Abstract
Ophthalmic resin lenses are widely used to correct myopia and defend harmful light waves. Ophthalmic lens with anti-reflective (AR) coating has become the mainstream product in the lens market. The AR coating is composed by inorganic metal oxides, which is very different to the organic lens substrate in thermal expansion coefficients. In a normal wearing environment, coating delaminating often occurs resulting that AR function is disabled. How to evaluate adhesion of the AR coating is important. In this paper, a specially designed cutting tool was used to scratch two grids on each surface of the lens. The peel off operation was carried out with the tape within specified adhesion range. The coating detachment was evaluated by visual inspection and microscopy based on the methods defined in ISO 2409 and GB 10810.4, the applicability was compared and discussed.
Highlights
The vital role of the eye is to create the external world image
By destructive interference between the light waves reflected from the surfaces and interfaces of thin films, an AR coating reduces the reflected light intensity for better transparency as well as vision [9]
The vast majority of commercial AR coatings on ophthalmic lenses are produced by physical vapor deposition (PVD) techniques [10,11]
Summary
Xin Zhang 1,† , Wei Ma 2,† , Songjin Zhang 3 , Hongliang Huang 1 , Liu Ouyang 3 , Wei Peng 2 , Jiayi Ye 1, * and Cheng Chen 4,5, *. Research Center of Resource Recycling Science and Engineering, Shanghai Polytechnic University, Shanghai 201209, China. Received: 19 September 2020; Accepted: 10 October 2020; Published: 14 October 2020
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