DE373397C - Spherically, chromatically and astigmatically corrected lens - Google Patents

Spherically, chromatically and astigmatically corrected lens

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Publication number
DE373397C
DE373397C DEP44872D DEP0044872D DE373397C DE 373397 C DE373397 C DE 373397C DE P44872 D DEP44872 D DE P44872D DE P0044872 D DEP0044872 D DE P0044872D DE 373397 C DE373397 C DE 373397C
Authority
DE
Germany
Prior art keywords
cemented
chromatically
lens
lenses
spherically
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
DEP44872D
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.)
Pruemm & Genossen Dr GmbH
Original Assignee
Pruemm & Genossen Dr GmbH
Publication date
Priority to DEP44872D priority Critical patent/DE373397C/en
Application granted granted Critical
Publication of DE373397C publication Critical patent/DE373397C/en
Expired 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 -
    • G02B9/12Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only

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

Description

Sphärisch, chromatisch und astigmatisch korrigiertes Objektiv. Die Erfindung bezieht sich auf ein sph.-irisch, chromatisch und astigmati.sch korrigiertes Objektiv, das aus drei durch. Luftzwischenräume getrennten Gliedern besteht, von denen das eine Glied aus zwei Linsen zusammenge.setzt ist.Spherically, chromatically and astigmatically corrected lens. the Invention relates to a spherical-Irish, chromatically and astigmatically corrected Lens that consists of three through. Air spaces separate limbs consists of which one link is composed of two lenses.

Die Erfindung besteht darin, daß die drei Glieder des Objektivs von einer negativen und drei positiven Linsen gebildet werden, von welch letzteren zwei durch eine Kittfläche miteinander vereinigt sind. Die Krümmung der Kittfläche bei .den verkitteten positiven Linsen kann so gewählt «-erden, clal3 ihr Radius annähernd der Schnittweite des achsenparallelen Randstrahles an der Kittfläche gleichkommt, mindestens aber halb so groß ist und mit ihr gleiches Vorzeichen hat.The invention consists in that the three members of the lens of one negative and three positive lenses are formed, of which the latter two are united with one another by a putty surface. The curvature of the putty surface at The cemented positive lens can be chosen so that its radius approximates equals the back focal length of the axially parallel edge ray on the cemented surface, but is at least half the size and has the same sign as it.

Die bisher bekannten, aus vier Linsen bestehenden Objektive weisen zwei positive und zwei negative Linsen auf, von denen stets eine positive und eine negative miteinander verkittet sind. Diese Kombination führt zu einer verhältnismäßig stark gekrümmten .Kittfläche, die, abgesehen von dem Nachteil bei der Herstellung, ungünstig auf die astigmatische Korrektion einwirkt und auch auf die .sphärische insofern, als die achsenparallelen Zonenstrahlen eine starke Ab- weichung ins Negative zeigen.The previously known objectives consisting of four lenses have two positive and two negative lenses, of which one positive and one negative are always cemented to one another. This combination results in a comparatively strongly curved .Kittfläche which, apart from the disadvantage in the production, adversely acts on the astigmatic correction and also to the .sphärische insofar as the paraxial rays deviation zone a strong ex show negative.

Bei dem neuen Objektiv ist dieser Übelstand- dadurch vermieden, daß zwei Sammellinsen miteinander verkittet sind. Es wird auf diese Weise ermöglicht, den Kittflächenrad'ius so .groß zu wählen, daß sein Wert annähernd der Schnittweite des achsenparallelen Randstrahles entspricht. Infolgedessen wird: die astigmatische Differenz nahezu aufgehoben und die Abweichung in der spbäriscben Zone wesentlich verringert, wodurch eine ganz besonders feine sphärische und astigmatische Korrektion erreicht wird.With the new lens this drawback is avoided by the fact that two converging lenses are cemented together. In this way it is made possible to choose the radius of the putty surface so large that its value approximates the back focal length of the axially parallel marginal ray corresponds. As a result it becomes: the astigmatic The difference is almost eliminated and the deviation in the spherical zone is substantial reduced, resulting in a particularly fine spherical and astigmatic correction is achieved.

