Diazo Printing Lamphouse.
Abstract
This report describes the research and development work performed on improved light sources and a lamphouse for imaging diazo reproduction materials, Previously, mercury-vapor arc lamps dosed with metal halides were developed to improve spectral efficacy and, thereby, permit the attainment of higher printing speeds and/or lower power requirements. Under this program the spectral efficacy of these lamps was improved further by forcibly cooling the lamps so that higher wall loadings could be achieved. Calorimeter tests with the developed lamphouse indicate that now more than 2400 watts of actinic radiation can be directed through a 10-inch square aperture from a lamp which consumes 7000 watts of electrical power. From these results and an evaluation of synthetic sapphire, it is concluded that further improvements are unlikely unless a reliable technique is devised for obtaining the emission spectra of chromium from an arc lamp. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1973
- Accession Number
- AD0908715
Entities
People
- Robert A. Bambenek
- Walter J. Jasionowski