ADDITIONAL CANDLEPOWER TESTS OF 300-MILLIMETER, CLOSED-TOP, DRUM LENSES
Abstract
This report describes photometric tests of U. S. Coast Guard Type 1954, 300-millimeter, pressedglass closed-top drum lenses. Lens-to-lamp ratios with a 6.2-volt 0.46 ampere marine signal lamp are given for five randomly selected lenses. For the same five lenses the mean horizontal beam candlepower is given with five of each of the following marine signal lamps: 12-volt, 0.77 ampere; 12-volt, 2.03 ampere; and 12-volt, 3.05 ampere. The effects of lens and lamp variations on performance are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 23, 1960
- Accession Number
- AD0265109
Entities
People
- P.o. Chapman
Organizations
- United States Coast Guard