Limit of phase only approach in micro-lens design
Phase only approach (POA) is generally used to analyze diffractive optical elements (DOEs) such as micro–lenses. We used 3–D finite difference time domain (FDTD) method with perfect matched layer (PML) absorbing boundary conditions to test several micro–lenses that were designed based on phase only...
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| Main Authors: | , , |
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| Format: | Article |
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Penerbit UTM Press
2011
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/45019/ |
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| Summary: | Phase only approach (POA) is generally used to analyze diffractive optical elements (DOEs) such as micro–lenses. We used 3–D finite difference time domain (FDTD) method with perfect matched layer (PML) absorbing boundary conditions to test several micro–lenses that were designed based on phase only approach to evaluate the accuracy of this approach. It is shown that if the focal length is greater than 80? and 25? for 2p and 4p phase resets, respectively, the error in the main lobe diffraction efficiency will be less than 10%. |
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