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Proceedings Paper

Design of a free-form lens system for short distance projection
Author(s): Bo Yang; Kan Lu; Wei Zhang; Fujian Dai
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Paper Abstract

A free-form lens system design is proposed for short distance projection. Free-form surface shape and non-rotational symmetrical structure provide us more freedoms for optimization. The catadioptric structure is also used to reduce the overall length of the whole system. The designed projector lens system consists of two parts. The first part is a rotationally symmetrical lens system which corrects the basic aberrations. The second part contains a free-form lens and a reflector which correct the distortion and other aberrations. We achieve 55inch projected image size at a display screen which is 300mm away from the lens system. The maximum distortion for all fields at all distances is less than 3%.

Paper Details

Date Published: 8 September 2011
PDF: 9 pages
Proc. SPIE 8128, Current Developments in Lens Design and Optical Engineering XII; and Advances in Thin Film Coatings VII, 81280E (8 September 2011); doi: 10.1117/12.897111
Show Author Affiliations
Bo Yang, Univ. of Shanghai for Science and Technology (China)
Kan Lu, Univ. of Shanghai for Science and Technology (China)
Wei Zhang, Univ. of Shanghai for Science and Technology (China)
Fujian Dai, Zhejiang Sunny Optics Co., Ltd (China)


Published in SPIE Proceedings Vol. 8128:
Current Developments in Lens Design and Optical Engineering XII; and Advances in Thin Film Coatings VII
R. Barry Johnson; Virendra N. Mahajan; Simon Thibault, Editor(s)

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