DE1447289A1 - Photographic lens - Google Patents

Description

CARL ZEISS IN HEIDENHEIM a.d.BRENZ Photo lens

The invention relates to ph itographic lenses modified from GauStyp.

The invention is based on the object of developing an objective lens of opening f j 1.4 with an image angle of approximately _ + 22.5 ° and to bring the back focus to an amount of at least 0.67 · f, where f is the focal length of the Is to be understood objectively.

According to the invention it is proposed eight for this purpose Provide lenses and arrange them in such a way that the following conditions are met:

a) The anterior segment is a meniscus-shaped composite segment, which has its hollow side turned towards the second Gllede; e "s consists of two together cemented lenses of opposite strength *

The refractive index ng of the glass of the converging lens of this member and the refractive index r \ "of the glass

the diverging lens of this member suffice -

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809804/0462.

the relationship
1.60 < n

The Abbe number v "of the glass of the converging lens and the Abbe number v" of the glass of the diverging lens satisfy the relationship
25 <V _z <V ₃ <55;

ä the sum of the surface powers of this term is within limits

-0.25 x 1 / f and +0.25 x l / fj

b) The second link is a meniscus-shaped one Converging lens with the raised side facing the front member;

e) the third link is a meniscus-shaped diverging lens, which the hollow side of the screen faces;

d) the diaphragm is between the third and fourth link

e) the fourth link is a meniscus-shaped dispersive link, which its hollow side the

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* ■

Faceplate facing; it consists of two opposing lenses cemented together Refractive power, the glass of the diverging lens having a higher dispersion than the glass the converging lens cemented with it;

f) the fifth link is an asymmetrical converging lens, Cups are so bent that the relationship

^b v - ^b h <°

consists, where b _{y is} the power of the front and b ^ is the power of the rear surface of this lens;

g) the sixth link is a converging lens;

h) between the radii (r .; r ^ and ν Α of the respective front surfaces of the limbs in front of the diaphragm there is the relationship

0.2 · f <rg <r ^ <T ₁ <5 # O »fj

i) The relationship exists between the radii (* \ ₀ J r ₁₂ and vu) of the rear surfaces of the members behind the diaphragm

f <-r ₁₀ <-r ₁₂ <-r ₁ ^ <10.0 »f;

909804/0462

kj between the center thickness (dg) of the third

Limb and the center thickness (dg + dg) of the fourth Link is the relationship

dg <0.18-f <dg + ag j

1) the sum

d ₃ + d ₅ + d ₁₀ + d ₁₂ is less than 0.10 · f.

The manufacturing data for two lenses according to the invention are compiled in the tables below, which include designated

with L the lenses

me r ......... the radii

with d ......... the vertex distances

with n-., the refractive indices for the

■ d-line of the spectrum

with ν the Abbe's numbers

In the lens according to Table I, the Pront member has positive ones Refractive power, in the case of the lens according to Table II, the front link has negative refractive power. In both cases, the sum is the refractive power of the first member within the limits

- 0.25 - 1 / f and + 0.25 x l / f.

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909804 / 0A62

Table I (see FIg * l)

_ .. apex _ Δη / r

Lens radii spacing ^ a 3. '

r, - + 1.97579-f + 0.39702 / f

τ - d.- 0.115l8.f 1.78443 43.77

r ₂ - -7.17419 f . + O, OO877 / f

d ₂ '- O, 08009-f 1.72151 29.28 f -O, 355422 / f

d, - 0.01226 "f
r, - 40.86394-f + 0.90797 / f

dn = 0.13780'f 1.78443 43.77 f -0.28688 / f

d ₅ = 0.00341-f
V ₆ - 40.49091 t, + 1. 64oi8 / f

d ₆ - 0.14512 f 1.80518 25.46 r _? -. + 0.33916 · f * 2.374o4 / f

d- - 0.26299 · f
r _a "-0.39700" f -2.028l6 / f

dg = 0.05339.f 1.80518 25.46 T ₉ - + 1.03012 · f -0.02014 / f

ag m 0.19990 "f 1.78443 43.77 r ₁₀ " -0.69229. f + 1.13309 / f

d ₁₀ »0, OOO95 · f
r _u -17, 76637 · f -O, o44l5 / f

d _xl * 0.06865.f 1.78443 43.77 -0.92290 · f + 0.84996 / f

d ₁₂ =: 0.00095. t
+3, 313OO.f + 0.23677 / f

Cl ₁₃ = 0.05721 1.78443 43.77 -2.16591 «f + 0.36217 / f

r ^S Q " 0.6789 * f

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909804/0462

Table II (see Pig. 2) lens radii

Vertex distances

II

^J IV

^L vi

^L VIII

V ₁ = + 2.11494 * f v ₂ = -6.13521 '. f j = r + 1.80543-f ₄ = + 0.93127 · f r ₅ = +3, the 81,568th f V ₆ = + 0,46674.f r = ₇ + ₈ = -0.38985 0,33282.fr-f

3Pq = +1.20662. f

r ₁₀ = -0.67370 · f T ₁₁ = -8.18072.f

^r 12 ⁼ -0 87919 f + 3.03081.f

H = -2.20805-f d, = 0.1622 * f 1.78443 43.77

d ₂ = 0.05737 * f 1.72151 29.28

= 0.00191.

d ₄ = 0.12239 * f 1.78443 43.77

= 0, OOI9I «f

= 0.15299 x f 1.80518 25.46

d "= 0.28304 * f

dg = 0.02867.f 1.80518 25.46

= 0.21037 * f 1.78443 43.77

^d 10 ^{= 0} '

