An Image-Based Alignment Errors Correction Method for Segmented Fresnel Primary Mirror
| Autor: | Lujia Zhao, Chunlin Guan, Licheng Zhu, Ping Yang, Bing Xu, Lianghua Wen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:Applied optics. Photonics
fine phasing correction Computer science alignment errors ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION 02 engineering and technology 01 natural sciences Optical telescope law.invention 010309 optics Primary mirror Optics law Optical transfer function 0103 physical sciences lcsh:QC350-467 Segmented membrane telescope Electrical and Electronic Engineering Point target business.industry lcsh:TA1501-1820 Fresnel lens 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics Frequency domain Computer Science::Computer Vision and Pattern Recognition Metric (mathematics) 0210 nano-technology business Error detection and correction lcsh:Optics. Light |
| Zdroj: | IEEE Photonics Journal, Vol 12, Iss 2, Pp 1-14 (2020) |
| ISSN: | 1943-0655 |
| Popis: | The alignment errors correction of segmented Fresnel primary mirror in multiple imaging scenes is simulated. Based on the linear relationship between five kinds of alignment errors and modulation transfer function metric or image frequency domain metric, an iterative correction method is introduced to compensate the alignment errors of segmented Fresnel lens at five degrees of freedom. The correction capability under point target imaging and the effect of alignment error correction under extended target imaging are studied. The simulation results show that the proposed correction scheme can effectively correct the alignment error when the rms value of segmented Fresnel primary mirror is less than 0.7λ. This method does not need to add any additional devices to the telescope, but optimizes directly based on the images, and is independent of the spatial structure of the imaging target. It may be suitable for fine phasing correction of segmented membrane diffractive optical telescope in orbit. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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