DE235575C - - Google Patents
Info
- Publication number
- DE235575C DE235575C DENDAT235575D DE235575DA DE235575C DE 235575 C DE235575 C DE 235575C DE NDAT235575 D DENDAT235575 D DE NDAT235575D DE 235575D A DE235575D A DE 235575DA DE 235575 C DE235575 C DE 235575C
- Authority
- DE
- Germany
- Prior art keywords
- lens
- eyepiece
- cemented
- difference
- cemented surface
- 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.)
- Active
Links
- 201000009310 astigmatism Diseases 0.000 description 5
- 239000011521 glass Substances 0.000 description 3
- 241000031711 Cytophagaceae Species 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
- JKi 235575■-KLASSE 42 h. GRUPPE- JKi 235575 ■ CLASS 42 h. GROUP
Firma CARL ZEISS in JENA.CARL ZEISS company in JENA.
Holländisches Fernrohr. Patentiert im Deutschen Reiche vom 29. April 1910 ab.Dutch telescope. Patented in the German Empire on April 29, 1910.
Die Erfindung betrifft solche Linsensysteme holländischer Fernrohre, die aus einem verkitteten Objektiv und einem verkitteten Okular bestehen und ein großes Gesichtsfeld besitzen. Systeme dieser Art sind bisher stets mit starken Zonen des Astigmatismus der schiefen Büschel behaftet gewesen. Dieser Mangel läßt sich nach vorliegender Erfindung in allen Fällen beseitigen, wo die KittflächenwirkungThe invention relates to such lens systems of Dutch telescopes, which consist of a cemented Lens and a cemented eyepiece and have a large field of view. Systems of this kind have always been leaning with strong zones of astigmatism Tufts were afflicted. This deficiency can be found in all of the present invention Eliminate cases where the putty surface effect
ίο im Objektiv zerstreuend, im Okular sammelnd ist und der größte an einer Kittfläche vorkommende Brechungsexponentenunterschied sich im Objektiv findet. In diesen Fällen ist bisher das Okular ein achromatisiertes System gewesen. Für den Erfindungszweck ist es im Gegenteil erforderlich, die verkitteten Okularlinsen aus solchen Glasarten herzustellen, die keinen erheblichen Unterschied des Zerstreuungsvermögens zeigen, Achromatisierung des Oku- lars also gar nicht zulassen. Dies dürfte der Fall sein, wenn der Unterschied der ν Werte noch nicht fünf Einheiten beträgt. Schon mit einer einzigen Kittfläche im Okular kann man die Zone des Astigmatismus der schiefen Bü-ίο is diffusing in the lens, collecting in the eyepiece and the largest difference in refraction exponents occurring on a cemented surface is found in the lens. In these cases the eyepiece has hitherto been an achromatized system. For the purpose of the invention, on the contrary, it is necessary to manufacture the cemented ocular lenses from such types of glass that do not show any significant difference in the dispersive power, that is, do not allow achromatization of the ocular at all. This should be the case if the difference in the ν values is not yet five units. Already with a single putty surface in the eyepiece, one can identify the zone of astigmatism of the oblique pictures.
schel korrigieren, in vollkommener Weise dann, wenn man der Kittfläche eine stärkere Krümmung gibt als jeder der beiden Außenflächen. Correct schel, in a perfect way, if you give the putty a stronger one There is curvature as each of the two outer surfaces.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt, bei dem jedes der beiden Glieder nur eine Kittfläche hat. Die Vergrößerung ist eine vierfache und das augenseitige Gesichtsfeld beträgt 16 °. Der Achsenabschnitt b zwischen beiden Gliedern ist 62,2 mm lang, derjenige I zwischen der hintersten Linsenfläche und dem Kreuzungspunkt 0 der Hauptstrahlen (Augendrehpunkt) 25 mm. Die folgende Zusammenstellung enthält außer den Abmessungen der Linsen und den Glasarten auch Angaben über die Zonen des Astigmatismus. Der Astigmatismus ist dargestellt durch die in dptr angegebenen Reziproken der Schnittweiten /' und t der sagittalen und meridionalen Büschel, die der Hauptstrahlen von verschiedener augenseitiger Neigung w' (darunter der Achsenstrahl und der Randstrahl) zugehören.In the drawing, an embodiment of the invention is shown in which each of the two members has only one cemented surface. The magnification is four times and the field of view on the eye side is 16 °. The axis segment b between the two members is 62.2 mm long, the one I between the rearmost lens surface and the intersection point 0 of the main rays (center of rotation of the eye) 25 mm. In addition to the dimensions of the lenses and the types of glass, the following list also contains information on the zones of astigmatism. The astigmatism is represented by the reciprocal of the back focal length / 'and t of the sagittal and meridional tufts, given in dptr, which belong to the main rays of different inclination w' (including the axial ray and the marginal ray).
6060
Abmessungen der Linsen in Millimetern:Dimensions of the lenses in millimeters:
rx = 60,0
r2 ==. 42,9
rs = 319,9 r x = 60.0
r 2 ==. 42.9
r s = 319.9
U = 15,6 U = 15.6
h = 4,5 h = 4.5
di = 18,2 d„ = i,o
dni = 2>5
djv = 0,5 di = 18.2 d " = i, o d ni = 2 > 5
djv = 0.5
Glasarten:Glass types:
η di — 1,5726 =■- ifizAS • = i,5726 naiv= 1,5600 η di - 1.5726 = ■ - ifizAS • = i, 5726 naive = 1.5600
= 57,5= 57.5
= 57-5 70 = 57-5 70
'IV'IV
Korrektion des Astigmatismus:Correction of astigmatism:
w' = w ' =
I _ I _
■—- = ο,οο■ —- = ο, οο
0,00 ■
0,00 dptr0.00 ■
0.00 dptr
5,65° o,i8 dptr5.65 ° o, 18 dptr
—0,18 8,oo°
•— 0,6 dptr-0.18 8.00 °
• - 0.6 dptr
+ 4.0+ 4.0
Claims (2)
Publications (1)
Publication Number | Publication Date |
---|---|
DE235575C true DE235575C (en) |
Family
ID=495335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT235575D Active DE235575C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE235575C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1113835B (en) * | 1959-12-23 | 1961-09-14 | Hensoldt & Soehne Optik | Four-lens afocal attachment system for extending the focal length of a downstream lens |
JPS5221840A (en) * | 1975-08-12 | 1977-02-18 | Goto Kogaku Kenkyusho:Kk | Optical system using a correction lens in a refraction telescope |
-
0
- DE DENDAT235575D patent/DE235575C/de active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1113835B (en) * | 1959-12-23 | 1961-09-14 | Hensoldt & Soehne Optik | Four-lens afocal attachment system for extending the focal length of a downstream lens |
JPS5221840A (en) * | 1975-08-12 | 1977-02-18 | Goto Kogaku Kenkyusho:Kk | Optical system using a correction lens in a refraction telescope |
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