基于无衍射栅型结构光投影的角膜轮廓测量  

Corneal Contour Measurement Based on Non-Diffracting Grating Structure Light Projection

作　　者：周莉萍[1] 干江红[1] 徐龙[1] 

机构地区：[1]华中科技大学机械科学与工程学院,湖北武汉430074

出　　处：《中国激光》2013年第3期175-178,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金(50975112)资助课题

摘　　要：角膜轮廓测量在眼科学上有重要意义,但角膜的高通光率增加了其测量难度。根据角膜生物特性,结合无衍射栅型结构光条纹投影测量的优点,通过对角膜表面涂覆荧光素的方法实现角膜表面轮廓测量。介绍了无衍射栅型结构光条纹投影系统测量模型,角膜表面轮廓测量实验设计。搭建测量平台对涂有荧光素的兔眼角膜进行了测量,并观察了眼压升高引起兔眼角膜的变形现象。实验结果表明,利用无衍射栅型结构光投影可以实现角膜表面轮廓测量,验证了通过测量角膜表面轮廓曲率半径变化实现眼内压力非接触测量的可行性。Corneal contour measurement has significant meaning in ophthalmology, but it is difficult because of high transmittance of cornea. According to the characteristics of cornea and by taking advantage of non-diffracting grating structure light projection system, the contour of corneal surface coated with fluorescein is measured. A model of nondiffracting grating structure light projection system is proposed and experiment of corneal surface contour measurement is designed. A measurement platform is set to realize rabbit corneal contour measurement, and corneal deforming phenomenon caused by increasing intraocular pressure is observed. Experimental result shows that the corneal contour can be measured precisely by non-diffracting grating projection system. Feasibility of intraocular pressure measurement according to variation of corneal contour curvature is validated.

关 键 词：测量 无衍射栅型结构光 角膜轮廓测量 投影测量 眼压 荧光 

分 类 号：TN247[电子电信—物理电子学]