An Artificial Compound Eye Using a Microlens Array and Its Application to Scale-Invariant Processing |
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Authors: | Kenjiro Hamanaka Hiroshi Koshi |
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Affiliation: | (1) Tsukuba Research Center, Nippon Sheet Glass Co., Ltd., 5-4, Tokodai, Tsukuba-city, Ibaraki 300-26, Japan;(2) Fiber-optics Division, Nippon Sheet Glass Co., Ltd., 5-8-1, Nishi-Hashimoto, Sagamihara-city Kanagawa 229, Japan |
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Abstract: | An artificial compound eye corresponding to apposition eyes of insects has been demonstrated using a two-dimensional array of gradient-index rod lenses known as a Selfoc lens plate (a SLP). A single erect Moiré image is reconstructed from a number of inverted micro-images by an experimental optical system composed of the SLP, a pinhole array and a plano-concave lens. Characteristics of the compound eye is briefly discussed from the viewpoints of space-bandwidth product, viewing angle, and focal depth. Capability of a scale-invariant image sensor that has been proposed as an application of the compound-eye-type imager was also proved experimentally. |
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Keywords: | microlens array gradient-index lens compound eye insects’ eye Moiré imaging image processing optical information processing |
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