Design of a compact and high-resolution image scanner with large depth-of-field based on compound eye system

Weixing Lei; Dewen Cheng; Tong Yang; Yue Liu; Hailong Chen; Yongtian Wang

doi:10.1117/12.2574980

10 October 2020 Design of a compact and high-resolution image scanner with large depth-of-field based on compound eye system

Weixing Lei, Dewen Cheng, Tong Yang, Yue Liu, Hailong Chen, Yongtian Wang

Author Affiliations +

Proceedings Volume 11548, Optical Design and Testing X; 115481V (2020) https://doi.org/10.1117/12.2574980
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

The compound eye optical system has attracted much recent attention, owing to its large field-of-view, compact structure, and rapid imaging capabilities. We designed a compact image scanner (cross-section 36.5 mm × 17 mm) based on the compound eye system. A single imaging unit is mainly composed of two freeform mirrors and a flat mirror, and its field-of-view in object space reaches 10 mm. The modulation transfer function of the system is greater than 0.6 at 12 cycles/mm corresponding to Nyquist spatial frequency of 600 dots per inch in depth-of-field of 0~4 mm. Furthermore, a larger field-of-view is achieved by splicing multiple imaging units with 1-mm overlap in object space. An object-side telecentric system is used to obtain constant magnification at different object distances and the distortion (<1 μm) is controlled by freeform mirrors. The final image is obtained by image splicing. The imaging quality of the scanner is further improved by eliminating stray light.

Conference Presentation

Citation Download Citation

Weixing Lei, Dewen Cheng, Tong Yang, Yue Liu, Hailong Chen, and Yongtian Wang "Design of a compact and high-resolution image scanner with large depth-of-field based on compound eye system", Proc. SPIE 11548, Optical Design and Testing X, 115481V (10 October 2020); https://doi.org/10.1117/12.2574980

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