A liquid refractive index high-precision measurement method based on optical autocollimation
CN118583819BActive Publication Date: 2026-08-28CHONGQING UNIV OF POSTS & TELECOMM
Patent Information
- Application Number
- CN202410837587.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2044-06-26
AI Technical Summary
Technical Problem
2019年，C.L.和S.-L.L.等人(文献Li S L,Nie Z Q,Tian Y T,et al.Liquid refractiveindex measurement system based on electrowetting lens[J].Micromachines,2019,10(8):515.)提出了一种基于电润湿透镜的液体折射率(LRI)测量系统，该系统具有体积小、操作简单等优点，但是其精度只能达到10-4RI量级，并且精度会受电润湿透镜的驱动电压的影响，因此存在对驱动电压要求较高和无法实现高精度测量的缺点
Benefits of technology
[0049]当前通用的溶液折射率测量方法主要分为折射仪法、反射法、单缝干涉法三大类，其中单缝干涉法的测量精度虽可达10-6RI，但存在对系统光学器件进行精密调控的操作要求。
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Abstract
The application claims a liquid refractive index high-precision measurement method based on optical autocollimation, and belongs to the field of optical measurement instruments, and the steps comprise: step 1, according to the angle measurement principle of a traditional autocollimator, a liquid loading reflector with a trapezoidal slope cavity structure characteristic is preliminarily designed, and the cavity is used to replace an external plane reflection target mirror for transmitting an angle value of a traditional autocollimator system, so that a solution refractive index measurement system in the cavity is formed; step 2, according to the original angle measurement performance of the autocollimator system, combined with the change range of the solution refractive index to be measured, a cavity reflector structure geometric parameter calculation and a design method derivation are performed; and step 3, according to the cavity geometric structure parameters, combined with an autocollimator angle measurement formula, a relationship formula between the autocollimation measurement value and the solution refractive index is established. The system structure is relatively simple and convenient to operate, and therefore is more conducive to the popularization and application in the solution refractive index measurement field.
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Citation Information
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