RU1800433C - Microscope ocular - Google Patents

Abstract

Usage: the invention relates to optical instrumentation, namely, to the eyepieces of microscopes. SUMMARY OF THE INVENTION: The microscope eyepiece contains four components, the first and second of which are the positive and negative menisci, respectively, convex to the image, the third is a biconvex lens, and the fourth is a convex-flat lens. 2 ill.

Description

FIELD OF THE INVENTION The invention relates to optical instrumentation, and in particular to the eyepieces of microscopes.

The aim of the invention is to improve image quality by reducing distortion while increasing the exit pupil.

The essence of the invention lies in the fact that the eyepiece of the microscope contains four components, the first of which is the positive meniscus facing the concavity to the object, the second is the meniscus convex to the image, the third is a double convex lens and the fourth is a positive lens, the second meniscus is single and negative, and the fourth lens is single and convex.

The implementation of the second lens in the form of a biconvex lens serves to correct distortion. In this eyepiece, the distortion at the edge of the floor is 3%. Performing the fourth component in the form of a convex flat lens serves to increase the exit pupil extension, to correct image curvature, astigmatism, and chromatic aberration. The general arrangement of the eyepiece provides an enlarged anterior working segment, correction of spherical aberration for a point on the axis and in a wide inclined beam of rays. The wave aberration for a point on the axis in the entire spectral range does not exceed 0.0072 Z. The mean square wave aberration in the field, spectral range and pupil is:

a) excluding defocus and distortion of 0.053 A;

b) without taking into account the defocusing, distortion and curvature of the image 0.04 I.

It follows that the eyepiece of the microscope has improved image quality.

The invention is illustrated by drawings (Figs. 1 and 2).

In FIG. 1 is an optical diagram of the eyepiece of the microscope, in which 1, 2, 3, 4 are the first, second, third, and

ate

with

00

oh oh so

fourth components. The first and second components are the positive and negative menisci respectively, convex to the image, the third is a two-convex lens, the fourth is a convex flat lens, 5 is the exit pupil of the microscope eyepiece.

In FIG. 2 - graphs of aberrations are presented.

The eyepiece is the last link in the optical system to transmit the image directly to the eye of the observer. The plane of the objects is located at a distance of 9 mm from the first surface of the eyepiece, which coincides with its front focal plane. A diverging beam of rays falls on the eyepiece p. Rays of light pass sequentially through all four components 1, 2, 3, and 4, and the image is obtained at infinity. The rays of light passing from the object completely fill the exit pupil 5 of the microscope eyepiece, with which the observer's eye is aligned.

25 mm 10x

11.9mm 23.7mm 28.57mm 20mm

As a specific example, the microscope eyepiece is calculated with the following optical characteristics:

Focal Length Visible Zoom

Front working segment

Pupil discharge

Eye Length

Claims (1)

Linear Field 0 The eyepiece of the microscope containing four components, the first of which is the positive meniscus facing concavity to the object, the second is the meniscus, 5 convex to the image, the third is a double convex lens and the fourth is a positive lens, characterized in that, in order to improve quality images by reducing distortion 0 as the exit pupil is extended, the second meniscus is single and negative, and the fourth lens is single and convex. L4oe # ost items & FIG. / V ° Ayb & -ft #e / 0