Compact reflective system for ideal imaging concentration
We propose a new design principle for optimal concentration of light with small diffusivity based on the conservation of local brightness in passive optical transformations. A coordinate transformation is applied on the incoming rays to compensate for the variations in local brightness by the focusi...
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| Published in | Applied optics. Optical technology and biomedical optics Vol. 58; no. 3; p. 485 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
20.01.2019
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| Online Access | Get more information |
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| Summary: | We propose a new design principle for optimal concentration of light with small diffusivity based on the conservation of local brightness in passive optical transformations. A coordinate transformation is applied on the incoming rays to compensate for the variations in local brightness by the focusing stage. We apply this analytic design for a compact reflective configuration for ideal imaging concentration of diffuse light such as sunlight in one dimension on an elongated target with arbitrary cross-sectional shape at the thermodynamic limit. As illustrations, we present the design for two different target geometries and verify its validity using numerical ray-tracing simulations. The same configuration can be used in reverse as an ideal collimator of a finite diffuse source. |
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| ISSN: | 2155-3165 |
| DOI: | 10.1364/AO.58.000485 |