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Method and device for calibrating rainbow ring radius of secondary rainbow

A rainbow ring and rainbow technology, applied in the measurement of phase influence characteristics, etc., can solve the problems of inaccurate data, inability to save the rainbow ring and related parameters, glass beads falling off, etc.

Inactive Publication Date: 2011-08-17
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 Saving the formed rainbow ring and related parameters can not realize the statistical analysis of the test data; (4) the radius of the rainbow ring is estimated by the circular measuring scale, which makes the obtained data inaccurate, and the measured glass beads have a large deviation in refractive index

Method used

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  • Method and device for calibrating rainbow ring radius of secondary rainbow
  • Method and device for calibrating rainbow ring radius of secondary rainbow
  • Method and device for calibrating rainbow ring radius of secondary rainbow

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Embodiment 1

[0060] The invention provides a method for calibrating the radius of the rainbow ring of the secondary rainbow in the process of measuring the refractive index of high refractive index glass beads. The method can accurately measure the radius of the rainbow ring of the secondary rainbow, and then can statistically analyze the measured glass The refractive index of the beads.

[0061] A beam of parallel light is irradiated on the high-refractive index glass beads, and the light will be refracted out of the glass beads after undergoing one, two or multiple reflections inside the beads, and a deflection angle will be formed between the outgoing light and the incident light direction, such as Figure 1(a) shows. When the angle of light incident on the glass beads increases, the deflection angle will gradually decrease, and after reaching the minimum value, it will gradually increase, and the light with the minimum deflection angle is called Cartesian light. Since the light rays ar...

Embodiment 2

[0094] according to figure 2 For the experimental device shown, design the structure of the measuring device shown in Figure 6(a), (b).

[0095] In the device for calibrating the radius of the rainbow ring of the secondary rainbow in the high refractive index glass bead refractive index measurement process of the present invention, laser 1 emits laser light in Fig. 6 (a), is reflected by first reflector 2 and passes through lens 3, and the transmitted light passes through Reflected by the second reflector 4, the light beam passing through the aperture 5 is reflected by the third reflector 6 in Fig. 6(b), the light beam passes through the glass slide 8 on the stage after going vertically upward, and the X, Y translation structure 7 is used to adjust the light beam on the stage. The glass microspheres 9 on the glass slide 8 make the light beams impinge on the glass microspheres 9 , thereby obtaining a secondary rainbow image on the receiving screen 10 . At this time, the lifting ...

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Abstract

The invention provides a method and device for calibrating a rainbow ring radius of a secondary rainbow. The method is characterized by comprising the following steps of: arranging a circular ring with a known diameter L in advance, picking up an image of the circular ring by a camera to be transmitted to a computer and measuring a number m of pixels included in a line section of the diameter L so as to figure out a pixel size L / m; and measuring a number M of pixels included in a diameter of the secondary rainbow and combining with the calculated size of each pixel so as to figure out a radius r MXL / (2Xm) of the secondary rainbow.

Description

technical field [0001] The invention relates to a method and a device for calibrating the radius of a rainbow ring of a secondary rainbow in the process of measuring the refractive index of high-refractive index glass beads, that is, a method and a device for calibrating the radius of a rainbow ring of a secondary rainbow, which belong 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/41
Inventor 李大海郭东华薄健康包左军吕虎张智勇王琼华苏文英陆宇红马学锋李丹马骏王玮刘恒权
Owner SICHUAN UNIV
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