A high-magnification microscopic imaging optical system and optical device

Abstract

The present application provides a high-magnification micro-imaging optical system and optical device. The key points of the technical solution are: including the first lens group arranged in sequence from the object side to the image side along the optical axis, and the first lens group is arranged along the optical axis from the From the object side to the image side, a first lens with positive power, a second lens with positive power, a third lens with positive power, a fourth lens with positive power, and a third lens with positive power are arranged in sequence from the object side to the image side. Five lenses, a sixth lens with negative power, a seventh lens with positive power; a second lens group including an eighth lens with negative power; the power of the first lens group The ratio of φA to the focal power φ of the entire optical system satisfies: 0.055≤φA / φ≤0.075; the ratio of the focal power φB of the second lens group to the focal power φ of the entire optical system satisfies: -0.5≤φB / φ ≤‑0.3. The high-magnification microscopic imaging optical system and optical device provided by the present application have the advantages of high magnification, high resolution and long working distance.

Description

technical field [0001] The present application relates to the field of optical technology, in particular, to a high-magnification microscopic imaging optical system and an optical device. Background technique [0002] In the aquatic environment, the particulate organic carbon formed by micro organisms such as bacteria, algae and biodebris is the main participant and undertaker of the food chain and carbon cycle process in the aquatic environment. Studying the role of the above-mentioned tiny organisms or tiny particles in the maintenance of the food chain or the process of carbon cycle is an important means to explore and analyze the material cycle and change mechanism in the water environment from the micro level. In particular, the dynamic change process of micro-organisms in the water environment is difficult to accurately detect and classify due to the wide variety and small scale, so it is necessary to use microscopic observation technology for research. [0003] In th...

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Problems solved by technology

[0004] In order to achieve live and in-situ observation of bacteria, algae and other micro-organisms in the water environment, the object to be detected needs to be kept at a certain distance from the microscopic optical system. The current large numerical aperture and high magnification microscope objective lens is difficult to meet the high resolution at long working distances. rate observation

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