DE2032130A1 - Telescope system of Galilean design - Google Patents

Description

Dr. Ludwig Bertele
CH-9435. Hßerbrugg.

Telescopic system of Galilean design

The present invention relates to a telescopic system Galilean design with which compared to known designs a greater magnification or an extended Field of view can be achieved «.. Such constructions require ■ consist of a system part located near the eye (A) with negative refractive power and a part (B) facing the object with positive refractive power. As is well known with this one Lens sequence the field of view is severely restricted by the virtual imaging of the pupil, must be around this To counteract the appearance of the lens diameter in the po-. should be chosen as large as possible. The at ' light beam passing through the periphery of this lens

t0988S / 0637 BAE * original ■

intersect the optical axis on the eye side of the negative system part and in this way enable an expansion of the field of view. For the purpose of sufficient image sharpness after
At the edge of the image, these light bundles are of particular importance with regard to the correction of the various aberrations. The same can largely be remedied if, according to the invention, the negative system part (A) consists of at least two lens elements separated from the air space and the positive system part '(B) has at least three lens elements, of which the ip, which is closer to the eye, negative and the following (p _? ) show positive refractive power. The entire telescope system, which can be used as a telescope or telescope magnifier, thus consists of at least four
airspace separated lens members.

With reference to the drawing, five exemplary embodiments are shown, which are distinguished by their short design. In the first three examples, the first lens element attached to the eye turns the more strongly curved surface towards the eye and is cemented together from two lenses (L. and L_), the following second lens element (L_ and L.) is one that is bent towards the base diffusing meniscus, which is composed of two inis-shaped lenses, the third lens member is a cemented member of negative refractive power, which is followed by either two (Fig. 1 and 3) or three (Fig. 2) unmarked positive lines. - ■

10988S / 06 "37 .-- ■.

■, λ ■ BATH ORIGINAL

■ - 3 -

It is useful for astigmatic correction located between the ^ rstun t: nd -wcitsn lens element Air space (, £,) takes the form of a thin converging lens give or in other words the shape of an air space ι which has a greater thickness in the optical axis. as on the edge of the same »The same applies to the little one Air space between the third and fourth lens elements.

The Ü3beispiel according to Fig. 1 represents a telescopic magnifier with five Airspace-separated lens elements. The focal length is 48 mm and the distance of the object to be viewed from the Lens area 13 is 23Q mm.

The example according to FIG. 2 is a telescopic magnifier with six air-separated lens elements. The focal length is 44.5 mm and the distance of the object to the lens surface 15 is

201 mm. ' Ά

Dc3s example according to Fig. 3 is a telescope with fivefold Magnification - with five airspace separated lens elements.

Example ^ shows a lens barrel for three times magnification. The second lens element (L “) is sufficient as a simple lens;? U5? .UbildE? N. The wrenching of the small air-rough in the examples 1 - 3 is between the z ^ r ^ treumden lenses; Tjliec / h and drr Hr- r-uf f algr-nd ^ n

* iin &! i \>'tA 109885 / (1637 _OAn ^l

BADORfGiNAt

The lens is replaced by the same one of a putty surface r _o , wel-

before has a higher refractive index on the eye side than on the object side. The focal length is 87.9 mm and the distance between the object and the lens surface 13 is 300 mm.

The example Fig. 5 is a telescope five times magnification with four air space-separated lens elements. Here too, W is the effect of the air space in Examples 1-3 between the diffusing lens glisd P ₁ and the following lens replaced by the same of a putty area r _R , which is on the eye side has a higher refractive index than on the object side,

In order to ensure optimal imaging of the central image parts for a wide spectral range in the entire area of the pupil, the first lens element consists of a converging lens (L ₁ ) with a high refractive index and strong color dispersion and a diverging lens (L „) lower refractive index and lower color scattering cemented together,

The following tables show the properties of the five ■ · Embodiments given, ·

109888/0637

= - 10.0 example 1 i, a ⁿ d V = - 4.954 0.7 ^Γ 1 = + 25.22 0.8 1.76182 26.5 ^Γ 2 ^d l = 1.64050 60.1 Γ-, = - 36.0 ^d 2 = 7.0 j 6.48 4 = 6.0 ^Γ 4 - - 29.96 13.3 1.52054 69.7 ^Γ 5 ^d 3 = 1.72825 28.4 = - 60.0 ^d 4 = 4.0 ο = - 30.0 i _
2 1.0 ^Γ 7 = -600.0 1.0 1.69100 54.7 ^Γ 8 Sr 1.72825 28.4 ^Γ 9 = - 149.2 ^d 6 = 8.0 = -30.13 A- 0.2 ^Γ 10 1.64050 60.1 ^Γ 11 = + 156.0 U ₇ - =
Yy 7.5 = - 57.18 Λ = ^Γ 12 1.64050 60.1 ^d 8 =

- object = 230

F =

109885/0637

Example 2

= - 10, 89 ^d i = a, 65 1, 76182 26, 5 671 ^d 2 = Df 70 1, 620 «tl 60, 3 = + kB, 67 /. " 75 6, = - 13, 003 ^d 3 = '♦, 5 1, 55232 63, 5 = -. 6, 712 ^d u = 0 1. 72825 28,

