Optimization of liquid crystal displays behavior in optical image processing and in diffractive optics
In this paper we will revise the application of twisted nematic liquid crystal displays (TN-LCD) as spatial light modulators (SLM) for image processing and diffractive optics. In general two kind of responses are desired for the mentioned applications: amplitude-only and phase-only modulation. In ge...
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2001
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0277786X_v81CR_n_p335_Campos http://hdl.handle.net/20.500.12110/paper_0277786X_v81CR_n_p335_Campos |
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paper:paper_0277786X_v81CR_n_p335_Campos2023-06-08T15:26:36Z Optimization of liquid crystal displays behavior in optical image processing and in diffractive optics Amplitude-only modulation Correlation Diffractive optical elements Liquid crystal displays Optical pattern recognition Phase-only modulation Programmable apodizers Spatial light modulators Amplitude modulation Diffractive optics Eigenvalues and eigenfunctions Image analysis Light modulation Light polarization Light transmission Mathematical models Nematic liquid crystals Optical character recognition Optical correlation Optical filters Optimization Phase modulation Quantum optics Reverse engineering Correlation methods Density (optical) Diffractive optical elements Geometrical optics Image processing Information systems Light Light modulation Light transmission Liquid crystal displays Liquids Modulation Nematic liquid crystals Optical correlation Optical data processing Optical properties Pattern recognition Reverse engineering Amplitude-only modulation Optical image processing Optical pattern recognition Phase-only modulation Programmable apodizers Liquid crystal displays Light modulators Apodizers Intensity measurements Optical image processing Optical pattern recognition Phase-only modulation Physical parameters Spatial light modulators Twisted nematic-liquid crystal displays In this paper we will revise the application of twisted nematic liquid crystal displays (TN-LCD) as spatial light modulators (SLM) for image processing and diffractive optics. In general two kind of responses are desired for the mentioned applications: amplitude-only and phase-only modulation. In general the users of commercially available LCDs do not know the optical properties of the used material. Thus, a reverse-engineering approach is needed to optimize the LCD response. First, we show a simplified model, that we recently proposed, for the orientation of the LC molecules. The model allows the determination of the physical parameters of the LCD by means of simple intensity measurements. Second, we demonstrate the capability of the model to provide very accurate predictions of the optical transmission. Therefore, we can perform computer searches for the optimum orientation of the added polarizing elements to obtain the required optical transmission. We demonstrate the need to insert wave plates in front and behind the LCD to obtain either amplitude-only or phase-only regimes with the LCD. Finally, we show the application of the optimized LCD to display images and filters in optical image processing, as well as we show the design of diffractive optical elements and apodizers. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0277786X_v81CR_n_p335_Campos http://hdl.handle.net/20.500.12110/paper_0277786X_v81CR_n_p335_Campos |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Amplitude-only modulation Correlation Diffractive optical elements Liquid crystal displays Optical pattern recognition Phase-only modulation Programmable apodizers Spatial light modulators Amplitude modulation Diffractive optics Eigenvalues and eigenfunctions Image analysis Light modulation Light polarization Light transmission Mathematical models Nematic liquid crystals Optical character recognition Optical correlation Optical filters Optimization Phase modulation Quantum optics Reverse engineering Correlation methods Density (optical) Diffractive optical elements Geometrical optics Image processing Information systems Light Light modulation Light transmission Liquid crystal displays Liquids Modulation Nematic liquid crystals Optical correlation Optical data processing Optical properties Pattern recognition Reverse engineering Amplitude-only modulation Optical image processing Optical pattern recognition Phase-only modulation Programmable apodizers Liquid crystal displays Light modulators Apodizers Intensity measurements Optical image processing Optical pattern recognition Phase-only modulation Physical parameters Spatial light modulators Twisted nematic-liquid crystal displays |
| spellingShingle |
Amplitude-only modulation Correlation Diffractive optical elements Liquid crystal displays Optical pattern recognition Phase-only modulation Programmable apodizers Spatial light modulators Amplitude modulation Diffractive optics Eigenvalues and eigenfunctions Image analysis Light modulation Light polarization Light transmission Mathematical models Nematic liquid crystals Optical character recognition Optical correlation Optical filters Optimization Phase modulation Quantum optics Reverse engineering Correlation methods Density (optical) Diffractive optical elements Geometrical optics Image processing Information systems Light Light modulation Light transmission Liquid crystal displays Liquids Modulation Nematic liquid crystals Optical correlation Optical data processing Optical properties Pattern recognition Reverse engineering Amplitude-only modulation Optical image processing Optical pattern recognition Phase-only modulation Programmable apodizers Liquid crystal displays Light modulators Apodizers Intensity measurements Optical image processing Optical pattern recognition Phase-only modulation Physical parameters Spatial light modulators Twisted nematic-liquid crystal displays Optimization of liquid crystal displays behavior in optical image processing and in diffractive optics |
| topic_facet |
Amplitude-only modulation Correlation Diffractive optical elements Liquid crystal displays Optical pattern recognition Phase-only modulation Programmable apodizers Spatial light modulators Amplitude modulation Diffractive optics Eigenvalues and eigenfunctions Image analysis Light modulation Light polarization Light transmission Mathematical models Nematic liquid crystals Optical character recognition Optical correlation Optical filters Optimization Phase modulation Quantum optics Reverse engineering Correlation methods Density (optical) Diffractive optical elements Geometrical optics Image processing Information systems Light Light modulation Light transmission Liquid crystal displays Liquids Modulation Nematic liquid crystals Optical correlation Optical data processing Optical properties Pattern recognition Reverse engineering Amplitude-only modulation Optical image processing Optical pattern recognition Phase-only modulation Programmable apodizers Liquid crystal displays Light modulators Apodizers Intensity measurements Optical image processing Optical pattern recognition Phase-only modulation Physical parameters Spatial light modulators Twisted nematic-liquid crystal displays |
| description |
In this paper we will revise the application of twisted nematic liquid crystal displays (TN-LCD) as spatial light modulators (SLM) for image processing and diffractive optics. In general two kind of responses are desired for the mentioned applications: amplitude-only and phase-only modulation. In general the users of commercially available LCDs do not know the optical properties of the used material. Thus, a reverse-engineering approach is needed to optimize the LCD response. First, we show a simplified model, that we recently proposed, for the orientation of the LC molecules. The model allows the determination of the physical parameters of the LCD by means of simple intensity measurements. Second, we demonstrate the capability of the model to provide very accurate predictions of the optical transmission. Therefore, we can perform computer searches for the optimum orientation of the added polarizing elements to obtain the required optical transmission. We demonstrate the need to insert wave plates in front and behind the LCD to obtain either amplitude-only or phase-only regimes with the LCD. Finally, we show the application of the optimized LCD to display images and filters in optical image processing, as well as we show the design of diffractive optical elements and apodizers. |
| title |
Optimization of liquid crystal displays behavior in optical image processing and in diffractive optics |
| title_short |
Optimization of liquid crystal displays behavior in optical image processing and in diffractive optics |
| title_full |
Optimization of liquid crystal displays behavior in optical image processing and in diffractive optics |
| title_fullStr |
Optimization of liquid crystal displays behavior in optical image processing and in diffractive optics |
| title_full_unstemmed |
Optimization of liquid crystal displays behavior in optical image processing and in diffractive optics |
| title_sort |
optimization of liquid crystal displays behavior in optical image processing and in diffractive optics |
| publishDate |
2001 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0277786X_v81CR_n_p335_Campos http://hdl.handle.net/20.500.12110/paper_0277786X_v81CR_n_p335_Campos |
| _version_ |
1768542218465837056 |