DE1282312B

DE1282312B - Photographic telephoto lens

Info

Publication number: DE1282312B
Application number: DEZ9801A
Authority: DE
Original assignee: Carl Zeiss SMT GmbH
Current assignee: Carl Zeiss SMT GmbH
Priority date: 1962-12-06
Filing date: 1962-12-06
Publication date: 1968-11-07

Description

Photographisches Teleobjektiv Die Erfindung betrifft photographische Teleobjektive, die aus einer vorderen sammelnden Linsengruppe und einer von dieser durch Luftraum getrennten hinteren zerstreuenden Linsengruppe zusammengesetzt sind, wobei diese beiden Linsengruppen je aus zwei luftraumgetrennten Einzellinsen von entgegengesetzter Brechkraft bestehen derart, daß diese Objektive aus vier luftraumgetrennten Einzellinsen bestehen, und zwar einer sammelnden unsymmetrischen bikonvexen ersten Linse, welche die Fläche der absolut stärkeren Krümmung dem Aufnahmegegenstand zukehrt, einer zerstreuenden unsymmetrischen bikonkaven zweiten Linse, welche die Fläche der absolut stärkeren Krümmung der ersten Linse zukehrt, einer sammelnden unsymmetrischen dritten Linse, welche die Fläche der absolut stärkeren Krümmung der zweiten Linse zukehrt. und einer zerstreuenden meniskenförmigen vierten Linse, welche die hohle Fläche der dritten Linse zukehrt. wobei zwischen der Brechzahl n, des Glases der ersten Linse und der Brechzahl n" des Glases der zweiten Linse die Beziehung 1,45 < n, < 1,70 < n" < 1,95 und zwischen der Abbeschen Zahl r, des Glases der ersten Linse und der Abbeschen Zahl j"" des Glases der zweiten Linse die Beziehung 20 < @." < 35 < ", < 70 besteht. Der Erfindung liegt die Aufgabe zugrunde. für das Kleinbildformat ein derartiges vierlinsiges Objektiv der Brennweite _/ = 135 mm zu entwickeln. welches in einen handelsüblichen Verschluß eingebaut werden kann. bei dem die Verschlußlamellen vorzugsweise im Bildraum hinter dem Objektiv liegen.Telephotographic Lens This invention relates to photographic ones Telephoto lenses consisting of a front group of converging lenses and one of these are composed of rear diffusing lens groups separated by air space, These two lens groups each consist of two airspace-separated single lenses from opposing refractive power exist such that these lenses consist of four airspace-separated Individual lenses exist, namely a converging asymmetrical biconvex first Lens, which faces the surface of the absolutely stronger curvature towards the subject, a diffusing unsymmetrical biconcave second lens covering the surface turns towards the absolutely stronger curvature of the first lens, a converging asymmetrical one third lens, which is the area of the absolutely greater curvature of the second lens turns to. and a diffusing meniscus fourth lens which defines the hollow Face facing the third lens. where between the refractive index n, of the glass the first lens and the refractive index n "of the glass of the second lens has the relationship 1.45 <n, <1.70 <n "<1.95 and between the Abbe number r, of the glass of the first lens and the Abbe's number j "" of the glass of the second lens has the relationship 20 <@. "<35 <", <70 exists. The invention is based on the object. such a four-lens lens with a focal length of _ / = for the 35 mm format 135 mm to develop. which can be built into a commercially available lock can. in which the shutter blades are preferably in the image space behind the lens lie.

Durch weitere Untersuchungen wurde die weitere Erkenntnis gewonnen, daß sich die erfindungsgemäß vorgeschlagene Bauform auch für andere Zwecke eignet. bei denen man nicht an der Verwendung eines Verschlusses der obenerwähnten Art interessiert ist.Through further investigations the further knowledge was gained, that the design proposed according to the invention is also suitable for other purposes. in which one is not interested in the use of a closure of the type mentioned above is.

