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Conference Paper: The diffractive achromat full spectrum computational imaging with diffractive optics

TitleThe diffractive achromat full spectrum computational imaging with diffractive optics
Authors
KeywordsAchromatic
Computational imaging
DOE
Ultrathin
Issue Date2016
Citation
ACM Transactions on Graphics, 2016, v. 35, n. 4, article no. a31 How to Cite?
AbstractDiffractive optical elements (DOEs) have recently drawn great attention 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 is a tremendous obstacle that limits the use of DOEs in full spectrum imaging, causing unacceptable loss of color fidelity in the images. In particular, metamerism introduces a data dependency in the image blur, which has been neglected in computational imaging methods so far. We introduce both a diffractive achromat based on computational optimization, as well as a corresponding algorithm for correction of residual aberrations. Using this approach, we demonstrate high fidelity color diffractive-only imaging over the full visible spectrum. In the optical design, the height profile of a diffractive lens is optimized to balance the focusing contributions of different wavelengths for a specific focal length. The spectral point spread functions (PSFs) become nearly identical to each other, creating approximately spectrally invariant blur kernels. This property guarantees good color preservation in the captured image and facilitates the correction of residual aberrations in our fast two-step deconvolution without additional color priors. We demonstrate our design of diffractive achromat on a 0.5mm ultrathin substrate by photolithography techniques. Experimental results show that our achromatic diffractive lens produces high color fidelity and better image quality in the full visible spectrum.
Persistent Identifierhttp://hdl.handle.net/10722/315258
ISSN
2023 Impact Factor: 7.8
2023 SCImago Journal Rankings: 7.766
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorPeng, Yifan-
dc.contributor.authorFu, Qiang-
dc.contributor.authorHeide, Felix-
dc.contributor.authorHeidrich, Wolfgang-
dc.date.accessioned2022-08-05T10:18:14Z-
dc.date.available2022-08-05T10:18:14Z-
dc.date.issued2016-
dc.identifier.citationACM Transactions on Graphics, 2016, v. 35, n. 4, article no. a31-
dc.identifier.issn0730-0301-
dc.identifier.urihttp://hdl.handle.net/10722/315258-
dc.description.abstractDiffractive optical elements (DOEs) have recently drawn great attention 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 is a tremendous obstacle that limits the use of DOEs in full spectrum imaging, causing unacceptable loss of color fidelity in the images. In particular, metamerism introduces a data dependency in the image blur, which has been neglected in computational imaging methods so far. We introduce both a diffractive achromat based on computational optimization, as well as a corresponding algorithm for correction of residual aberrations. Using this approach, we demonstrate high fidelity color diffractive-only imaging over the full visible spectrum. In the optical design, the height profile of a diffractive lens is optimized to balance the focusing contributions of different wavelengths for a specific focal length. The spectral point spread functions (PSFs) become nearly identical to each other, creating approximately spectrally invariant blur kernels. This property guarantees good color preservation in the captured image and facilitates the correction of residual aberrations in our fast two-step deconvolution without additional color priors. We demonstrate our design of diffractive achromat on a 0.5mm ultrathin substrate by photolithography techniques. Experimental results show that our achromatic diffractive lens produces high color fidelity and better image quality in the full visible spectrum.-
dc.languageeng-
dc.relation.ispartofACM Transactions on Graphics-
dc.subjectAchromatic-
dc.subjectComputational imaging-
dc.subjectDOE-
dc.subjectUltrathin-
dc.titleThe diffractive achromat full spectrum computational imaging with diffractive optics-
dc.typeConference_Paper-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1145/2897824.2925941-
dc.identifier.scopuseid_2-s2.0-84980027739-
dc.identifier.volume35-
dc.identifier.issue4-
dc.identifier.spagearticle no. a31-
dc.identifier.epagearticle no. a31-
dc.identifier.eissn1557-7368-
dc.identifier.isiWOS:000380112400001-

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