The diffractive Achromat full spectrum computational imaging with diffractive optics

Yifan Peng, Qiang Fu, Felix Heide, Wolfgang Heidrich

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

10 Scopus citations

Abstract

Diffractive optical elements (DOEs) are promising in computational imaging because they can drastically reduce the size and weight of imaging devices compared to their refractive counterparts. However, the inherent strong dispersion limits their use in full spectrum imaging, causing unacceptable loss of color fidelity. In particular, metamerism introduces a data dependency in the image blur, which has been neglected in computational imaging methods. We introduce both a diffractive achromat based on computational optimization, as well as a corresponding cross-scale algorithm for correction of residual aberrations. The height profile of a diffractive lens is optimized to balance the focusing contributions of different wavelengths. The nearly identical spectral point spread functions (PSFs) create approximately spectrally invariant blur kernels. This property guarantees good color preservation and facilitates correction of residual aberrations in our fast two-step deconvolution without additional color priors. We demonstrate a diffractive achromat on a 0.5mm ultrathin substrate, with producing high color fidelity and better image quality in full visible spectrum.

Original languageEnglish (US)
Title of host publicationSA 2016 - SIGGRAPH ASIA 2016 Virtual Reality Meets Physical Reality
Subtitle of host publicationModelling and Simulating Virtual Humans and Environments
PublisherAssociation for Computing Machinery, Inc
ISBN (Electronic)9781450345484
DOIs
StatePublished - Nov 28 2016
Externally publishedYes
Event2016 SIGGRAPH ASIA Virtual Reality Meets Physical Reality: Modelling and Simulating Virtual Humans and Environments, SA 2016 - Macau, China
Duration: Dec 5 2016Dec 8 2016

Publication series

NameSA 2016 - SIGGRAPH ASIA 2016 Virtual Reality Meets Physical Reality: Modelling and Simulating Virtual Humans and Environments

Conference

Conference2016 SIGGRAPH ASIA Virtual Reality Meets Physical Reality: Modelling and Simulating Virtual Humans and Environments, SA 2016
CountryChina
CityMacau
Period12/5/1612/8/16

All Science Journal Classification (ASJC) codes

  • Computer Graphics and Computer-Aided Design
  • Human-Computer Interaction
  • Computer Vision and Pattern Recognition

Keywords

  • Achromatic
  • Computational imaging
  • DOE
  • Ultrathin

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    Peng, Y., Fu, Q., Heide, F., & Heidrich, W. (2016). The diffractive Achromat full spectrum computational imaging with diffractive optics. In SA 2016 - SIGGRAPH ASIA 2016 Virtual Reality Meets Physical Reality: Modelling and Simulating Virtual Humans and Environments [4] (SA 2016 - SIGGRAPH ASIA 2016 Virtual Reality Meets Physical Reality: Modelling and Simulating Virtual Humans and Environments). Association for Computing Machinery, Inc. https://doi.org/10.1145/2992138.2992145