Design of a Reflective Aspherical Surface of a Compact Beam-Shaping Device |
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| Authors: | Toshimitsu Takaoka Naoki Kawano Yasuhiro Awatsuji Toshihiro Kubota |
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| Institution: | (1) Department of Electronics and Information Science, Faculty of Engineering and Design, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan;(2) PRESTO, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan;(3) Present address: Nalux Co., Ltd., Japan;(4) Present address: Ushio Inc., Japan |
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| Abstract: | A compact beam-shaping device with a reflective aspherical surface is proposed. The device converts a circular symmetric Gaussian
beam from a laser into a uniform distribution on a target plane. The device consists of a laser, a reflective aspherical surface
formed on the base plane inclined by 45° against the optical axis, and a spacer. The surface is designed for an optical device
used as a transmitter of indoor wireless optical communication, which is one of the promising applications. The designed surface
is obtained by approximation using polynomial. Beam shaping of a simulated surface and a uniform intensity distribution on
the target plane is obtained. The intensity distribution generated by the surface is numerically simulated and evaluated if
the surface is misaligned. It is clarified that the generated distribution is tolerable for the misalignment. |
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| Keywords: | optics design beam shaping optical device aspherical surface uniform illumination beam homogenizer |
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