τ, = - 27.89

= 13.9

^Γ 7 = - 55, 12th ^d 5 ⁼ 3, 7th 1 ^Γ 8 = - 27, 6k ^d 6 =
Λ 1. 3 1 ^r 9 = - 178, 5 A = a, 8th ^d 7 =
A- 5,
0. 5
15th I ₁ ^Γ 10
^r n = - 99,
= - 30, 7th
i »7 ^Γ 12 = CxO ^d 8 ■ 6th 1. ^Γ 13 = - 68, 5 O, 15th = + 577, 6th tig = 5. 0 1. «* - 68, 5 , 6910 , 72825 , 62Qi »l 620-1 62041

>, 7

28,

60.3

60.3

60.3

- object = 201

F = W, 5

988SV0637

Example 3

γ ₆ = -

= - 10, 89 = - 5, 671 = + 48, 67 = - 12, 9 = - 6, 71 = - 40, 0 = - 55, 12th = - 26, α = - 178, 5

= - 30.77

A =

d, =

1, 65 0, 70 Q, 75 6, 50

^J 5
¹ B.

13.9

3.7 1.3

= 0.8

Jt. -

5.5 0.15

= 6.6 1.76182
1.62041

1.55232
1.72825

1.69100
1.72825

1.65844

1.65844

26.5 60.3

63.5 28.4

54.7 28.4

50.9

50.9

109885/0637

Example 4

T ₁ = - 28.00

* 2 - - 9.00

^Γ ₃ = + 42.68

r ₄ = - H ₁ OO

^r 5 = - 52.00

r ₆ = - ■ 91.50

r ₇ = - 23.00

i _Q = + 235.00

r _q = - 30.05

OO

= - 47.10

r ₁₂ = + 180.00 ^Γ 13 ⁼ " ⁶⁷ » ⁵⁰

= 1.6 1.72825 23.4

= ° »8. 1.69100 54.7

4 = i, i

d- ₃ - 10.5 L = 9.2

d ₄ = 4.0

d ₅ = 1.5

^d 6 - ⁵ ' ⁵

= 0.2

= 4.5

= U, 2

= 4.5

1.62041 60.3

1.64050 60.1 1.75693 31.8 1.51011 64.2

1.49500 57.5

1.4 9500 57.5

109885/0637

~ 9 ■ -

Example 5

ⁿ d

I ₁ = - 10.89

^L l ^d i = 1.65 1.76182 26.5

X ₂ = - 5.67 ■ '■■■ :.'

^L 2 ^d p = ° i70 1.62041 60.3

r ₃ = + 48.67 ■

■ J ₁ = 0.75

r ₄ = - ■ 12.90 -. {

^L 3 _r ■ ₌ ^ _{6 7i} ^d 3 = 6.50 1.55232 63.5

^L * ζ - 4θ'θΟ ^d 4 = ⁴ '°° 1.72B25. 28.5

/ ₂ - ¹³ »20
r ₇ = - '51.30

r _tf - ₊ 335.00- ^{d5 = 4} ' ⁷ ° ^ ^{71 736 29 5} '

L ₆ . _{rg =} _ _{2fl> 50} d ₆ = 8.00 1.51680 64.2

/ ₃ = 0.15
r ₁₀ = OO '.

^L 7 ^d 7 = 6 | 6O 1.69100 54.7

^r ll - - ^{4 <} 1.35 '

109885/0837

Claims (6)

Claims / l «) Telescopic system of Galilean design, consisting of a negative and a positive system part, characterized that the negative 5 system part (A) consists of at least consists of two airspace-separated lens elements and the positive system part (B) has at least two air space-separated lens members, of which the dem Eye closer (p,) negative refractive power and the following have (p-) positive refractive power 2.) Telescope system according to claim 1, characterized in that that in the negative part of the system. (A) the first The lens element attached to the eye is the more curved one Flax turned towards the eye and cemented together from two lenses is / the following second lens member represents a diffusing meniscus to be bent towards the object and the third lens element (p 1) which is closest to the eye in the positive system part (B) has negative breaking force, whereupon rnindestans two positive converging lenses (p-,) follow. 3.) Telescope system according to claim 1, characterized in that that the one in the negative system part (A) between the form of the two lenticular links in the air space owns a collecting Linso. 109885/0637 4.) Telescope system according to claim 1, characterized - shows that -in the positive system part (B) between £ im ^ fUU
the negatlven ^ Tp.) and the subsequent positive lens is a small air space in the form of a thin converging lens 5.) Telescope system according to claim 1, characterized in that the one closest to the eye is divergent Lens element from a meniscus-shaped converging lens with a high refractive index and strong color dispersion and a diverging lens with a lower one Refractive index and lower color dispersion is cemented together » 6.) Telescope system according to claim Ij, characterized in that the negative lens member.J is cemented in positive system part (B) with the following converging lens and the refractive index on the eye side of this cemented surface is significantly greater than _{0 on the object side} the 10th of June 109885/063 7 AZ Blank page