Im nachfolgenden ist ein Ausführungsbeispiel der Erfindung angegeben, das so gewählt ist, daß die beiden verkitteten Linsen hinter der Blende liegen. Dabei ist das durch die Zeichnung erläuterte Objektiv für f - Ioo berechnet, wobei r den. Radius, d die Linsendicke und c den Luftabstand bedeuten. Das Öffnungsverhältnis ist I :-1,5, die Blende befindet sieh, in dem Luftraum e, zwischen der negativen und, der verkitteten Linse. 42,64 d, = 3,11 L I nD = 4570 v = 55,8 y2 = .__. 293,4 r3 _ 3032 ei - 9,o r4 + 47,43 d2 - 0'85 L II nD = =,6o3 v = 38,I e2 - 6,14 r'' - + 319'83 d3 ="- 1,54 L III nD = 1,540 v = 51,2 re --- - 118,12 L IV nD -- 1,587 v = 60,9 y., _ - 26,47 da == 2,69 Die Ausführung des neuen Objektivs kann so gewählt werden, daß entweder -das dein Objektiv zugekehrte oder das abgekehrte Glied (oder auch beide) aus zwei verkitteten Sammellinsen besteht.In the following an embodiment of the invention is given, which is chosen so that the two cemented lenses are behind the diaphragm. The objective explained by the drawing is calculated for f - Ioo, where r den. Radius, d is the lens thickness and c is the air gap. The focal ratio is I : -1.5, the diaphragm is located in the air space e, between the negative and the cemented lens. 42.64 d, = 3.11 LI nD = 4570 v = 55.8 y2 = .__. 293.4 r3 _ 3032 ei - 9, o r4 + 47.43 d2 - 0'85 L II nD = =, 6o3 v = 38, I e2 - 6.14 r '' - 319'83 + d3 = "- 1.54 L III nD = 1, 54 0 v = 51.2 re --- - 118.12 L IV nD - 1 , 587 v = 6 0 , 9 y., _ - 26.47 da == 2.69 The design of the new lens can be chosen so that either the lens facing or facing away (or both) consists of two cemented converging lenses.

Claims (2)

PATEXT-AITSPRÜCIIE: i. Sphärisch, chromatisch und astigmatisch korrigiertes Objektiv, bestehend aus drei durch Luftzwischenräume vone.inand'er getrennten Gliedern, von denen das eine von zwei verkitteten Linsen gebildet wird, dadurch gekennzeichnet, da& das Objektiv aus einer negativen und drei positiven Linsen zusammengesetzt ist, von welch, letzteren zwei miteinander verkittet sind. PATEXT-AITSPRÜCIIE: i. Spherically, chromatically and astigmatically corrected Objective, consisting of three members separated by air gaps, one of which is formed by two cemented lenses, characterized in that because the lens is composed of one negative and three positive lenses is of which the latter two are cemented together. 2. Objektiv nach Anspruch I, dadurch gekennzeichnet, d'aß der Radius der Kittfläche bei den zusammengesetzten Linsen annähernd ebenso groß, mindestens aber halb so groß ist wie die Schnittweite des achsenparallelenRandstrahles an der Kittfläche und mit ihr ,gleiches Vorzeichen hat.2. Lens according to claim I, characterized by the fact that the radius of the cemented surface is the compound Lenses are approximately the same size, but at least half the size of the back focal length of the axially parallel edge ray on the cemented surface and with it, the same sign Has.
DEP44872D Spherically, chromatically and astigmatically corrected lens Expired DE373397C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP44872D DE373397C (en) Spherically, chromatically and astigmatically corrected lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP44872D DE373397C (en) Spherically, chromatically and astigmatically corrected lens

Publications (1)

Publication Number Publication Date
DE373397C true DE373397C (en) 1923-04-12

Family

ID=7380635

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP44872D Expired DE373397C (en) Spherically, chromatically and astigmatically corrected lens

Country Status (1)

Country Link
DE (1) DE373397C (en)

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