Test images of a sector star versus radial and axial merit functions
The radial and axial point spread function (PSF) and the 3D modulation transfer function (MTF) were calculated to demonstrate the influence of phase only filters in classical optical imaging systems. The 3D line spread function (LSF) makes it possible to discuss the influence of the degree of cohere...
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2008
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0277786X_v7102_n_p_Hild http://hdl.handle.net/20.500.12110/paper_0277786X_v7102_n_p_Hild |
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paper:paper_0277786X_v7102_n_p_Hild |
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paper:paper_0277786X_v7102_n_p_Hild2023-06-08T15:26:31Z Test images of a sector star versus radial and axial merit functions Diffractive optics Optical imaging theory Optical merit functions Optical system design Spatial light modulators Diffractive optics Digital image storage Functions Imaging systems Light Light modulation Liquid membranes Modulation Modulators Optical filters Optical image storage Optical systems Optical transfer function Optoelectronic devices Phase shift Photolithography Probability density function Three dimensional Wave filters Axial points D lines Degree of coherences In dependences Merit functions Modulation Transfer functions Optical imaging systems Optical imaging theory Optical merit functions Optical system design Optimum filters Phase only filters Phase shifting Phase variations Spatial light modulators Spread functions Test images Light modulators The radial and axial point spread function (PSF) and the 3D modulation transfer function (MTF) were calculated to demonstrate the influence of phase only filters in classical optical imaging systems. The 3D line spread function (LSF) makes it possible to discuss the influence of the degree of coherence in the optical imaging system with the phase only filter as well. First, the phase only filter under discussion was divided in five equally area annuli. The phase variations are either linearly increasing or decreasing with the annulus number or alternating between 0 and π. Second we have used a filter that consists on one phase annulus with a phase shift of π in different positions over the pupil. Numerical and experimental results are shown in this paper. A spatial light modulator (SLM) was used to obtain experimentally the influence of the different phase only filters on the image of a sector star. The merit functions for filters with a phase shift of π in one annulus are also studied. These filters produce a wide variety of responses in dependence of the position of the phase shifting annulus. By studying the merit functions, a clear prediction of the imaging behaviour of an optical system is possible as well. The conclusion of our work has been that it is necessary to study the influence of the filter on the different merit functions in order to design an optimum filter for a given application. © 2008 SPIE. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0277786X_v7102_n_p_Hild http://hdl.handle.net/20.500.12110/paper_0277786X_v7102_n_p_Hild |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Diffractive optics Optical imaging theory Optical merit functions Optical system design Spatial light modulators Diffractive optics Digital image storage Functions Imaging systems Light Light modulation Liquid membranes Modulation Modulators Optical filters Optical image storage Optical systems Optical transfer function Optoelectronic devices Phase shift Photolithography Probability density function Three dimensional Wave filters Axial points D lines Degree of coherences In dependences Merit functions Modulation Transfer functions Optical imaging systems Optical imaging theory Optical merit functions Optical system design Optimum filters Phase only filters Phase shifting Phase variations Spatial light modulators Spread functions Test images Light modulators |
| spellingShingle |
Diffractive optics Optical imaging theory Optical merit functions Optical system design Spatial light modulators Diffractive optics Digital image storage Functions Imaging systems Light Light modulation Liquid membranes Modulation Modulators Optical filters Optical image storage Optical systems Optical transfer function Optoelectronic devices Phase shift Photolithography Probability density function Three dimensional Wave filters Axial points D lines Degree of coherences In dependences Merit functions Modulation Transfer functions Optical imaging systems Optical imaging theory Optical merit functions Optical system design Optimum filters Phase only filters Phase shifting Phase variations Spatial light modulators Spread functions Test images Light modulators Test images of a sector star versus radial and axial merit functions |
| topic_facet |
Diffractive optics Optical imaging theory Optical merit functions Optical system design Spatial light modulators Diffractive optics Digital image storage Functions Imaging systems Light Light modulation Liquid membranes Modulation Modulators Optical filters Optical image storage Optical systems Optical transfer function Optoelectronic devices Phase shift Photolithography Probability density function Three dimensional Wave filters Axial points D lines Degree of coherences In dependences Merit functions Modulation Transfer functions Optical imaging systems Optical imaging theory Optical merit functions Optical system design Optimum filters Phase only filters Phase shifting Phase variations Spatial light modulators Spread functions Test images Light modulators |
| description |
The radial and axial point spread function (PSF) and the 3D modulation transfer function (MTF) were calculated to demonstrate the influence of phase only filters in classical optical imaging systems. The 3D line spread function (LSF) makes it possible to discuss the influence of the degree of coherence in the optical imaging system with the phase only filter as well. First, the phase only filter under discussion was divided in five equally area annuli. The phase variations are either linearly increasing or decreasing with the annulus number or alternating between 0 and π. Second we have used a filter that consists on one phase annulus with a phase shift of π in different positions over the pupil. Numerical and experimental results are shown in this paper. A spatial light modulator (SLM) was used to obtain experimentally the influence of the different phase only filters on the image of a sector star. The merit functions for filters with a phase shift of π in one annulus are also studied. These filters produce a wide variety of responses in dependence of the position of the phase shifting annulus. By studying the merit functions, a clear prediction of the imaging behaviour of an optical system is possible as well. The conclusion of our work has been that it is necessary to study the influence of the filter on the different merit functions in order to design an optimum filter for a given application. © 2008 SPIE. |
| title |
Test images of a sector star versus radial and axial merit functions |
| title_short |
Test images of a sector star versus radial and axial merit functions |
| title_full |
Test images of a sector star versus radial and axial merit functions |
| title_fullStr |
Test images of a sector star versus radial and axial merit functions |
| title_full_unstemmed |
Test images of a sector star versus radial and axial merit functions |
| title_sort |
test images of a sector star versus radial and axial merit functions |
| publishDate |
2008 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0277786X_v7102_n_p_Hild http://hdl.handle.net/20.500.12110/paper_0277786X_v7102_n_p_Hild |
| _version_ |
1768543034439368704 |