Aspheric single-element lens using birefringent material for miniaturized imaging system

Yupeng Zhang, Toshitsugu Ueda

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    1 Citation (Scopus)

    Abstract

    An aspheric single-element lens made of birefringent material is proposed in this paper. This lens is capable of suppressing aliasing artifacts in a captured image, which is caused by inability of the image sensor to detect fine patterns with higher spatial frequency than the Nyquist frequency of the sensor array. At the same time, this lens possesses converging capability like a conventional convex lens and tolerable optical aberrations by employing aspheric surfaces. Compared to conventional imaging systems that use multi-lens structure to tackle optical aberrations and realize aliasing suppression by stacking up more than two optical low pass filters (OLPFs), an imaging system using our lens can greatly reduce the lens stack height and manufacturing cost. Image capturing simulation using the proposed lens indicates that aliasing artifacts are effectively reduced. This lens is expected to be used in miniaturized imaging system such as smartphone cameras and laptop cameras.

    Original languageEnglish
    Title of host publicationProceedings of IEEE Sensors
    DOIs
    Publication statusPublished - 2012
    Event11th IEEE SENSORS 2012 Conference - Taipei
    Duration: 2012 Oct 282012 Oct 31

    Other

    Other11th IEEE SENSORS 2012 Conference
    CityTaipei
    Period12/10/2812/10/31

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    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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