Durch umfangreiche Untersuchungen wurde die Erkenntnis gewonnen, daß man ein Objektiv der oben beschriebenen Bauform dem erwähnten Verwendungszweck anpassen und dabei eine besonders gute chromatische Korrektion erzielen kann. wenn man es so aufbaut, daß es die sämtlichen folgenden Merkmale erhält: a) die Summe der Brechkräfte der den ersten Luftraum (dz) begrenzenden Flächen (2 und 3) liegt innerhalb der Grenzen -1,20 - 1/f und -0,65 - 1/f, b) die Summe der Brechkräfte der Flächen (3 und 4) der zweiten Linse liegt innerhalb der Grenzen -2,30- 1/f und -1,50- 1/f; c) die Summe der -Brechkräfte der den zweiten Luftraum begrenzenden Flächen (4 und 5) liegt innerhalb der Grenzen +0,10 - 1/f und +1,20 - l,lf, d) die Summe der Brechkräfte der Flächen (5 und 6) der dritten Linse liegt innerhalb der Grenzen + 1,10 - 1/J' und +2,50-1/f, e) die Summe der Brechkräfte der den dritten Luftraum begrenzenden Flächen (6 und 7) liegt innerhalb der Grenzen -3,20 - 1/f und -1,00 - 1/f, f1 die Summe der Brechkräfte der Flächen (7 und 8) der vierten Linse liegt innerhalb der Grenzen -2,80 - 1/f und - 1,00 - 1/f, wobei unter f die Brennweite des Objektivs verstanden werden soll.Extensive investigations made it possible to realize that a lens of the design described above can be adapted to the stated purpose and thereby achieve particularly good chromatic correction. if it is constructed in such a way that it has all of the following features: a) the sum of the refractive powers of the surfaces (2 and 3) delimiting the first air space (dz) lies within the limits -1.20 - 1 / f and -0, 65 - 1 / f, b) the sum of the refractive powers of the surfaces (3 and 4) of the second lens is within the limits -2.30- 1 / f and -1.50-1 / f; c) the sum of the refractive powers of the surfaces delimiting the second air space (4 and 5) lies within the limits +0.10 - 1 / f and +1.20 - l, lf, d) the sum of the refractive powers of the surfaces (5 and 6) the third lens lies within the limits + 1.10 - 1 / J 'and + 2.50-1 / f, e) the sum of the refractive powers of the surfaces (6 and 7) delimiting the third air space lies within the limits -3.20 - 1 / f and -1.00 - 1 / f, f1 the sum of the refractive powers of the surfaces (7 and 8) of the fourth lens lies within the limits -2.80 - 1 / f and - 1.00 - 1 / f, where f is to be understood as the focal length of the lens.

In den unten angegebenen Tabellen 1 und 11 sind die Fertigungsdaten für zwei gemäß der Erfindung aufgebaute Objektive angegeben. Die Daten sind so normiert, daß sich für die Brennweite der Wert f = 1,00 ergibt. Die Offnung dieser Objektive hat den Wert f :4, sie sind korrigiert für einen Bildwinkel . von ±9".In Tables 1 and 11 below are the manufacturing data indicated for two lenses constructed according to the invention. The data are standardized that the value f = 1.00 results for the focal length. The opening of these lenses has the value f: 4, they are corrected for one angle of view. of ± 9 ".

Es versteht sich von selbst, daß ein Objektiv, dessen Konstruktionsdaten nicht genau mit den angegebenen Daten übereinstimmen, sondern nur in der Nähe dieser Daten liegen, einen etwa gleichen Korrektionszustand aufweisen kann, es empfiehlt sich aber, so dicht bei den angegebenen Daten zu bleiben, daß keine der Brechkräfte dem Betrage nach um mehr als 0,40 - 1/f von dem jeweils angegebenen Werte abweicht. In den unten angegebenen Tabellen III und IV sind die Fertigungsdaten für zwei weitere Objektive gemäß der Erfindung angegeben. Die Offnung dieser Objektive hat den Wert f : 5,6, das Objektiv gemäß der Tabelle III ist korrigiert für einen Bildwinkel von ±9°, das Objektiv gemäß Tabelle IV ist korrigiert für einen Bildwinkel von ±8'. Tabelle I Linsen Radien ' Scheitelabstände nd v 'I n r ri = +0,31702 - f -1-1,6818/f L, dl = 0,13570 f 1,53315 58,08 r2 '-- -1,75784 - f +0,3033/f d2 = 0,05278- f r3 = -0,64l75 - f -1,2547/f Lii 43 = 0,06240 - f 1,80518 25,46 r4 = +i,26205 - f -0,6380/f 44 = 0,23457 f r5 = +0,36613 - f + 1,6476/f Li" d5- = 0,04060 - f 1,60323 42,51 r6 = -1,12488 - f +0,5363/f d6 = 0,i2668 - f r7 = -0,22444 - f -2,7394/f Liv d7 = 0,02519 - f 1,61484 51,11 r8 = -2,66762 - f +0,2305/f sö = 0,3050 - f Tabelle II Linsen Radien Scheitelabstände nä v A n r r, = +0,34791 - f +1,7458/f Li dl = 0,14162 - f 1,60738 56,66 r2 = -1,75665 - f +0,3458/f d2 = 0,05860 f r3 = -0,64637 - f -1,2457/f L" 43 = 0,03757 - f 1,80518 25,46 r4 = +1,01645 - f -0,7921/f d4 = 0,28550 - f r5 = +0,37116 - f + 1,5285/f L", d5 = 0,02254 f 1,56732 42,82 r6 = =0,97340 - f +0,5828/f d6 = 0,12998 f r7 = -0,24279 - f' -2,5631/f Liv d, = 0,01127 f 1,62230 53,14 r8 = -2,99110 - f +0,2081/f sö = 0,2908 - f Tabelle III Linsen Radien Scheitelabstände nd v 4 n r ri = -1-0,33704 @ f +1,8021/f L, di = 0,09041 f 1,60738 56,66 r2 = -1,86821 - f +0,3251/f d2 = 0,07126 f r3 = -0,64403 - f -1,2502/f Lit d3 = 0,02746 f 1,80518 25,46 r4 = + 1,08127 - f -0,7447/f Fortsetzung Linsen Radien Scheitelabstände nd v 1 n r 44 = 0,28031 -.f +1,186?/f r5 = +0,48997 f L", d5 = 0,01778 f 1,58144 40,80 r, = -0,89679 f +0,6484/f d£, = 0,12910-f r7 = -0,25456 @ f -2,4466/f L,v d, = 0,01382-f 1,62280 56,88 r$ = -1,08l27 - f +0,5760/f sö = 0,32818 - f; Baulänge = 0,95832. Tabelle IV Linsen Radien Scheitelabstände nd v :1 n r r, = +0,34791 - f +1,7458/f L, dt = 0,14162 f 1,60738 56,66 r2 = -1,75665 @ f +0,3458/f d2 = 0,05860 f r3 = -0,64637 - f -1,2457/f G" r4 = + 1,01645 d3 = 0,03757 - f 1,80518 25,46 -0,7921/f , .f d4 = 0,28550 f r5 = +0,37116 - f' + 1,5285/f G", r, _ -0,97340 # f d5 = 0,02254 f 1,56732 42,82 +0,5828/f d6 = 0,12998 - f r7 = -0,24279 -.f -2,5631/f L,v d., = 0,01127 @ f 1,62230 53,14 r@ _ -2,99I 10 @ f +0,2081/f sQ = 0,2908 - f; Baulänge = 0,97780 - f. In den Zeichnungen F i g. 1, 2, 3, 4 sind die Linsenschnitte der Objektive gemäß den Tabellen I, 1I, III und IV dargestellt.It goes without saying that a lens whose design data do not exactly match the specified data, but are only in the vicinity of these data, can have approximately the same state of correction, but it is advisable to stick to the specified data as closely as possible, that none of the refractive powers the amount deviates by more than 0.40 - 1 / f from the respective stated values. In Tables III and IV given below, the production data for two further objectives according to the invention are given. The aperture of these objectives has the value f: 5.6, the objective according to Table III is corrected for an image angle of ± 9 °, the objective according to Table IV is corrected for an image angle of ± 8 '. Table I. Lens radii 'vertex distances nd v ' I n r ri = +0.31702 - f -1-1.6818 / f L, dl = 0, 1 f 1.53315 3570 58.08 r2 '- -1.75784 - f + 0.3033 / f d2 = 0.05278- f r3 = -0.64l75 - f -1.2547 / f Lii 4 3 = 0.06240 - f 1.80518 25.46 r4 = + i, 26205 - f -0.6380 / f 44 = 0.23457 f r5 = +0.36613 - f + 1.6476 / f Li "d5- = 0.04060 - f 1.60323 42.51 r6 = -1.12488 - f + 0.5363 / f d6 = 0, i2668 - f r7 = -0.22444 - f -2.7394 / f Liv d7 = 0.02519 - f 1.61484 51.11 r8 = -2.66762 - f + 0.2305 / f sö = 0.3050 - f Table II Lens radii vertex distances n v A n r r, = +0.34791 - f + 1.7458 / f Li dl = 0.14162 - f 1.60738 56.66 r2 = -1.75665 - f + 0.3458 / f d2 = 0.05860 f r3 = -0.64637 - f -1.2457 / f L " 4 3 = 0.03757 - f 1.80518 25.46 r4 = +1.01645 - f -0.7921 / f d4 = 0.28550 - f r5 = +0.37116 - f + 1.5285 / f L ", d5 = 0.02254 f 1.56732 42.82 r6 = = 0.97340 - f + 0.5828 / f d6 = 0.12998 f r 7 = -0.24279 - f ' -2.5631 / f Liv d, = 0.01127 f 1.62230 53.14 r8 = -2.99110 - f + 0.2081 / f sö = 0.2908 - f Table III Lens radii vertex distances nd v 4 n r ri = -1-0.33704 @ f + 1.8021 / f L, di = 0.09041 f 1.60738 56.66 r2 = -1.86821 - f + 0.3251 / f d2 = 0.07126 f r3 = -0.64403 - f -1.2502 / f Lit d3 = 0.02746 f 1.80518 25.46 r4 = + 1.08127 - f -0.7447 / f continuation Lens radii vertex distances nd v 1 n r 4 4 = 0.28031 -.f +1,186? / F r5 = +0.48997 f L ", d5 = 0.01778 f 1.58144 40.80 r, = -0.89679 f + 0.6484 / f d £, = 0.12910-f r7 = -0.25456 @ f -2.4466 / f L, vd, = 0.01382-f 1.62280 56.88 r $ = -1.08l27 - f + 0.5760 / f sö = 0.32818 - f; Overall length = 0.95832. Table IV Lens radii vertex distances nd v : 1 n r r, = +0.34791 - f + 1.7458 / f L, dt = 0.14162 f 1, 60738 56.66 r2 = -1.75665 @ f + 0.3458 / f d2 = 0.05860 f r3 = -0.64637 - f -1.2457 / f G " r4 = + 1.01645 d3 = 0.03757 - f 1.80518 25.46 -0.7921 / f , .f d4 = 0.28550 f r5 = +0.37116 - f '+ 1.5285 / f G ", r, _ -0.97340 # f d5 = 0.02254 f 1.56732 42.82 + 0.5828 / f d6 = 0.12998 - f r7 = -0.24279 -.f -2.5631 / f L, v d., = 0.01127 @ f 1.62230 53.14 r @ _ -2.99I 10 @ f + 0.2081 / f sQ = 0.2908 - f; Overall length = 0.97780 - f. In the drawings F i g. 1, 2, 3, 4 the lens sections of the objectives according to Tables I, 1I, III and IV are shown.

Claims

Claims: I. Photographic telephoto lens, consisting of four airspace-separated individual lenses, namely a collecting asymmetrical biconvex first lens, which faces the surface of the absolutely stronger curvature of the subject, a dispersing asymmetrical biconcave second lens, which the surface of the absolutely stronger curvature of the first lens facing, a converging asymmetrical third lens, which faces the surface of the absolutely stronger curvature of the second lens, and a dispersing meniscus-shaped fourth lens, which faces the hollow surface of the third lens, with between the refractive index n, of the glass of the first lens and the The refractive index n "of the glass of the second lens has the relationship 1.45 <n, <1.70 <n"<1.95 and between the Abbe number v of the glass of the first lens and the Abbe number v "of the glass of the second lens -the relationship 20 <v "<35 <v, <70 exists, characterized by the combination of the following features: a) the sum of the refractive powers of the surfaces (2 and 3) delimiting the first air space (d2) lies within the limits - 1.20 - 1 / f and -0.65 - I / f, b) the sum of the refractive powers of the surfaces (3 and 4) of the second lens lies within the limits -2.30 - I / f and -1.50 - 1 / f, c) the sum of the refractive powers of the surfaces (4 and 5) delimiting the second air space lies within the Limits +0.10 - 1 / f and +1.20 - I / f, d) the sum of the refractive powers of the surfaces (5 and 6) of the third lens is within the limits +1.10 - Il f and +2, 50 - 1 / f, e) the sum of the refractive powers of the surfaces (6 and 7) delimiting the third air space lies within the limits -3.20 - 1 / f and -1.00 - 1 / f, f) the sum of the Refractive powers of the surfaces (7 and 8) of the fourth lens are within the limits -2.80 - I / f and - 1.00 - I / f, where f is to be understood as the focal length of the lens.

