DE2430926C3

DE2430926C3 - Bright wide-angle lens

Info

Publication number: DE2430926C3
Application number: DE19742430926
Authority: DE
Inventors: Yasuo; Ogawa Ryota; Tokio Takahashi
Original assignee: Asahi Kogaku Kogyo Co Ltd
Current assignee: Pentax Corp
Priority date: 1973-07-02
Filing date: 1974-06-27
Publication date: 1976-12-09

Description

F/0,95<|F₁._M|<F/0,6; F₁.,.,F / 0.95 <| F ₁ . _M | <F / 0.6; F ₁ .,.,

1^1.2.3-4.5 I > ™,25,1 ^ 1.2.3-4.5 I. > ™, 25,

l<r_u/r_u<l,5,
0,4>n₇-n₈>0,l, l <r _u / r _u <l, 5,
0.4> n ₇ -n ₈ > 0.1 l,

50 <50 <

<70.<70.

Hierbei bedeutetHere means

F — Brennweite des gesamten Systems,
i.f-t -- gesamte Brennweite der Linsen 1 bis i, π,- = Brechungsindex bezüglich der d-Linie derF - focal length of the entire system,
if-t - total focal length of lenses 1 to i, π, - = refractive index with respect to the d-line of the

i-ten Linse,i-th lens,

ν,- = die Abbe-Zahl der i-ten Linse,ν, - = the Abbe number of the i-th lens,

dj = Dicke bzw. Oberflächenabstand der /-ten dj = thickness or surface distance of the / th

Linse und
20 Lens and
20th

r_k = Krümmungsradius der it-ten Linse. r _k = radius of curvature of the it-th lens.

In den Zeichnungen sind Schnittbilder der erfindungsgemäßen Objektive sowie deren Korrekturzustände dargestellt. Es zeigtThe drawings show sectional images of the objectives according to the invention and their correction states shown. It shows

F i g. 1 schematisch einen Schnitt durch das Objektiv gemäß Anspruch 1,F i g. 1 schematically a section through the objective according to claim 1,

F i g. 2 eine Darstellung der verschiedenen Bildfehlerkurven des Objektivs gemäß F i g. 1,F i g. FIG. 2 shows the various image aberration curves of the lens according to FIG. 1,

F i g. 3 einen Schnitt durch das Objektiv nach Anspruch 2 undF i g. 3 a section through the objective according to claim 2 and

F i g. 4 eine Darstellung der Bildfehlerkurven des Objektivs der Fig. 3.F i g. 4 shows an illustration of the aberration curves of the objective of FIG. 3.

Wie die F i g. 1 und 3 erkennen lassen, stimmen die erfindungsgemäßen Objektive in ihrem prinzipiellen Aufbau überein. Die erste Linse ist dabei eine sammelnde Linse, deren Oberfläche mit dem kleineren Krümmungsradius zum Objekt weist. Die zweite und dritte Linse sind zerstreuende Meniskuslinsen, deren Oberflächen mit dem kleineren Krümmungsradius zum Bild weisen. Hinter der zweiten und dritten Linse ist bei dem Objektiv gemäß der F i g. 1 ein Filter angeordnet, welches bei der Ermittlung der Linsenzahl nicht berücksichtigt wird. Die vierte Linse ist eine zerstreuende Meniskuslinse, deren Oberfläche mit dem kleineren Krümmungsradius mit der fünften, konvexen Linse zur Bildung eines Kittgliedes verkittet ist. Die sechste, ebenfalls sammelnde Linse ist im Abstand von der fünften Linse angeordnet. Zwischen diesen Linsen kann die Blende vorgesehen sein. Die siebte, zerstreuende Linse und die achte, sammelnde Linse sind ebenfalls miteinander verkittet und haben insgesamt negative Brechkraft. Die neunte Linse ist eine sammelnde Meniskuslinse, deren Oberfläche mit <fem kleineren Krümmungsradius zum Bild weist. Die zehnte Linse ist schließlich eine sammelnde Linse. Die beiden Objektive erfüllen die eingangs erwähnten Bedingungen (1) bis (5).As the F i g. 1 and 3 can be seen, the objectives of the invention are correct in their principle Structure. The first lens is a collecting lens, its surface with the smaller one Radius of curvature points to the object. The second and third lenses are negative meniscus lenses, whose surfaces with the smaller radius of curvature face the image. Behind the second and third lens is in the lens according to FIG. 1 arranged a filter, which in the determination the number of lenses is not taken into account. The fourth lens is a negative meniscus lens, whose Surface with the smaller radius of curvature with the fifth, convex lens to form a cemented link is cemented. The sixth, also collecting lens is arranged at a distance from the fifth lens. The diaphragm can be provided between these lenses. The seventh, diffusing lens and the eighth, convergent lenses are also cemented together and have an overall negative refractive power. The ninth lens is a collecting meniscus lens, the surface of which has a smaller radius of curvature points to the picture. Finally, the tenth lens is a positive lens. The two lenses meet the aforementioned conditions (1) to (5).

