1. Brinksmeier E, Glaeble R, Osmer J (2011) Surface integrity demands of high precision optical molds and realization by a new process chain. Procedia Eng 19:40–43
2. (1974) Method for molding glass lenses, patent No. US 383 334 7
3. (1980) Press molding method for thick optical glass molding, patent No. JP 550 628 15
4. Ma KJ, Chien HH, Chuan WH, Chao CL, Hwang KC (2008) Design of protective coatings for glass lens molding. Trans Tech Publications, Switzerland
5. US Patent 4606750, Mold for direct press molding of optical glass element. Matsushita Electric Industrial Co., Ltd, Aug. 19, 1986