High magnification microscopic coaxial illumination optical system

By designing a microscopic coaxial illumination optical system with a specific lens combination and beam splitter prism, the problems of chromatic aberration and volume cost in high-magnification imaging of traditional microscopes have been solved, achieving high-magnification, low-chromatic aberration, and high-image-quality imaging effects, thus meeting the market demand for low-cost, miniaturized microscopes.

CN120276140BActive Publication Date: 2026-03-31GUANGZHOU LONGWALK OPTICAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-04-27
Publication Date
2026-03-31

AI Technical Summary

Technical Problem

Traditional microscope optical systems suffer from chromatic aberration, large size, and high cost when imaging at high magnification. Furthermore, non-coaxial illumination methods lead to a decline in image quality, making it difficult to meet the market's demand for low cost, miniaturization, and high precision.

Method used

Design a high-magnification coaxial illumination optical system for microscopy, employing specific lens combinations and beam splitters, including concave-convex, biconvex, and convex-concave lenses, combined with cemented doublet lenses, to achieve low-cost, small-volume high-magnification imaging, and improve imaging quality through coaxial illumination.

Benefits of technology

Under the premise of low cost and small size, it achieves high magnification, low chromatic aberration and high image quality imaging effect, which solves the contradiction between high precision and equipment compatibility in industrial inspection and meets the market demand for low cost and miniaturized microscopes.

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Abstract

The application relates to a high-magnification microscopic coaxial illumination optical system, which comprises a front lens group, a diaphragm, a rear lens group and a light-splitting prism arranged in sequence along the light incident direction; the front lens group comprises a first lens, a second lens, a third lens and a fourth lens arranged in sequence along the light incident direction, and the rear lens group comprises a fifth lens and a sixth lens arranged in sequence along the light incident direction; wherein the first lens is a concave-convex positive lens, the second lens is a double-convex positive lens, the third lens is a convex-concave negative lens, the fourth lens is a double-convex positive lens, the fifth lens is a convex-concave meniscus lens, and the sixth lens is a convex-concave positive lens; the third lens and the fourth lens form a double cemented lens; the application realizes the comprehensive performance of high magnification, low chromatic aberration and high image quality under the premise of low cost and small size, and solves the contradiction between high precision and equipment compatibility in industrial detection.
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Citation Information

Patent Citations

  • High-magnification achromatic telecentric lens

    CN116736502A

  • Microscope objective optical system having wide spectrum, large numerical aperture, and ultra-high flux

    WO2020215867A1