Noncoherent optical processing
Abstract
Noncoherent or partially coherent optical processing systems may be developed by application of the Zerniker-Van Cittert theorem to coherent systems operating on objects which do not introduce phase changes on the coherent beams passing through them. This line of noncoherent optical processing development has yielded devices such as entrance pupil filters and spatial frequency filters. Optical processing which makes use of the heavy redundancy of noncoherent systems is also mentioned, and attention is given to the addition of d.c. bias to noncoherent systems, a technique which permits treatment of negative numbers, though at the cost of decreased image contrast. A noncoherent optical character reader, a high-speed motion photography system, and a device to measure the optical transfer function of a lens are described.
- Publication:
-
New York
- Pub Date:
- 1977
- Bibcode:
- 1977wi...book.....R
- Keywords:
-
- Image Processing;
- Incoherence;
- Optical Data Processing;
- Signal Processing;
- Systems Engineering;
- Cinematography;
- Fourier Transformation;
- Light Modulation;
- Optical Filters;
- Optical Transfer Function;
- Phase Coherence;
- Redundant Components;
- Reliability Engineering;
- Spatial Filtering;
- Instrumentation and Photography