PHOTOELECTRIC IMAGING DEVICES FOR ASTRONOMY.
Abstract
In this paper current techniques used in sensitive photoelectric imaging devices are investigated. An ideal imaging device is defined in terms of parameters that are directly related to the properties of a real device. Characteristics of a real device such as resolution, detectivity, and quantum efficiency are discussed in terms of basic device construction. The design of several types of image tubes that have found applications in astronomy are discussed in detail. The tubes are compared with regard to several performance parameters including resolution, detectivity, and information capacity. Some attempt is also made to consider such practical aspects as cost, complexity, and availability. Several specific experiments are described that were performed on one of the image tubes discussed--the secondary electron conduction tube. Finally, a concise summary of the present status of image devices for astronomy is given and some prospects for future improvements are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1968
- Accession Number
- AD0685200
Entities
People
- Robert C. Beal
Organizations
- Johns Hopkins University Applied Physics Laboratory