Details

Autor(en) / Beteiligte

• Xie, Xinhui
• Yu, Xunbo
• Gao, Xin
• Pei, Xiangyu
• Wang, Yuedi
• Sang, Xinzhu
• Yan, Binbin

Titel

Extended depth of field method with a designed diffraction optical element based on multi-depth fusion and end-to-end optimization

Ist Teil von

• Optics communications, 2022-08, Vol.517, p.128317, Article 128317

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Depth of field (DoF) defines the depth range of a 3D scene that can be observed by viewers. In the conventional lens-based imaging process, the diffraction effect of lens limits the display depth range, which has an adverse effect on the display quality of lens-based light-field display systems and it is the major obstacle to the practical application of light-field display. Aiming to break through the inherent shallow DOF characteristics of lens and obtain better display effect, an extended depth of field method with a designed diffraction optical element (DOE) which combined multi-depth fusion and end-to-end optimization is proposed. By analyzing the effect of diffraction on optical imaging process, a DOE enables balance display quality over the whole depth range is designed, and a pre-filtering convolutional neural network (CNN) is constructed to complete end-to-end optimization framework and avoid image blur. The validity of the proposed method is confirmed by simulation experiments and the depth range is extended effectively without display sharpness declining severely. •An extended depth of field method which combined multi-depth fusion and end-to-end optimization is proposed.•An end-to-end optimization framework was constructed for optical design.•Diffraction optical imaging model with multi-depth fusion analyze imaging process.•A pre-filtering CNN was introduced to prevent image quality degradation in extended DoF.•The co-design approach can realize large DoF with high-quality display performance.