objective lens of a microscope

Abstract

The invention discloses a microscope objective lens, which consists of seventeen lenses arranged coaxially in sequence from the object side to the image side, the first lens and the second lens form the first cemented lens group, which is a positive lens; the third lens is a positive lens lens; the fourth lens, the fifth lens and the sixth lens form the second cemented lens group, which is a positive lens; the seventh lens is a positive lens; the eighth lens, the ninth lens and the tenth lens form a third cemented lens group, which is positive lens; the eleventh lens and the twelfth lens form the fourth cemented lens group, which is a negative lens; the thirteenth lens and the fourteenth lens form the fifth cemented lens group, which is a negative lens; the fifteenth lens, the tenth The six lenses and the seventeenth lens form the sixth cemented lens group, which is a positive lens. The focal length of the first cemented lens group is 14mm≤f1≤16mm, and the focal length f of the entire lens satisfies: 3.35mm≤f≤3.37mm, and the total optical length is TTL Satisfy: 64mm≤TTL≤65mm, the advantage is that it has the characteristics of high magnification, large numerical aperture, flat field and apochromatic.

Description

technical field [0001] The present invention relates to a microscope, in particular to an objective lens of the microscope. Background technique [0002] Microscope is the most common tool for humans to explore the microscopic world, and microscope objective lens is one of the most important optical devices that constitute a microscope. At present, large-aperture, high-resolution microscope objectives have important applications in biological fluorescence microscopes, confocal microscopes and other microscopes. Especially in the field of biomedicine, in order to observe microscopic organisms and their tissue structures more directly, microscope objectives with a larger field of view and higher image quality are required. Various types of microscope objective lenses currently available cannot meet the requirements for high imaging quality and large numerical aperture of microscope objective lenses in more fields. Therefore, further improving the numerical aperture and imagin...

AI Technical Summary

Problems solved by technology

At present, all kinds of microscope objectives can not meet the requirements of high imaging quality and large numerical aperture of microscope objectives in more fields. Therefore, further improving the numerical aperture and imaging quality of microscope objectives is very important for various fields.

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