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13 June 2023 Frequency selective diffractive optical element (FSDOE)
A. Ünal
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Proceedings Volume 12518, Window and Dome Technologies and Materials XVII ; 125180C (2023) https://doi.org/10.1117/12.2657048
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States
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Abstract
In this research, a novel hybrid lens consisting of a metallic circular symmetry and a diffractive optical element (DOE), whose combined diffraction distribution is very similar to a single DOE, is proposed as an alternative to a hybrid lens consisting of Frequency Selective Surface (FSS) and a DOE. The hybrid lenses are simulated by using optical wave propagation in optical bands and simulated with CST Studio Suite in RF bands. Simulation results are reported for both RF and optical bands. The results indicate that the novel hybrid circularly symmetric lens has almost the same shielding effectiveness (SE) in the RF band compared to the hybrid FSSs. Furthermore, circular symmetry minimizes the spectral components specified in the Abbe-Porter experiment. Consequently, due to the circular symmetry, the combined amplitude distribution of the hybrid lens is close to the amplitude distribution of only one lens. As a result of this research, the proposed hybrid lens will contribute to the development of these structures, entitled FSDOE in this study.
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A. Ünal "Frequency selective diffractive optical element (FSDOE)", Proc. SPIE 12518, Window and Dome Technologies and Materials XVII , 125180C (13 June 2023); https://doi.org/10.1117/12.2657048
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KEYWORDS
Diffractive optical elements
Optical transmission
Wave propagation
Diffraction
Defense technologies
Optical simulations
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