Objective lens of microscope

Abstract

The microscope objective lens is composed of seventeen lens bodies which are sequentially and coaxially arranged from the object side to the image side, and a first cemented lens set is composed of afirst lens body and a second lens body and is a positive lens body; the third lens is a positive lens; the fourth lens, the fifth lens and the sixth lens form a 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 a positive lens; the eleventh lens and the twelfth lensform a fourth cemented lens group which is a negative lens; the thirteenth lens and the fourteenth lens form a fifth cemented lens group which is a negative lens; the fifteenth lens, the sixteenth lens and the seventeenth lens form a sixth cemented lens group; wherein the focal length f1 of the first cemented lens group is greater than or equal to 14mm and less than or equal to 16mm, the focal length f of the whole lens is greater than or equal to 3.35 mm and less than or equal to 3.37 mm, and the total optical length TTL is greater than or equal to 64mm and less than or equal to 65mm. The lens has the advantages of high magnification, large numerical aperture, flat field and apochromatism.

Description

technical field [0001] The invention relates to a microscope, in particular to an objective lens of the microscope. Background technique [0002] The microscope is the most common tool for human beings to explore the microscopic world, and the microscope objective lens is one of the most important optical devices that constitute the microscope. At present, large-aperture and high-resolution microscope objectives have important applications in biofluorescence microscopes, confocal microscopes and other microscopes. Especially in the field of biomedicine, in order to observe tiny organisms and their tissue structures more directly, a microscope objective lens with a larger field of view and higher image quality is required. 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...

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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