Optical Design and Engineering

Free-form surface design method for nonaxial-symmetrical reflectors producing arbitrary image patterns

[+] Author Affiliations
Chung-Yu Tsai

National Formosa University, Department of Mechanical and Computer-Aided Engineering, 64 Wunhua Road, Huwei, Yunlin 632, Taiwan

Opt. Eng. 55(7), 075104 (Jul 27, 2016). doi:10.1117/1.OE.55.7.075104
History: Received March 7, 2016; Accepted July 11, 2016
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Abstract.  A free-form (FF) surface design method is proposed for a nonaxial-symmetrical projector system comprising an FF reflector and a light source. The profile of the reflector is designed using a nonaxial-symmetrical FF (NFF) surface construction method such that each incident ray is directed in such a way as to form a user-specified image pattern on the target region of the image plane. The light ray paths within the projection system are analyzed using an exact analytical model and a skew-ray tracing approach. The validity of the proposed NFF design method is demonstrated by means of ZEMAX simulations. It is shown that the image pattern formed on the target region of the image plane is in good agreement with that specified by the user. The NFF method is mathematically straightforward and easily implemented in computer code. As such, it provides a useful tool for the design and analysis stages of optical systems design.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Chung-Yu Tsai
"Free-form surface design method for nonaxial-symmetrical reflectors producing arbitrary image patterns", Opt. Eng. 55(7), 075104 (Jul 27, 2016). ; http://dx.doi.org/10.1117/1.OE.55.7.075104


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