DE1815217U - FINE-LENS PHOTOGRAPHIC LENS. - Google Patents

Description

P.A.323151 * 5/24/60

OAEL ZlISS ΙΈ HEIDEIBEIM AN DEE BEEIZ

Five lenticular s phot ographic .jQft j_ e kjiv

The present invention "relates to five lens photographic ones Lenses with an aperture ratio greater than 1s5 * 6 and

κ . ₀

an angle of view of about -9, which consists of five individual lenses "

~ stands, of which the first three and the last collectively ·' - are and. the fourth is dispersive, and "at which the ATostand

. of the anterior lens solar unit from the image plane is smaller than

% ■

I 110 io the focal length (f) of the lens «

The investigations on which the invention is based have

\ result that there is a good compromise between the individual

Achieve aberrations can _see if the five lenses I meniskenförmig so deflects all that their hollow faces of the £ image plane faces. The diaphragm should be arranged between the i fourth and the fifth lens and have a distance of less than 0.6 · f from the rear f focal point, furthermore

I , the overall length should be between 0.25 * f and 0.50 · f i and the sum of the air spaces in the "limits between 0.15 · f \ and 0.28 · f.

r '■ ^

} With regard to the Petzval sum, it is advantageous to use the

I choose glasses of the lenses in such a way * that two of the refractive index (n)

1 G 438

the diffusing lens and the arithmetic mean (n_) the following relation consists of the refractive indices of all converging lenses?

1.5 <n _a <1.68 <η

In the following, the calculation data are given for an example of an objective according to the invention, its lens section the following figure shows. In the figure and in the following table are indicated .;

with Lj to Ly the lenses,

the radii, the vertex distances, the refractive indices and the oversight numbers.

with r 1 until ^r 10 with d 1 until ^d 9 with ⁿ d with ^v d

The figures are standardized in such a way that the focal length the value f = 1 gives »The focal ratio of this

For example, the angle of view is ± 9 ° in _{1s 4 9.}

Tabel

Lentils radii vertices
distances

Δη
r

: ι

III

xy = + 0.587H

= +6.97818

= +0.34974

= +0.62192

= +0.42473

c +5.46360

= +8.41420

r ₈ = +0.20534

r _g = +0.70794

^r 10 ^{= +4} -37862 = 0.0650 1.55232 63.49

d ₂ = 000050

0.0840 1.55232 63.49

= 0.0015

= 0.0780 1.48749 70.07

O.OO50

d ₇ = 0.1080 1.75692 31.74

d _o = 0.2100

d _n = 0.1230 1 ο 69895 30.05

+ 0.94070 / f

■ 0.0791 5 / £

+ 1.57923 / f

-0.88809 / f

+ 1.14776 / f

-0.08923 / f

+ 0.08990 / f

-3o08618 / f

+ 0.98730 / f

-0.15963 / f

Back focus s ^{1 = 0.3001}

Are within the scope of the present invention in particular lenses whose design data come so close to the values in the table above, that any refractive power (Δη / r) by no more than -0.30 · 1 / f and each vertex distance (d) by no more than -0.05 · f from the respective values given in the table deviates.

Claims (2)

f.A.32315> 2 <i..5.60 Protection claims ; 1 . Photographic lens with an aperture ratio greater than 1: 5.6 and an angle of view of about -9 ° _5, which consists of five individual lenses, the first three of which are ^ and the last are gathering and the fourth is dispersive? and where the distance of the front lens vertex from the t image plane is less than 110 $ of the focal length (f) of the ob- • jective, characterized by? that the five lenses all meniscus-shaped are curved and their hollow surfaces of the Face the image plane with the diaphragm positioned between the fourth and fifth lenses and from the rear focal point a distance of less than 0.6 ° f, the length in the G-limits between 0.2-5 ° f and 0.50 · f and 'the sum of the air spaces in the G-limits between 0.15 * f and 0.28 'f lies. 2) A photographic lens according to claim 1, characterized in that between the Bre-number of stitches (n) of the lens scattering \ and the arithmetic mean (n) is the following relationship of the refractive indexes of all the lenses collecting% ί 1 .5 <n_ <1 .68 <η to Δ ^ 3. Photographic lens according to claim 2, characterized draws that its design data are so close to those in the I. The values given in the table below mean that each Surface power (Δη / r) by no more than -O.3O · 1 / f and any vertex distance (d) by no more than -0.05 * f deviates from the values given in the table: lenses ^r 2 Radii Parting
distances 1 ⁿ d ^v d .49 + O ₀ Δη
r = + 0.58714-f 94070 / f ^L I T ₃ ^d 1 ^: .55232 63 -0. = + 6.97818'f 07915 / f ^r 4 dg: 1 .49 +1. = + 0.34974-f 57923 / f ¹ II r ₅ ^d 3 ^: = 55232 63 -0. = + 0.62192-f 88809 / f ^r 6 ^d 4 ⁼ 1 0 07 + 1. = + 0.42473 * f 14776 / f ¹ III ^r 7 ^d 5 ⁼ .48749 70 -0. = +5.46360 «f 08923 / f ^r 8 ^d 6 ⁼ 1 .74 +0. - + 8.41420-f 08990 / f "ΠΓ ^r 9 ^d 7 ⁼ o75692 31 -3. = + 0.20534'f 08618 / f ^r 1C ^d 8 ⁼ 1 0O5 +0. = + 0.70794'f 98730 / f \ T ^d 9 ⁼ .69895 30th -0. ρ + 4.37862-f 15963 / f = 0.3001 • f = 0.0650-f = 0 "0050'f = 0.0840'f = 0.0015 ° f - 0.0780 «f = 0.0050'f = 0.1080-f = 0.2100'f = 0.1230'f Back focal length;