Silicon Monoxide Protected Front Surface Mirrors
Abstract
This report covers studies of the structure and properties of evaporated thin films of aluminum and silver, and describes a simple, high- vacuum evaporation process for producing high-reflecting front-surface mirrors with durable protective films of silicon monoxide. The report concludes that front-surface mirrors are necessary whenever maximum reflectivity and/or highly precise control of optical reflections is required, that silicon monoxide protected front-surface mirrors with aluminum reflecting surfaces on glass bases have good abrasion, corrosion, and thermal shock characteristics which make them particularly suitable for use in military equipment under all climatic conditions; that silicon monoxide protected front-surface mirrors with aluminum reflecting surfaces on glass bases have reflectivities in the visible and infrared not significantly lower than those of the unprotected metal but absorb in the ultraviolet; and that silicon monoxide protected front-surface mirrors are much superior in corrosion resistance to magnesium fluoride protected front- surface mirrors.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 13, 1947
- Accession Number
- ADA954089
Entities
People
- G. H. Hass
- N. W. Scott
Organizations
- United States Army Engineer Research and Development Laboratory