Bei dem Objektiv gemäß F i g. 1 sind die Konstruktionsdaten gemäß der im Kennzeichen des Anspruches 1 enthaltenen Datentabelle vorgesehen. Die Seidel-Koeffizienten dieses Objektivs ergeben sich aus der Tabelle 1.In the case of the lens according to FIG. 1 are the design data according to the characterizing part of the claim 1 included data table is provided. The Seidel coefficients of this lens result from of table 1.

Bei dem Objektiv der F i g. 3 sind die Konstruktionsdaten gemäß der Datentabelle aus dem Kennzeichen des Anspruchs 2 vorgesehen. Es ergeben sich die Seidel-Koeffizienten nach Tabelle 2.In the lens of FIG. 3 are the design data according to the data table from the label of claim 2 provided. The Seidel coefficients result from Table 2.

«■Μ«■ Μ

Table 1

Oberflächesurface

IIIIII

11 0,0070.007 0,0130.013 0,0250.025 0,1200.120 0,2790.279 22 0,0000.000 -0,002-0.002 0,0660.066 -0,041-0.041 -0,857-0.857 33 0,0020.002 0,0050.005 0,0110.011 0,2130.213 0,4780.478 44th -0,843-0.843 0,1860.186 -0,041-0.041 -0,498-0.498 0,1190.119 55 0,1970.197 0,1190.119 0,0720.072 0,1610.161 0,1410.141 66th -3,896-3.896 0,5140.514 -0,068-0.068 -0,461-0.461 0,0700.070 0,4530.453 0,2570.257 0,1450.145 0,0000.000 - 0,082- 0.082 Filterfilter -0,466-0.466 -0,264-0.264 -0,150-0.150 0,0000.000 -0,085-0.085 77th 2,0122.012 0,5060.506 0,1270.127 0,1560.156 0,0710.071 88th -0,270-0.270 0,0180.018 -0,001-0.001 -0,004-0.004 0,0000.000 99 0,0260.026 -0,035-0.035 0,0480.048 0,1230.123 -0,231-0.231 1010 0,0150.015 0,0290.029 0,0570.057 0,0530.053 0,2150.215 1111th 17,52717,527 -1,434-1.434 0,1170.117 0,3920.392 -0,042-0.042 1212th -21,535-21,535 0,9240.924 -0,040-0.040 -0,548-0.548 0,0250.025 1313th -0,680-0.680 -0,367-0.367 -0,199-0.199 -0,052-0.052 -0,135-0.135 1414th -1,600-1,600 -1,033-1.033 -0,667-0.667 -0,096-0.096 -0,493-0.493 1515th 0,1100.110 0,1790.179 0,2910.291 -0,083-0.083 0,3370.337 1616 1,7321.732 -0,099-0.099 0,0060.006 0,3250.325 -0,019-0.019 1717th 0,0590.059 0,0870.087 0,1280.128 0,0730.073 0,2970.297 1818th 8,2008,200 0,5790.579 0,0410.041 0,2690.269 0,0220.022 Summetotal 1,0481.048 0,1800.180 -0,030-0.030 0,1000.100 0,2750.275

Table 2

Nummer der I Linsen-Oberfläche Number of the I lens surface

IIII

ΠΙΠΙ

11 0,0080.008 0,0140.014 0,0250.025 0,1240.124 0,2690.269 22 0,0000.000 -0,001-0.001 0,0620.062 -0,045-0.045 -0,847-0.847 33 0,0040.004 0,0070.007 0,0130.013 0,2280.228 0,4460.446 44th -0,894-0.894 0,2160.216 -0,052-0.052 -0,516-0.516 0,1370.137 55 0,2030.203 0,1200.120 0,0700.070 0,1650.165 0,1380.138 66th -3,892-3,892 0,5210.521 -0,070-0.070 . -0,464. -0.464 0,0710.071 77th 1,9781,978 0,4960.496 0,1240.124 0,1570.157 0,0710.071 88th -0,104-0.104 0,0040.004 -0,000-0.000 -0,002-0.002 0,0000.000 99 0,0210.021 -0,031-0.031 0,0450.045 0,1200.120 -0,237-0.237 1010 0,0150.015 0,0290.029 0,0580.058 0,0530.053 0,2170.217 1111th 16,88216.882 1,4861.486 0,1310.131 0,3960.396 -0,046-0.046 1212th -20,460-20.460 1,0541.054 -0,520-0.520 -0,546-0.546 0,0300.030 1313th -0,556-0.556 -0,317-0.317 -0,180-0.180 -0,049-0.049 -0,130-0.130 1414th -1,682-1.682 -1.07G-1.07G -0,680-0.680 -0,107-0.107 -0,500-0,500 1515th 0,1120.112 0,1860.186 0,3060.306 -0,089-0.089 0,3590.359 1616 1,3141,314 0,1250.125 0,0120.012 0,3230.323 -0,032-0.032 1717th 0,0600.060 0,0890.089 0,1310.131 0,0750.075 0,3040.304 1818th 8,0018.001 0,5200.520 0,0340.034 0,2710.271 0,0200.020 Summetotal 1,0111.011 0,2040.204 -0,024-0.024 0,0950.095 0,2710.271

