APPLIED RESEARCH ON TECHNIQUES FOR LIGHT MODULATION DETECTION
Abstract
The relative advantages of convergent flow gun and linear flow gun traveling-wave phototubes are discussed. Convergent flow guns are preferable in the following two situations, where it is assumed that the light signal is collected and focused onto the photocathode by a telescope of some kind: (1) The light source is not a point and the image is larger than the photocathode, in this case the receiver sensitivity is proportional to the cathode area; (2) The light sources is effectively a point, e.g., a laser source, in this case the image may be smaller than the cathode, but the larger the photocathode, the less directional is the receiver - an important consideration when the source and receiver cannot be perfectly aligned, and atmospheric effects cause virtual motion of the source. Satellite telemetry, and laser range finding systems are typical examples of this situation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1963
- Accession Number
- AD0406933
Entities
People
- S. E. Sobottka
Organizations
- Watkins-Johnson Company