DE1572691C - Six-unit lens with high light intensity, especially for screen photography - Google Patents

Description

^ The invention relates to a six-link Objective with high light intensity of at least 1: 0.80 relative aperture, preferably for X-ray, screen image and oscillograph photography, the sharp, excellent image angle of which is a maximum of 34 °. '

In X-ray and screen image photography, five-element lenses with a front and a rear element and a relative aperture of 1: 0.85 are known. However, these lenses only have an image format of a maximum of 63 x 63 mm ² and are unsuitable for larger image formats due to the structure of the rear section. In X-ray diagnostics in particular, however, larger image formats have recently become desirable in order to improve the recognizability of details;:; - V ¹ '^; - ^r> :.

It is therefore the. Purpose of the invention to eliminate the shortcomings of the prior art and to meet the requirements of modern X-ray and screen image photography. ₍

The invention is based on the task of creating a lens for screen image photography which ίο fully characterizes ^{an image format of 100 × 100 mm 2 with high image quality and a large relative aperture.}

L ₁ r, =
r ₂ = + 221.1
-794.0 /.
d ₂
H = 38.3 1.6204 59.8 L ₂ V = + 143.2.
+ 570.9 d ₄ = 0.1
= 42.2
= 10.1 1.6220 53.0 L ₃
L ₄ »'S = -428.3
+ 79.1
+481.3 / / 3
ds
U = 12.7
= 31.6 1.6728
1.6202 32.2
60.3 > 8 =
r ₉ = -3913.0
+ 115.7 < =, 17.6
= 11.7.
= 6.1 1.6254 35.8 L, ru = + 110.9
-310.5 Is
d _s
4th = 23.7 1.6242 47.0 L ₇
L ₈ r _i3 =
»" 14 = + 137.7
-74.7 ..
+ 7492.0 = ! < ²
= 50.4
= 14.2
= 37.5 1.6256
1.7281 35.7
'■■'; ■ 28.4

r ₁₅ = -72.1

r ₁₆ = 00

d, = 11.0

1.5686-56.1

. It is advantageous if the rear section L ₅ _ _8, in particular at full ausgenutztem angle, a Ebenungslinse L is followed. ₉

The novel design of the rear section creates an objective which, with a high light intensity of at least 1: 0.80 relative aperture, images a fluorescent X-ray screen or the like with good image quality on a format of 100 x 100 mm ² . This takes into account the requirement in X-ray diagnostics for larger image formats, and the detail perceptibility of the recorded images is significantly improved.

In the above table and the drawing is that of the invention, with a level

Claims (3)

3 4 nung lens L9 provided lens with the relative of a front and a rear part, where opening l; 0.80, the focal length / = 125 mm and the front part of two converging lenses and an angle of view of 34 ° indicated. diffusing cemented link and the rear link from ρ .., a diverging lens, a converging lens and ratentansprucne: 5 assembled in one joint cemented link 1. Six-unit high-speed lens, are characterized by the following especially for screen photography, consisting of dimensions ^r i - +221.1 di = 38.3 1.6204 59.8 L ₁ r ₂ = -794.0 H = 0.1 ^r 3 = + 143.2 di = 42.2 1.6220 53.0 L ₂ '4 - + 570.9 H = 10.1 '5 = -428.3 d ₃ = 12.7 1.6728 32.2 L ₃ '6 = + 79.1 J ₄ = 31.6 1.6202 60.3 L ₄ '7 = +481.3 / 3 - 17.6 'a = -3913.0 d> = Π, 7 1.6254 35.8 L, '9 = + 115.7 4th = 6.1 ^r w = + 110.9 4th = 23.7 1.6242 47.0 L _b ''11 = -310.5 / ₅ = 1.2 r ₁₂ = + 137.7 άη = 50.4 1.6256 35.7 L ₁ 'Ί3 = -74.7 d _H = 14.2 1.7281 28.4 L ₈ ''14 = + 7492.0 k = 37.5 '' l5 = -72.1 (L = 11.0 1.5686 56.1 L ₉ = cc 2. Lens according to claim 1, characterized gekennzeichnel that in particular when the angle of view is fully used the rear link is followed by a leveling lens. 1 sheet of drawings