Accession Number:

ADA954089

Title:

Silicon Monoxide Protected Front Surface Mirrors

Descriptive Note:

Corporate Author:

ARMY ENGINEER RESEARCH AND DEVELOPMENT LABS FORT BELVOIR VA

Personal Author(s):

Report Date:

1947-10-13

Pagination or Media Count:

37.0

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 andor 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.

Subject Categories:

  • Optical Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE