Spherical aberration eliminating variable-focus double liquid core column lens for measuring liquid refractive index and liquid phase diffusion coefficient

Abstract

The invention relates to a spherical aberration eliminating variable-focus double liquid core column lens for measuring a liquid refractive index and a liquid phase diffusion coefficient, and belongs to an optical measurement device and method. According to the invention, a front liquid column lens is taken as a liquid phase diffusion cell and an imaging element, a rear liquid core column lens is taken as a spherical aberration eliminating element, the spherical aberration eliminating position of the double liquid core column lens can be adjusted by selecting a numerical value of the refractive index of a liquid in the rear liquid core column lens, and the refraction index of a liquid in the front liquid core is ensured to have a wide variation range within the scope of small spherical aberration. The spherical aberration eliminating variable-focus double-liquid core column lens improves the detection sensitivity of the refractive index of the liquid in the front liquid core, and the diffusion coefficient of different liquids can be measured more accurately and more reliably by being combined with an equal refractive index thin layer movement method or a transient refractive index space distribution method.

Description

technical field [0001] The invention belongs to an aplanatic optical cylindrical lens, in particular to an aplanatic variable-focus optical cylindrical lens with a liquid core. Background technique [0002] Liquid refractive index and liquid phase diffusion coefficient are important basic data for researching mass transfer process, calculating mass transfer rate, and chemical design and development in industries such as biology, chemical industry, medicine and environmental protection. However, accurate measurement of these two data requires the lens system to obtain images with clear focus. A good aplanatic imaging system can make the image of liquid refractive index fine and sharp, the focus position is clear, and the measurement is more accurate. Before proposing the present invention, we proposed measuring the refractive index and liquid-phase diffusion coefficient with the equal-refractive-index thin-layer method (Sun Licun, Pu Xiaoyun, Meng Weidong, etc., Chinese inven...

AI Technical Summary

Problems solved by technology

At present, the method of correcting spherical aberration is generally by increasing the refractive index of the lens material, matching the curvature, combining positive and negative lenses, or using aspheric lenses, etc. These methods generally only have aplanatic effects at certain fixed refractive index points. Correspondingly measure the refractive index and diffusion coefficient, but cannot accurately measure the two kinds of data that are continuously distributed throughout the diffusion system

Images