Hierzu 2 Blatt ZeichnungenFor this purpose 2 sheets of drawings

Claims

Patent claims:

1. Bright, consisting of ten lenses grouped into eight lens elements Super wide-angle lens with minimal aberration, at least its rear sectional width 1.6F, characterized in that the following design data is available:

F = 100; 1: 2.4; Angle of view 2 ω = 95.20 °

^ri ^r i = 326.282 = 276.609 UU = 949.626 60.873 r'_s r ' _s = 207.067 = -349.170 r ₄ = 88.291 = 740.533 ^rs ^r s = 230.832 = -100.524 = 80.421 = -81.327 Filter thickness 7.30 = 228.884 _rr = 340.745 r_s r _s = -409.070 r₉ r ₉ = -104.702 r₁₀ r ₁₀ = 598.995 ^ru ^r u = -162.162 = -120.409 r₁₃ r ₁₃ 1.2.3.4.5= -1589,8251.2.3.4.5 = -1589.825 ^ru ^r u r _ie ^rn ^r n 'Ίβ'Ίβ 1.2.3

= 40.61 η =η = 1.64000 νν = 60.2 = 0.49 = 9.98 η =η = 1.78590 νν = 44.2 = 38.62 =■· 5,99= ■ * 5.99 η =η = 1.58913 VV = 61.1

d, = 50.89

= 11.59 = 78.01 = 20.89 = 39.45 = 10.47 4.97 7.50 9.88 is = 21.91

Ίβ = °> ⁴⁹ ₁₇ = 36.08

^ ₁₂ =

η = 1.75700
η = 1.74950

η = 1.65160

η = 1.80518
η = 1.48749

η = 1.51633
η = 1.77250

ν = 47.9 ν = 35.2

ν = 58.6

ν = 25.4 ν = 70.1

ν = 64.1 ν = 49.6

2. Bright, super-wide-angle lens consisting of ten lenses grouped into eight lens elements with minimal aberration, the rear focal length of which is at least 1.6 F , characterized in that the following design data are available:

F = 100; 1: 2.4; Angle of view 2ω = 96.80 °

r* =■r * = ■

r " =

^ru ~ ^r u ~

316.035 d₁ d ₁ = 40.70 η = 1.64100 ν = 56.9 860.727 d₂ d ₂ = 0.50 192.992 d_s d _s = 10.00 η = 1.78800 ν = 47.5 85.423 d_t d _t = 38.70 224.740 d_s d _s = 6.00 η = 1.58913 ν = 61.1 79.827 d_a d _a = 54.40 273.245 d-id-i = 11.60 η = 1.75500 ν = 52.5 76,470 d₈ d ₈ = 78.15 η = 1.74950 ν = 35.2 -358.257 d*d * = 16.05 742,100 = 45.35 η = 1.65160 ν = 58.6 -99.663 d_n d _n = 10.00 -81.765 d₁₂ d ₁₂ = 6.00 η = 1.80518 ν = 25.4 243.745 = 6.00 η = 1.48749 ν = 70.1 307,472 dd = 9.90

33 -409,540 <* « 24 30 926 1.56873 44th ν = 63.1 -112.317 hi =hi = 577.870 = 21.95 "= 1.77250 ν = 49.6 ^rie ⁼ ^r ie ⁼ -160.725 = 0.50 ^rn~ ^r n ~ = -120.642 = 36.15 "= 'IS ='IS = = -1515.152 ^1.2-3^ 1.2-3 P 1.2-3-4.5 ^: P 1.2-3-4.5 ^:

The invention relates to super wide-angle lenses with minimal aberration, consisting of ten lenses combined to form eight lens elements, the rear focal length of which is at least 1.6 F.

In the last few years, wide-angle lenses have developed considerably, and it has been possible to Considerable progress in the manufacture, in particular, of high-speed super wide-angle lenses of the type of inverted telephoto lenses to make. In this context, for example pointed to the DT-OS 14 97 596, in which Fig. 3 a wide-angle lens of the aforementioned Genus is shown. This known wide-angle lens allows a relative aperture of 1: 4 with a field of view of 90 °, the focal length on the image side being about 1.7 times the Corresponds to the total focal length.

The invention is now based on the object of providing a wide-angle lens with an aperture ratio greater than 1: 4 to create a satisfactory imaging performance over an image field of at least 90 ° diameter has, with which in particular a high illuminance in the wide-angle range is achieved will. Furthermore, a perfect correction of all image errors should take place over the entire image field.

This task is achieved by forming a wide-angle lens of the type mentioned above with the Construction data according to one of the data tables listed in the characterizing parts of claims 1 and 2 solved.

Objectives according to the invention are thus distinguished from the known objectives in that that with a relatively large relative aperture over an image field of more than 90 ° a satisfactory one Have imaging performance.

During the development of the objective according to the invention, the following conditional equations were used went out: