Robust Fixed-Wavelength Laser Eye Protection
Abstract
The objective of this work was to develop the technology for depositing a dielectric narrow-band reflector on thin glass foil without unmanageable stress and bond this filter face-in to a cylindrically curved polycarbonate substrate to form an environmentally durable laminated visor. A dielectric coating that blocked three laser wavelengths (532 nm, 694 nm, and 1064 mn) was applied to paper- thin glass foil. Methods were developed for cementing this glass filter to the polycarbonate insert for the Sun, Wind and Dust Goggle, and trimming away the excess glass foil. In every case, the bonded glass film cracked and separated from the polycarbonate substrate. Failure analysis performed on the fractured glass indicated that the primary mechanism of failure involved microfractures at the glass edge. Several methods were used to prevent their formation or inhibit their growth, without success. The effort to construct the visor was unsuccessful.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1994
- Accession Number
- ADA294398
Entities
People
- Edward M. Healy
- Nick Lawrence
- Oliver Edwards