27 April 2012 Explication of diffraction lights on an optical imaging system from a Fraunhofer diffraction perspective
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Proceedings Volume 8429, Optical Modelling and Design II; 842916 (2012); doi: 10.1117/12.921520
Event: SPIE Photonics Europe, 2012, Brussels, Belgium
Abstract
Low-height camera modules are demanded for such applications as cellular phones and vehicles. For designing optical lens, it has widely been recognized that a trade-off exists between reducing the number of lenses and camera resolution. The optical performance of imaging lenses has been improved by diffraction gratings, which have a peculiar inverse dispersion in the wavelength and exhibit the efficacy of correction for chromatic aberration. We can simultaneously reduce the number of lenses and maintain optical resolution using diffraction gratings. However, we have found a generation of striped flare lights under intense light sources that differ from unnecessary order diffraction lights. In this paper, we reveal the generation mechanism of these new striped diffraction lights and suggest a novel structure of diffraction gratings that can decrease them.
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Takamasa Ando, Tsuguhiro Korenaga, Masa-aki Suzuki, "Explication of diffraction lights on an optical imaging system from a Fraunhofer diffraction perspective", Proc. SPIE 8429, Optical Modelling and Design II, 842916 (27 April 2012); doi: 10.1117/12.921520; https://doi.org/10.1117/12.921520
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KEYWORDS
Diffraction gratings

Diffraction

Optical imaging

Far-field diffraction

Imaging systems

Cameras

Phase modulation

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