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FOCUSING ELEMENT, FOCUSING ELEMENT ARRAY, EXPOSURE DEVICE AND IMAGE FORMING DEVICE
FOCUSING ELEMENT, FOCUSING ELEMENT ARRAY, EXPOSURE DEVICE AND IMAGE FORMING DEVICE
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机译:聚焦元件,聚焦元件阵列,曝光设备和图像形成设备
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摘要
There is provided a focusing element including: a light-generating element that generates light in a pre-specified wavelength range and emits diffuse light; and a hologram element in a recording layer disposed at a light emission side of the light-generating element, the hologram element being recorded by wavelength multiplexing with light of plural wavelengths selected from the wavelength range of the light-generating element, and the hologram element being illuminated with the diffuse light from the light-generating element and emitting diffracted light that converses at a pre-specified focusing point.
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