Investigation of shrinkage and cracking of ophthalmic lens coating by a cycle test of UV radiation and high humidity |
| |
Authors: | N Tadokoro K JaisupapA Sukbumperng S PannakarnS Khraikratoke P JamnongpianN Iwata |
| |
Affiliation: | a Technical Research & Development Institute, VC company, HOYA Corporation, 37 Satukigaoka, Minakuchi-cho, Kouka-shi, Shiga 528-0062, Japanb PL Technical Department, HOYA Lens Thailand, 202 Moo1, Banwah (Hi-Tech) Industrial Estate (Epz), Banlane, Bang Pa-in, Ayutthaya 13160, Thailand |
| |
Abstract: | This paper presents some ophthalmic lens coating failures such as shrinkage, cracking, and cracking with delamination caused by UV radiation, elevated temperature, and moisture. These phenomena are caused by: 1) interactions at the interface between the plastic substrate and the hard coating (HC), and 2) plastic deformation with stress and relaxation of the HC/substrate interface. This phenomenon leads to an understanding of the mechanical properties of ophthalmic lenses through a QUV test which is found to be a useful method in developing better ophthalmic lens systems. The coating failures were investigated by means of different analysis techniques including optical microscope, scanning electron microscope, atomic force microscope, thermo mechanical analysis, and dynamic secondary ion mass spectrometry. |
| |
Keywords: | QUV test Ophthalmic lens Cracking Shrinkage Deformation |
本文献已被 ScienceDirect 等数据库收录! |
|