CN2795850Y - 便携式激光水晶鉴别器 - Google Patents

便携式激光水晶鉴别器 Download PDF

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CN2795850Y
CN2795850Y CN 200520058328 CN200520058328U CN2795850Y CN 2795850 Y CN2795850 Y CN 2795850Y CN 200520058328 CN200520058328 CN 200520058328 CN 200520058328 U CN200520058328 U CN 200520058328U CN 2795850 Y CN2795850 Y CN 2795850Y
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王钢
沈韩
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Sun Yat Sen University
National Sun Yat Sen University
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National Sun Yat Sen University
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Abstract

本实用新型涉及一种鉴别水晶真伪的光学仪器。本便携式激光水晶鉴别器由激光器、扩束器、散光片、起偏器、检测台、检偏器和放大镜构成,检偏器可旋转,使透光轴与起偏器透光轴垂直或平行。本实用新型装置的特点是用激光代替白光,使干涉光程差变大,同时采用放大镜观察,使白光无法分辨的仿水晶分辨得一清二楚。该便携式激光水晶鉴别器采用的半导体激光器(用钮扣电池)、底座、和放大镜都是轻便构件,总重量约0.2千克,实行一体化装配,携带方便,检测准确,可用于水晶首饰的检测。

Description

便携式激光水晶鉴别器
技术领域
本实用新型涉及一种偏振激光鉴别水晶的光学仪器。
背景技术
现有的偏振光水晶辨别器采用白光作光源,有两偏振片,待测件放在两偏振片之间观察。由于通常检测的首饰所用水晶一般厚度较大,用白光偏光观察时,各种颜色的光由于折射率不同互相叠加成白光,此白光为高次白干涉现象。它与仿水晶产生的低次白干涉现象很难分辨。仿水晶为拉伸过的玻璃。
水晶是二氧化硅单晶,又称石英结晶体,分子排列远程有序,硬度比玻璃高。珠宝界常用水晶材料加工成项链、手链、和坠子等饰物,款式多样,高贵典雅。有些人为谋取高利润,以玻璃制品冒充水晶欺骗顾客。如何方便快捷准确检测水晶的真伪成为一道难题。
发明内容
本实用新型的目的是提供一种便携式激光水晶鉴别器,用光学无损伤检测方法,准确鉴别水晶的真伪。
本实用新型由激光器、扩束器、散光片、起偏器、检测台、检偏器和放大镜构成,这些处于同一光轴上,并依次固定在连接支架上,检偏器可旋转,起偏器和检偏器光轴垂直或平行。放大镜焦距可调节,使成像清晰。整个系统由底座和支架连接。
本实用新型装置的特点是采用1毫瓦左右的半导体激光器,单色激光通过扩束器和起偏器后,成为散射的偏振光照到被测水晶制品上,通过附有检偏器的放大镜观察。水晶制品有清晰密集的干涉条纹,非水晶制品则没有干涉条纹。普通玻璃或有机玻璃光各向同性,没有双折射,放到测量光场中旋转,光强没变化;通过加热拉伸后变成光各向异性,有双折射,放到测量光场中可看到光强变化。用白光观察,其现象与水晶类似,无法分辨。但水晶的分子排列是远程有序,双折射率比拉伸过的玻璃大得多,若用单色的激光观察能看到密集的干涉条纹,拉伸过的玻璃则没有干涉条纹,因此能准确地分辨水晶的真伪。
附图说明
图1是便携式激光水晶鉴别器的仪器机构示意图。
图2是用图1所示便携式激光水晶鉴别器观察水晶球时的干涉图。
图3是用图1所示便携式激光水晶鉴别器观察小水晶八棱柱时的干涉图。
图1中,1为激光器,2为扩束器,3为散光片,4为起偏器,5为检测台,6为检偏器,7为放大镜。这些处于同一光轴上,并依次固定在连接支架上,检偏器可旋转,起偏器和检偏器光轴垂直或平行。放大镜焦距可调节,使成像清晰。整个系统由底座和支架连接。
图2中,水晶的分子排列是远程有序,双折射率比拉伸过的玻璃大得多,若用单色的激光观察能看到密集的干涉条纹,拉伸过的玻璃则没有干涉条纹,因此能准确地分辨水晶的真伪。

Claims (3)

1、一种便携式激光水晶鉴别器,其特征是该便携式激光水晶鉴别器由激光器、扩束器、散光片、起偏器、载物台、检偏器构成,它们处于同一光轴上,并依次固定在连接支架上,检偏器可旋转,起偏器和检偏器光轴垂直或平行。
2、一种如权利要求1所述的便携式激光水晶鉴别器,其特征是在检偏器后面加上观察干涉图案的放大镜。
3、一种如权利要求1所述的便携式激光水晶鉴别器,其特征是所述的散光片为毛玻璃、乳白有机玻璃、或描图纸。
CN 200520058328 2005-05-19 2005-05-19 便携式激光水晶鉴别器 Expired - Fee Related CN2795850Y (zh)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110031431A (zh) * 2019-04-01 2019-07-19 诸暨市和冬水晶有限公司 一种鉴定水晶的测试笔
CN111316089A (zh) * 2018-10-19 2020-06-19 合刃科技(深圳)有限公司 微流控芯片管道的检测装置、方法及系统
CN113552135A (zh) * 2021-07-19 2021-10-26 北京石晶光电科技股份有限公司 一种人造光学水晶包裹体检测装置及方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111316089A (zh) * 2018-10-19 2020-06-19 合刃科技(深圳)有限公司 微流控芯片管道的检测装置、方法及系统
CN110031431A (zh) * 2019-04-01 2019-07-19 诸暨市和冬水晶有限公司 一种鉴定水晶的测试笔
CN113552135A (zh) * 2021-07-19 2021-10-26 北京石晶光电科技股份有限公司 一种人造光学水晶包裹体检测装置及方法

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Granted publication date: 20060712