Phase-object detection by use of double-exposure fringe-modulated speckle patterns
We study the properties of a double-exposure image specklegram of a diffuse object obtained by use of a doubleaperture pupil. A phase object is placed in front of one aperture during the first or the second exposure. Also, it is assumed that a uniform displacement of the diffuser between exposures i...
- Autores:
-
Tebaldi, Myrian
Trivi, Marcelo
Bolognini, Néstor
Angel-Toro, Luciano
Tebaldi, Myrian
Trivi, Marcelo
Bolognini, Néstor
Angel-Toro, Luciano
- Tipo de recurso:
- Fecha de publicación:
- 2003
- Institución:
- Universidad EAFIT
- Repositorio:
- Repositorio EAFIT
- Idioma:
- eng
- OAI Identifier:
- oai:repository.eafit.edu.co:10784/1368
- Acceso en línea:
- http://hdl.handle.net/10784/1368
- Palabra clave:
- speckle patterns
double-exposure image specklegram
multiaperture pupil
phase-object detection
- Rights
- License
- Acceso cerrado
| Summary: | We study the properties of a double-exposure image specklegram of a diffuse object obtained by use of a doubleaperture pupil. A phase object is placed in front of one aperture during the first or the second exposure. Also, it is assumed that a uniform displacement of the diffuser between exposures is produced. The recorded specklegram is coherently illuminated and analyzed by Fourier transform operations. The average intensity distribution and the interference fringe visibility in the Fourier plane are investigated. On this basis, an alternative interference technique to detect phase objects is proposed. |
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