找几篇外文文献（opt.eng等）
我这里数据库资源有限，谁能给帮帮忙找找下面几篇文章啊，能找几个算几个，万分感激了 1. M. C. Gerchman and G. C. Hunter, “Differential technique for accurately measuring the radius of curvature of long radius concave optical surfaces,” Opt. Eng. 19, 843–848 (1980). Iq ci}G%r
2. M. V. R. K. Murty and R. P. Shula, “Measurement of long radius of curvature,” Opt. Eng. 22, 231–235 ~1983!. ;@ *<M\O
3．U. Griesmann, J. Soons, and Q. Wang, “Measuring form and radius of spheres with interferometry,” Ann. CIRP 53, 451– 454 (2004). 4. K. M. Medicus, “Improving measurements based on the cat’s eye retro-reflection,” Ph.D. dissertation (University of North Carolina at Charlotte, 2006). H;seT XL
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