data, from which deviations are permissible within the scope of the fluctuations in the glass melts: r1 = +73.69 dl '19 .28 ndl = 1.6073 v1 = 59.5 r 2 = -179.64 d_ 3 30 r3 = -120.30 2 d3 = 13.77 nd 2 = 1.7408 v, = 28.0 r4 = -46.75 d4 = 6.88 nd3 = 1.7174 13 = 29.5 r5 = +373.0 d 5 = 55.1 r6 = +56.58 21 d, 9 9.64 nd4 = 1.6516 v4 = 58.5 r '= -131.21 d, = 5.09 r8 = -71.62 r -305 78 de 5.51 nd5 = 1.7408 v # = 28.0 9 =
Publications considered: Swiss patent specification No. 312 550.
DEK35499A 1958-08-09 1958-08-09 Fast, chromatic, spherical, astigmatic and comatic corrected photographic lens of the Dallmeyer type Pending DE1110904B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK35499A DE1110904B (en) 1958-08-09 1958-08-09 Fast, chromatic, spherical, astigmatic and comatic corrected photographic lens of the Dallmeyer type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK35499A DE1110904B (en) 1958-08-09 1958-08-09 Fast, chromatic, spherical, astigmatic and comatic corrected photographic lens of the Dallmeyer type

Publications (1)

Publication Number Publication Date
DE1110904B true DE1110904B (en) 1961-07-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
DEK35499A Pending DE1110904B (en) 1958-08-09 1958-08-09 Fast, chromatic, spherical, astigmatic and comatic corrected photographic lens of the Dallmeyer type

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DE (1) DE1110904B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH312550A (en) * 1953-11-04 1956-01-15 Paillard Sa Petzval objective

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH312550A (en) * 1953-11-04 1956-01-15 Paillard Sa Petzval objective

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