2, objective according to claim 1, characterized in that its construction data are so close to the values given in the following table that none of the refractive powers the amount deviates by more than 0.40 - 1 / f from the specified values: Table I. Lens radii vertex distances nd n r 1.6818 / f +0.31702 yf L, dt = 0.13570-f 1.53315 58.08 r2 = -1.75784 - f + 0.3033 / f r3 = - 0.64175 # f d2 = 0.05278 - f -1.2547 / f L " d3 = 0.06240 -.f 1.80518 25.46 r4 = + 1.26205 @ .f -0.6380 / f d4 = 0.23457 f r5 = +0.36613 -.f ' + 1.6476 / f L ", d5 = 0.04060 - f 1.60323 42.51 r ,, _ -1, l2488 @, f + 0.5363 / f d ,, = 0.12668 f r, = -0.22444 -, f -2.7394 / f L, vd, = 0.02519 -.f * 1.61484 51.11 rs = -2.66762 @, / '+ 0.2305 / f s @ = 0.3050 - f

3. Photographic lens according to claim 1, characterized in that its design data are so close to the values given in the following table that none of the refractive powers the amount deviates from the specified values by more than 0.40 - 1 f Table 11 ' Lens radii vertex distances - nd r + 1,7458.f ' L, r, _ +0.3479 1 _f d, = 0.14I62 f 1.60738 56.66 r2 = - 1, 75665 f +0.3458 .f d2 = 0.05860 r3 = -0.64637 f -1.2457 f LIA d3 = 0.03757 -.f 1.80518 25.46 r4 = + 1.01645 _f -0.7921 .f 44 = 0.28550 @ .1 @ r5 = + 0.37l16 - f + 1.5285f Lii, d5 = 0.02254, f 1, 56732 42.82 r @ _ -0.97340 _f +0.5828 , f d ,, = 0.12998 r "= -0.24279 .f - 2.5631 f L iv d-. = 0.01127 f '1 .62230 53.14 rs = - 2.99110 + 0.2081 f s @ = 0.2908 -.f

4. A photographic lens according to claim 1, characterized in that its design data are so close to the values given in the following table that none of the refractive powers are by more than 0.40 - 1 / f deviates from the specified values: Table 111 Lens radii vertex distances n ",, tn r rt = +0.33704 - f + 1.8021 / f L, dl = 0.09041 f 1.60738 56.66 r2 = -1.86821 - f + 0.3251 / f d2 = 0.07126 f r3 = -0.64403 - f -1.2502 / f L " d3 = 0.02746 f 1.80518 25.46 r4 = + 1.08127 'f -0.7447 / f d4 = 0.28031 - f r 5 = +0.48997 - f + 1.1867 / f L ", d5 = 0.01778 f 1.58144 40.80 r6 = -0.89679 - f + 0.6484 / f d6 = 0.12910 f r, = -0.25456 - f -2.4466 / f L, v d7 = 0.01382 f 1.62280 56.88 r8 = -1.08127 -.f + 0.5760 / f sö = 0.32818 - f

5. A photographic lens according to claim 1, characterized in that its design data are so close to the values given in the following table that none of the refractive powers the amount deviates by more than 0.40 - 1 / f from the respective stated values Table IV Lens radii vertex distances n ", -In r r1 = +0.34791 - f + 1.7458 / f L, dl = 0.14162 f 1.60738 56.66 r2 = - 1 75 665 - f + 0.3458 / f d2 = 0.05860_ f r3 = -0.64637 - f -1.2457 / f Lt, d3 = 0.03757 f 1.80518 25.46 r4 = + 1.1645 - f -0.7921 / f 44 = 0.28550 f rs = +0.37116 - f + 1.5285 / f L ", ds = 0.02254 f 1.56732 42.82 r6 = -0.97340 - f + 0.5828 / f d6 = 0.12998 f r7 = -0.24279 - f -2.5631 / f L, v d., = 0.01127 f 1.62230 53.14 r8 = -2.99l10 # f + 0.2081 / f s 0 ' = 0.2908 - f

Considered publications: German Patent Nos. 932 162, 973 019, 1 051528, 1096 057; German interpretative document No. 1086 911; British Patent No. 836 087.