The Effectiveness of Plastic Focussing Lenses with High-Intensity Ultrasonic Radiation.
Abstract
An investigation of the behavior of Plexiglas and Polystyrene lenses as focussing devices for ultrasonic radiation is described. A fixed frequency of 1 megacycle/second and intensities up to 6.6 W/sq cm were employed. Using a thermocouple probe to obtain records of intensity of radiation in a water tank, it was found that at about 2 W/sq cm the Plexiglas showed signs of physical breakdown. Up to the maximum intensities employed, Polystyrene showed no indication of damage, while at 6.6 W/sq cm the Plexiglas developed internal cavities near the outer edge of the lens, where the thickness was 4 mm.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1952
- Accession Number
- AD0495667
Entities
People
- John Maxwell Anderson
- Joseph A. Bronzo
Organizations
- Brown University