FOCUSING DEVICES FOR SEARCHLIGHT BEACONS.
Abstract
Two focusing devices, operating on the pinhole camera principle, were used to focus 24-in. and 36-in. searchlight beacons presently being used in Charleston Lighthouse. Using these devices a collimated, horizontal beam was obtained from each beacon. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 09, 1966
- Accession Number
- AD0481934
Entities
People
- D. A. Naus