DE1186234B - Microscope objective with a leveled field of view - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school Class: G 02 b

Number:
File number:
Registration date:
Display day:

German class: 42 h -3/01

1186 234
L43110IX a / 42h
3rd October 1962
January 28, 1965

It is known that microscope objectives, especially dry systems, have a thick negative To use meniscus as a front lens in order to achieve a correction of the field curvature. The difficulty in correcting the caused by this thick negative meniscus The remaining image errors are then caused by additional other construction elements in the lenses balanced. Lenses of this type are, for example, by the German patents 821126,924 539, 970 606 became known.

According to the present invention, an excellent correction of all image errors, especially the field curvature and astigmatism, as well as a good correction of all off-axis image errors, in particular the asymmetry error, can be achieved. This is possible because that in a lens, as for example in the above-mentioned patents, in particular the German Patent 924 539, is shown, two collecting putty surfaces are arranged, the turn their hollow sides towards the object. These collecting putty surfaces are most useful in the housed image-side part of the lens. It is particularly advantageous in the last link of the object-side Part as well as in the negative corrective element that follows it with a large distance collecting putty surfaces to be provided. As a result, the new lenses differ significantly, in particular

Microscope objective with a leveled field of view

Applicant:

Ernst Leitz G. m. B. H.,

Wetzlar, Laufdorfer Weg

Named as inventor:

Walter Klein, Wißmar (district of Wetzlar)

special from that in Fig. 3 of the German The type shown in U.S. Patent 924,539.

To explain the mode of action of the two collecting cemented surfaces, it can be said that with the microscope objective according to the invention

ao the collecting putty surface arranged in the negative element on the image side, the edges of the coma tufts and through the collecting cement surface present in the preceding member near the pupil, the zones within the coma tufts are corrected.

In the figure, an objective according to the invention designed according to claim 3 is shown. The collecting putty surfaces are the surfaces r ₁₅ . In the table are the exact dates

r ₁₂ and

specified for the lens. Thereby means

r the radii,

d the lens thickness,

/ the air gaps,

n _{e is} the refractive index of the glass used for the e-line,

v _t , the Abbe value associated with these types of glass,

f _{e is} the focal length of the entire system,

A the aperture,

ß'e the reproduction scale.

Claims (3)

Patent claims: 1. Microscope objective with a flattened field of view with a thick negative meniscus as Front lens at least three more links at intervals that are smaller than the center thickness of the preceding term, followed by another negative one at a large distance Link is provided on the image side, characterized in that in the 409 770/168 ί 186 234 Objectively two collecting cemented surfaces are provided, which turn their hollow sides towards the object. 2. Microscope objective according to claim 1, characterized in that the collecting cemented surfaces are provided in the image-side members of the lens. 3. Microscope objective according to claims 1 and 2, characterized by the following data: r ₂ = r "= Ta = Γ- = r = r _a = ¹ IO = ^r u ^{= r} i5 ^{= r} ie = fe = do = 0.17 1.52491 = 0.8807 1.78869 Ve I ₀ = 4.56 58.3 -2,392 d _x = 0.25 1.48772 -3.96 ¹ I. = 1.9 43.5 -23.999 d ₂ = 0.33 1.55379 -7.98 k = 1.0 1.48772 81.6 + 158.795 d ₃ = 4.9 +7.877 d _t = 0.65 1.81272 49.4 -9.002 V = 1.0 1.48772 81.6 -40.845 ^d 5 = 4.0 + 8.148 ^d 6 = 0.3 1.48772 40.6 -18.522 H = 5.0 1.46011 81.6 + 11.37 d ₇ = 1.0 -7,548 d _s = 17.65 1.79192 81.6 +22.942 H - 9 5 1.70444 67.3 + 11.47 d » = 0.9 -15.35 ^d io = 150.0 25.5 + 6.502 H = 40.007 29.8 4.0157 ß'e sheet A = 0.75 For this 1] drawings 770/168 1.65 Q Bundesdruckerei Berlin