Magnification enhanced multi-aperture system with distorted lens design

Yueh Sheng Liu, Wei Ting Lin, Chun Ho Chen, Yi-Pai Huang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


In recent years, some companies take a dual-camera system to improve the magnification ability and zoomed image's quality in multi-function imaging devices. The solution comprises two apertures to perform a large zooming range without any mechanism moving optical elements: one with a wide-angle lens for lower magnification and the other with a telephoto lens for higher magnification. Nevertheless, this dual-camera system still needs to interpolate the digital zoomed image between the lower and higher magnification images results in a discontinuous quality of zoomed image. We propose a distorted lens (DL) dual-camera system with varying focal length for higher magnification performance and smoother optical zoom. The proposed optical system has a greater pixel count per field angle at the center of sensor than at the periphery of sensor. Therefore, we sacrifice some resolution of the peripheral FOV to enhance the resolution of the center FOV for improving the capability of magnification. For instance, using a 20 MP sensor and displaying a Full HD zoomed image, the maximum magnification factor of 7.54 is achieved in our distorted lens system, but this factor of 3.12 in the distortionless lens system. In other words, we raise the capability of magnification up to 242%.

Original languageEnglish
Title of host publicationImage Sensing Technologies
Subtitle of host publicationMaterials, Devices, Systems, and Applications IV
EditorsAchyut K. Dutta, Nibir K. Dhar
ISBN (Electronic)9781510609198
StatePublished - 1 Jan 2017
EventImage Sensing Technologies: Materials, Devices, Systems, and Applications IV 2017 - Anaheim, United States
Duration: 12 Apr 201713 Apr 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceImage Sensing Technologies: Materials, Devices, Systems, and Applications IV 2017
CountryUnited States


  • Distortion
  • Dual-Camera
  • Image Sensing System
  • Optical Zoom

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