Use of Polarization of Light Filters in Aerial Photographic Sea Surveys.
Abstract
Aerial photographic surveys of the surface of the sea are being performed to investigate sea waves and to map currents. For these reasons, the struggle against errors occuring in aerial photographic surveys of seas and oceans assumes considerable importance. Among such serious errors is the image of the 'sun spots', that is, the mirror reflection, on the aerial photographic film, of the sun light striking the surface of the water, and the sharp increase in light dissipation within the objective of the aerial camera, resulting from the intense brightness of the sun spot; this results in an excess of light on the portion of the aerial photograph that is opposite the spot image. The theory and methodology for reduction of these errors with the aid of polarized light filters (polaroids) are presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1962
- Accession Number
- AD0290557
Entities
People
- A. M. Kuzina
- I. V. Semenchenko
- N. S. Ramm
Organizations
- United States Army Engineer Research and Development Laboratory