光学玻璃应力的自动测试何勇.pdfVIP

33 3 V o.l 33 No. 3 2005 6 GLA SS ENAMEL Jun. 2005 * ** *** 何 勇 , 王娉婷 朱日宏, 沈 华 (, 210094) : 根据 1/ 4波片法测量应力的特点, 采用光电编码器控制 偏器的旋转高分辨率且无自动 增益功能的 CCD, 由计算机控制并采集光学玻璃干涉条纹图, 采样点根据需要可多达 512 @ 512 介绍应力图分析软件的设计思路, 编制软件对多幅干涉条纹图进行处理与计算, 得到被测样品所 有点的应力值, 并绘制样品应力三维分布图采用 CYY - 1应力仪进行实验, 实验表明, 应力双 折射光程差测量精度达 0. 2nm / cm, 重复性为 0. 1nm / cm, 并实现全测试过程的自动化和智能化 : 光学玻璃; 应力; 测试; 图像处理 + : TQ 171. 1 12 : A : 1000 - 2871( 2005) 0 3- 0040- 04 Autotesting of the Optical G lass Stress H E Yong, WAN G P ing - ting, ZH U R i- h ong, SH EN H ua ( Inst tute of E lectron c Eng neer ng O pto- E lectr c T echnology, N anj ng U n ve rs ty o f Sc ence T echno logy, N anj ng 2 10094, Ch na) Ab stract: Based upon fundam ental g lass stress test ng pr nc ple of 1/ 4 w ave p late m ethod ang les are contro led by Pho toelectr c Encoder. The CCD w h ch has a h gh reso lut on and w thout autom at c ga n has been app l ed. A nd the grab of opt ca l g lass stress pattern w h ch represents the d fferent ang les stress s controlled by com puter. T he sam pl ng po nts can be as m any as 512 @ 512 f requ red. So ftw are based on the platform o f w ndow s 9 8 m plem ents nterferog ram sam p l ng and process ng . A t the sam e t m e the compu ter draw s a 3D m age o f the stress d str but on. By the experm ent at CYY - 1, ts results show that the prec s on s be