Abstract
Microhardness testing was evaluated and compared to abrasion testing for a variety of optical coatings. The microhardness testers were used for both microhardness and scratch testing. The thin dielectric optical coatings required very light deadweight loads (2–50 g), low background vibration levels, and, to minimize penetration depth, the use of Knoop diamond indentors. In addition to single layer films of TiO2, a variety of good and bad (as determined by eraser rub testing) multilayer coating products were used in this comparison. In all cases the microhardness tester confirmed the ranking of the eraser rub tests. However, not only was microhardness testing more quantitative and less subjective, but it was also able in many cases to distinguish between hardness and adhesion failures. In addition, microhardness tests showed some promise for predicting the cutting yields on uncoated flat glass substrates.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
