Microscope objective optical system for video imaging

Abstract

The invention provides a microscope objective optical system for video imaging, which is formed by sequentially arranging a first lens set, a second lens set, a light splitting prism, a third lens set, a fourth lens set, a fifth lens set, a sixth lens set, a seventh lens set, an eighth lens set and a ninth lens set along an optical axis from left to right, wherein a pre-positioned objective set of the system is formed by the first lens set and the second lens set; a main objective set of the system is formed by the third lens set, the fourth lens set, the fifth lens set, the sixth lens set, the seventh lens set, the eighth lens set and the ninth lens set; the focal length of the third lens se is fU3, the focal length of the fourth lens set is fU4 and the focal length of the main objective set is fE2; and a relation of the fU3, the fU4 and the fE2 is as follows: the absolute value of fU3 / fU4 is more than 0.46 and less than 0.68, and absolute value of fU3 / fE2 is more than 6.23 and less than 7.53. The microscope objective optical system disclosed by the invention has the characteristics of large-numerical-value hole diameter, large view field, long working distance, small relative distortion and high amplification factor in a waveband range of 360-550nm, and the imaging quality of the system reaches to the diffraction limit.

Description

technical field [0001] The invention belongs to the technical field of optical instruments, in particular to a microscopic objective optical system for video imaging, which is mainly applicable to the inspection of electronic industry production lines, the verification of printed circuit boards, and the welding defects (printing misalignment, edge collapse, etc.), single-board PC verification, vacuum fluorescent display VFD verification, and plant epidermis observation by the Academy of Forestry, skin inspection in the beauty industry, etc., it will enlarge the image of the object and display it on the microscope screen. And it can be taken into pictures or videos for further analysis and processing. Background technique [0002] With the rise of CCD cameras, microscopes can transfer real-time images to TVs or monitors for direct observation, and can also be photographed by cameras. With the development of the digital industry and the computer industry, the functions of the...

AI Technical Summary

Problems solved by technology

[0005] Modern microscope objective lens has reached a high degree of perfection, its Numerical aperture is close to the limit, the center of the field of view resolution The difference from the theoretical value is very small. However, the possibility of increasing the field of view of the microscope objective lens and improving the imaging quality at the edge of the field of view still exists. This kind of research work is still in progress.

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