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Proceedings Paper

Design and development of bi-directional viewer
Author(s): Zong-Ru Yu; Cheng-Fang Ho; Annie Liu; Tai-Wen Lee; Wen-Lung Lin; Wei-Yao Hsu
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Paper Abstract

Bi-directional viewer just likes a lens of camera. Unlike conventional camera lens, the bi-directional viewer captures not only front view but also side view around the bi-directional viewer. The barrel of bi-directional viewer was designed to have cuts in the side to allow side light to come through, and we use two aspherical mirrors to receive and change the side light to converge on the main optical path. The front view and side view can be imaged simultaneously on an image sensor. Commercial aspherized achromatic lens and micro video lens were also used to keep the image quality and miniaturize the size of the bi-directional viewer respectively. We report on the development of bi-directional viewer, including optical design, optical simulation, optomechanics design, fabrication techniques, assembly procedure and performance testing. The MTF of the bi-directional viewer is also measured and discussed in this paper. We successfully design and realize a bi-directional viewer, which can perform 100 lp/mm spatial frequency image in detail above 20% contrast in the 7.6 mm front view area. And we keep the dimensions of this device within 35 mm in total length and Φ20 mm in diameter.

Paper Details

Date Published: 11 October 2012
PDF: 7 pages
Proc. SPIE 8486, Current Developments in Lens Design and Optical Engineering XIII, 848613 (11 October 2012); doi: 10.1117/12.928062
Show Author Affiliations
Zong-Ru Yu, Instrument Technology Research Ctr. (Taiwan)
Cheng-Fang Ho, Instrument Technology Research Ctr. (Taiwan)
Annie Liu, Columbia Univ. (United States)
Tai-Wen Lee, Instrument Technology Research Ctr. (Taiwan)
Wen-Lung Lin, Instrument Technology Research Ctr. (Taiwan)
Wei-Yao Hsu, Instrument Technology Research Ctr. (Taiwan)

Published in SPIE Proceedings Vol. 8486:
Current Developments in Lens Design and Optical Engineering XIII
R. Barry Johnson; Virendra N. Mahajan; Simon Thibault, Editor(s)

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