Aplanatic continuous zoom double cemented liquid stem lens system and its application

Abstract

The invention provides an aplanatic continuous zoom double-glued liquid core cylinder lens system and its application, which belongs to an optical measurement device or device for measuring liquid refractive index and liquid phase diffusion coefficient. It includes a symmetrical crescent-shaped cylindrical surface glued, and its cavity can be The front lens group is injected with liquid to form the liquid core, and the rear lens group is cemented double to limit the spherical aberration of the imaging system. In the present invention, when different liquids with a refractive index of 1.3300 to 1.5300 are injected into the liquid stem lens, the focal length of the lens f Can achieve 101.458 mm ~54.176 mm The continuous and smooth change of the lens, and in the whole zoom range, the spherical aberration of the lens is always less than 12 μm , close to the diffraction limit, high imaging quality, and the accuracy of measuring the refractive index of liquid is better than 10 ‑5 RIU, which can simultaneously improve the accuracy of measuring the liquid phase diffusion coefficient.

Description

technical field [0001] The invention belongs to a cylindrical lens optical system and application for measuring liquid refractive index and binary liquid phase diffusion coefficient. Background technique [0002] Liquid refractive index and liquid phase diffusion coefficient are important parameters to understand the optical properties, purity, concentration, dispersion, mass transfer process and other properties of substances. Accurate measurement of these two parameters requires a zoom lens with good resolution and imaging quality. Spherical aberration is the main factor affecting the measurement of the above parameters by the liquid zoom lens under the irradiation of monochromatic light. In order to correct the interference of spherical aberration, before proposing the present invention, we adopted the method of composing music to eliminate spherical aberration (Sun Licun, Pu Xiaoyun, Meng Weidong, etc. , Chinese Invention Patent ZL 2013 1 0412166.X[P]; Licun Sun, Chao Du...

AI Technical Summary

Problems solved by technology

However, the aplanatic aberration obtained by a single operation can only be limited to a specific focal length value. For another specific focal length value, the aplanatic aberration must replace the liquid injected into the rear liquid core, and the operation procedures are cumbersome. When , the imaging quality corresponding to different liquid thin layers is quite different, which limits the accuracy of the liquid phase diffusion coefficient

Images