Multi-spectral random illumination using a liquid crystal spatial light modulator
Abstract Background Using phase-only liquid crystal spatial light modulator (LC-SLM) to generate random illumination is always used in phase-retrieval and single pixel imaging as it have high energy efficiency. While the methods were only used to generate monochromatic illumination. This paper aims...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2018-08-01
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| Series: | Journal of the European Optical Society-Rapid Publications |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s41476-018-0088-6 |
| _version_ | 1819002505211674624 |
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| author | Xiao Chen Zhiguang Shi Weidong Hu |
| author_facet | Xiao Chen Zhiguang Shi Weidong Hu |
| author_sort | Xiao Chen |
| collection | DOAJ |
| description | Abstract Background Using phase-only liquid crystal spatial light modulator (LC-SLM) to generate random illumination is always used in phase-retrieval and single pixel imaging as it have high energy efficiency. While the methods were only used to generate monochromatic illumination. This paper aims to use LC-SLM generating the multi-spectral random illumination. Methods The method requires only one SLM; multiple laser beams are simultaneously used to illuminate the entire SLM. Random voltages designed with a probability density function (PDF) are applied to modulate the random phases in the multi-spectral emitted light beam, leading to random amplitude spots in the far field. By optimize the PDF, the random illumination spot can be close to uniform distributed with high efficiency. Results The average intensities of the random light spots are almost uniformly distributed within the range of the first diffraction order. And the zero-order beam is eliminated. The proposed method has a high energy efficiency and refresh rate and does not require the SLM to have an excessive modulation range. Conclusion This paper provides a method to generate multi-spectral random illumination using a LC-SLM, which can be used in phase-retrieval and single pixel imaging. |
| first_indexed | 2024-12-20T23:06:10Z |
| format | Article |
| id | doaj.art-e1c9491d742d4a3ebe16707f62a608ab |
| institution | Directory Open Access Journal |
| issn | 1990-2573 |
| language | English |
| last_indexed | 2024-12-20T23:06:10Z |
| publishDate | 2018-08-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Journal of the European Optical Society-Rapid Publications |
| spelling | doaj.art-e1c9491d742d4a3ebe16707f62a608ab2022-12-21T19:23:51ZengEDP SciencesJournal of the European Optical Society-Rapid Publications1990-25732018-08-011411610.1186/s41476-018-0088-6Multi-spectral random illumination using a liquid crystal spatial light modulatorXiao Chen0Zhiguang Shi1Weidong Hu2Automatic Target Recognition Key Laboratory, National University of Defense TechnologyAutomatic Target Recognition Key Laboratory, National University of Defense TechnologyAutomatic Target Recognition Key Laboratory, National University of Defense TechnologyAbstract Background Using phase-only liquid crystal spatial light modulator (LC-SLM) to generate random illumination is always used in phase-retrieval and single pixel imaging as it have high energy efficiency. While the methods were only used to generate monochromatic illumination. This paper aims to use LC-SLM generating the multi-spectral random illumination. Methods The method requires only one SLM; multiple laser beams are simultaneously used to illuminate the entire SLM. Random voltages designed with a probability density function (PDF) are applied to modulate the random phases in the multi-spectral emitted light beam, leading to random amplitude spots in the far field. By optimize the PDF, the random illumination spot can be close to uniform distributed with high efficiency. Results The average intensities of the random light spots are almost uniformly distributed within the range of the first diffraction order. And the zero-order beam is eliminated. The proposed method has a high energy efficiency and refresh rate and does not require the SLM to have an excessive modulation range. Conclusion This paper provides a method to generate multi-spectral random illumination using a LC-SLM, which can be used in phase-retrieval and single pixel imaging.http://link.springer.com/article/10.1186/s41476-018-0088-6Spatial light modulatorsMulti-spectrumRandom illuminationGenetic algorithm |
| spellingShingle | Xiao Chen Zhiguang Shi Weidong Hu Multi-spectral random illumination using a liquid crystal spatial light modulator Journal of the European Optical Society-Rapid Publications Spatial light modulators Multi-spectrum Random illumination Genetic algorithm |
| title | Multi-spectral random illumination using a liquid crystal spatial light modulator |
| title_full | Multi-spectral random illumination using a liquid crystal spatial light modulator |
| title_fullStr | Multi-spectral random illumination using a liquid crystal spatial light modulator |
| title_full_unstemmed | Multi-spectral random illumination using a liquid crystal spatial light modulator |
| title_short | Multi-spectral random illumination using a liquid crystal spatial light modulator |
| title_sort | multi spectral random illumination using a liquid crystal spatial light modulator |
| topic | Spatial light modulators Multi-spectrum Random illumination Genetic algorithm |
| url | http://link.springer.com/article/10.1186/s41476-018-0088-6 |
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