Device and method for measuring refractive index of high-refractive index glass microsphere

Abstract

The invention discloses a device and a method for measuring a refractive index of a high-refractive index glass microsphere. A camera 11 is arranged on a lifting device; a receiving screen 10 is arranged below the camera 11; a reader 13 is arranged on a mobile station of the lifting device and is used for reading distance from a glass microsphere 9 to the receiving screen 10; an objective table for accommodating a glass slide 8 is arranged below the receiving screen 10; the objective table is arranged on a movable platform of an X / Y translation structure 7; and emergent light of a laser 1 passes through an aperture on the objective table upwards to irradiate the glass microsphere 9 through a lens 3 and a diaphragm 5, a secondary rainbow image is formed on the receiving screen 10, the radius of the secondary rainbow image is measured, and the refractive index of the high-refractive index glass microsphere is calculated according to the distance from the glass microsphere 9 to the receiving screen 10 and the radius.

Description

technical field [0001] The invention relates to a device and method for measuring the refractive index of high-refractive-index glass beads, belonging to the field of measurement technology. Background technique [0002] With the rapid development of road construction in our country, the amount of glass beads used in conjunction with road retroreflective materials has increased rapidly. Glass beads are playing an increasingly important role in traffic safety products and facilities such as reflective film, reflective ink, reflective marking lines, reflective cloth, reflective leather, reflective webbing, and reflective safety silk fabrics. [0003] Glass bead is a silicate material with good chemical stability, mechanical strength and electrical insulation, and the most unique feature is its retroreflective properties for light. The glass beads used in materials utilizing the retroreflection properties of glass beads are basically glass microspheres. Glass beads are divide...

AI Technical Summary

Problems solved by technology

The main defects of this measurement device are: (1) Since the glass beads are adsorbed on the glass slide by adsorption, the five-dimensional adjustable bracket supporting the slide glass will easily cause the glass beads to fall off during the adjustment process, and continuous multi-measurement cannot be performed. (2) The alignment of the laser and the glass beads is achieved by adjusting the long focal length positive lens and the slide glass respectively through the five-dimensional adjustable bracket, and the alignment error increases the measurement error; (3) cannot Save the formed rainbow ring and related parameters, and cannot realize the statistical analysis of test data

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