[1] Oikawa M., Iga K., Sanada T. et al.. Array of distributed-index planar micro-lenses prepared from ion exchange technique. Japan J. Appl. Phys., 1981, 20(4): L296～L298

[2] Borrelli N. F., Morse D. L., Bellman R. H. et al.. Photolytic technique for producing microlenses in photosensitive glass. Appl. Opt., 1985, 24(16): 2520～2525

[3] Lee K. S., Bames F. S.. Microlenses on the end of single-mode optical fibers for laser applications. Appl. Opt., 1985, 24(19): 3134～3139

[4] Kubo M, Hanabusa M. Fabrication of microlenses by laser chemical vapor deposition. Appl. Opt., 1990, 29(18): 2755～2759