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Immersion objective lens for microscope

A microscope and liquid immersion technology, applied in the field of liquid immersion objective lenses for microscopes, can solve the problems of frequent maintenance rate, high manufacturing cost, increase and so on

Active Publication Date: 2018-11-02
LEICA MICROSYSTEMS CMS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The comparatively low refractive power of the correction element has the disadvantage that the objective must have a large overall length in order to achieve a large correction effect, and that the diameter of the objective increases with the overall length, which is disadvantageous in many microscopic applications of
This construction is characterized by a high degree of mechanical complexity, with consequent high manufacturing costs and frequent repair rates

Method used

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  • Immersion objective lens for microscope
  • Immersion objective lens for microscope
  • Immersion objective lens for microscope

Examples

Experimental program
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Effect test

Embodiment Construction

[0026] figure 1 The immersion objective 10 is shown in a sectional view along the optical axis O as a possible embodiment.

[0027] The immersion objective 10 faces the sample space 44 in which the sample 42 is arranged. An immersion liquid 40 such as water, glycerin or a special immersion oil is located in the sample space 44 .

[0028] The liquid immersion objective lens 10 comprises the first lens group 12 of positive refractive power, the second lens group 14 of positive refractive power, the third lens group 16 of negative refractive power and the fourth lens group 28 of positive refractive power, and these lens groups are obtained from sample 42 from the sample side ， Arrange in this order. Only the second lens group 14 is designed to be movable for correcting spherical aberration, that is to say, the first lens group 12 , the third lens group 16 and the fourth lens group 18 are fixed.

[0029] Viewed from the object sample side, the first lens group 12 includes: a f...

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Abstract

An immersion objective lens 10 for a microscope 100 includes a first lens group 12 having positive refractive power, a second lens group 14 having positive refractive power, a third lens group 16 having negative refractive power and a fourth lens group having positive refractive power disposed in this sequence from the object side. The second lens group 14 is moveable along an optical axis O so asto achieve a corrective effect with respect to a spherical aberration, such that a sum of a distance V1 between the second lens group 14 and the first lens group 12 and of a distance V2 between the second lens group 14 and the third lens group 16 is constant. The corrective effect of the second lens group 14 is predetermined such that the spherical aberration is minimized for a light incidence that corresponds to a mean numerical aperture that lies between zero and a nominal aperture of the immersion objective lens 10.

Description

technical field [0001] The invention relates to a liquid immersion objective lens for a microscope, which comprises a first lens group of positive refractive power, a second lens group of positive refractive power, a third lens group of negative refractive power and a fourth lens group of positive refractive power, These lens groups are arranged in this order from the object side, wherein the second lens group is movable along the optical axis in order to achieve a corrective effect on spherical aberration, so that the distance between the second lens group and the first lens group and The sum of the distances between the second lens group and the third lens group is constant. Background technique [0002] Liquid immersion objectives intended for microscopy are known from the prior art, which allow the operator to correct imaging aberrations caused by the varying optical properties of the sample space. The imaging aberrations are, for example, spherical aberrations, which a...

Claims

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Application Information

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IPC IPC(8): G02B21/33G02B27/00
CPCG02B21/33G02B27/0068G02B21/02G02B27/0025G02B21/025G02B7/10G02B9/34G02B27/0037
Inventor 克里斯蒂安·舒尔茨克里斯蒂安·舒曼
Owner LEICA MICROSYSTEMS CMS GMBH
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