. = 0.06885 * f 1.78443 43.77

d ₁₂ = 0.00096 · f

^ ₁ , = 0.06693 * f 1.78443 43.77

0.6753 · f

Aß / v

+ 0.37090 / f + 0.01026 / f

-0.39963 / f + 0.84232 / f

-0.20558 / f

+ 1.72511 / f -2.4l927 / f -2.06538 / f -0.01720 / f + 1.16436 / f -0.09589 / f

+ 0.89222 / f + 0.25882 / f

+ 0.35526 / f

909804/0 46

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Claims (2)

Claims 1. Photographic lens of the modified Gaussian type, consisting of eight lenses which are combined to form six members are characterized by the combination of the following features: a) The prontal limb is a meniscus-shaped ■ composite limb, which its hollow side turns towards the second member; it consists of two cemented together Lenses of opposite refractive power j the refractive index n _{g of} the glass of the converging lens of this member and the refractive index n "of the glass of the diverging lens of this member satisfy the relationship 1.60 <n "<n_ Ui e Abbe number v "of the glass of the converging lens and the Abbe number ν of the glass of the diverging lens satisfy the relationship 25 <V ₇ <v _q <55; They sum of the planar refractive forces of this member is within limits -0.25 x 1 / f and +0.25 x 1 / f; b) the second link is a meniscus-shaped sam- 909804/0462 mellinse, which the raised side to the frontal i ede turn; c) the third link is a meniscus-shaped dismemberment 'Diffusing lens covering the hollow side of the land return ti d) the diaphragm is between the third and fourth links; e) the fourth link is a meniscus-shaped dispersive link, which its hollow side faces the screen; it consists of two together cemented lenses of opposite refractive power, wherein the glass of the diverging lens has a higher dispersion than the glass of with cemented converging lens ^ f) the fifth Qlied is an asymmetrical converging lens, which is so bent that the relationship \ - ^b h ^<0 . where b _v denotes the breech force of the anterior and b _h denotes the breech force of the posterior surface of this lens; '809804/0462 - 9 g) the sixth link is a converging lens; h) The relationship exists between the radii (τ ^; r ^ and r ^) of the respective front surfaces of the limbs standing in front of the diaphragm 0.3'f <r ₆ <r ^ <r _x <5.0 * f; i) The relationship exists between the radii (^ ₁₀ ; r ₁₂ and r ^) of the respective rear surfaces of the limbs behind the diaphragm 0.38.f <-r ₁₀ <-r _lö <-r ₁₂ <-r ^ <10.0 «f; k) between the center thickness (dg) of the third link and the center thickness (dg + dg) of the fourth link is related dg <0.18 «d <d _Q + d ^; 1) the sum d ₅ + d ₅ + d ₁₀ + d ₁₂ is less than 0.10 · f. 2. Photographic lens according to claim 1, characterized in that that its manufacturing data are so close to the values in the table given that none of the surface forces (to / r) the amount by more than 0.4o »l / f and none the vertex distances (d) by more than 0.05 »f deviates from the relevant values given in the table. ORIGINAL BATHROOM - 909804/0462 - ίο - Lentils - "vertex - T ₁ = + 1.97579 * f + 0.39702 / f ^L ! d _x »0.11518 · f 1.78443 43.77 r ₂ = -7.17419 * f + 0.00877 / f ^L II. d ₂ = 0.08009 * f 1.72151 29.28 r _? = + 2.03690 * f -0.35422 / f d, = 0.01226.f r ^ = + 0.86394 * f + 0.90797 / f • ^l iii ci ₄ = 0.13780 · f 1.78443 43.77 r ₅ = + 2.73433 * f -0.28688 / f d ₅ - 0.00341 x f r ₆ = + 0.49091-f. + 1.64018 / f ^L IV ^d 6 = 0.14512 * f 1.80518 25.46 V ₁ = + 0.33916 * f "2.37404 / f d ₇ = 0.26299 x f
r _Q = -0.39700-f -2.028l6 / f dg = 0.05339 · f. 1.80518 25.46 r ₉ = + 1.03012-f -0.02014 / f d _g = 0.19990-f 1.78443 43.77 ^r io ⁼ -0.69229 * f + 1.13309 / f ^r l I = "* ¹⁷ ' ⁷⁶⁶⁵ 7 * f -Ό, 04415 / f ¹ VlI ⁰ H = 0.06865-f 1.78443 43.77 r ₁₂ = -0.92290.f + 0.84996 / f d ₁₂ = O, OOp95'f ' r ₁₃ = + 3.31300 * f + 0.23677 / f ¹ ViII ^d x3 = 0.05721 * f 1.78443 43.77 r _l4 - -2.16591-t + 0.36217 / f 'BAD ORIQJNAL 909804/0462 - li - Jf, photographic lens according to claim 1, characterized in that its production data are so close to the values in the table given that none of the surface powers (Δ n / r) are by more than 0.4o »l / f and none of the Vertex distances (d) deviate in amount by more than 0.05 * f from the relevant values given in the table. 909804/0462 .Lenses Radii vertex
abstain n. II r. = V ₃ --- ~ C, 13521 'f r ^ = 1.805 ^ 3-Γ i> = -fO, 93127. f rv ~ + 3.81568' f rg = + 0.46674 · f d = 0.12622'ζ 1.7 ^ -42 43.77 Ci ₂ = 0.05737- Γ 1 / Η151 29, * '^ d _; , = 0.12239 · f 1.7B443 43.77 d _r «O, OOI91« f ·: << ■ - 0.15299 * f., 80518 £ 5.46 η / ν ^ 0.37090 / f . + 0.01026 / f «0.39963 / f + 0.84232 / f -0.20558 / f + l, 7? 5U / f p, f • ^{; i} _ r, *. I. Lge / vehicle
26066 ^ ORIGINAL 909804/0462