Rain impact testing of durable coatings on water-clear ZnS

John A. Detrio

doi:10.1117/12.130801

14 December 1992 Rain impact testing of durable coatings on water-clear ZnS

John A. Detrio

Proceedings Volume 1760, Window and Dome Technologies and Materials III; (1992) https://doi.org/10.1117/12.130801
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Quantitative measurements of the influence of high-speed rain impact damage on uncoated water clear ZnS as a function of velocity and impact exposure were made using Nomarski microscopy, total integrated scattering, integrated spectral transmission and equibiaxial flexural testing. The rotating arm tests assessed the response of the material to nominal 2 mm diameter drops at normal incidence. The measure of drop exposure selected for these studies was the density of drop impacts expected to strike the specimen for the test conditions (rain rate, velocity, run time, and spatial distribution of drops). The expected exposure is compared to measurements on PMMA calibration specimens. The influence of high durability coatings on the water clear ZnS was assessed using the same characterization methods. The limitations imposed by statistical variability illustrate the difficulty of comparisons made without adequate control of the parameters.

Citation Download Citation

John A. Detrio "Rain impact testing of durable coatings on water-clear ZnS", Proc. SPIE 1760, Window and Dome Technologies and Materials III, (14 December 1992); https://doi.org/10.1117/12.130801

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available