Grating Interferometric Sensors.
Abstract
A new class of grating-based interferometric sensors are introduced for target discrimination, detection and passive synthetic aperture imaging. It is shown that the grating-based interferometric sensors provides superior system sensitivity and flexibility. Several design approaches and operating modes of the grating interferometric sensors are presented and experiments demonstrating the proposed system concepts are described. We have examined the uses of a grating interferometer for passive synthetic aperture imaging to achieve imaging resolution beyond that permitted by the collection aperture and as a moving target sensor to detect the presence of moving targets that are too small to be resolved. We have shown that the achromaticity of the grating interferometer allows the use of a wider instantaneous spectral bandwidth which in turn provides a better system sensitivity than conventional systems. In addition, the grating interferometer offers a simple means to achieve two-dimensional aperture fill and it is more tolerant to system vibration.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1986
- Accession Number
- ADA165593
Entities
People
- Anthony M. Tai
Organizations
- Environmental Research Institute of Michigan