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Being cut off by the Fresnel prism forward the Fresnel prism which possesses with the
Being cut off by the Fresnel prism forward the Fresnel prism which possesses with the
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机译:被菲涅耳棱镜切断向前的菲涅耳棱镜,随菲涅耳棱镜
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摘要
A transparent screen is constructed in such a way that a plurality of Fresnel prisms 12d each of which is smaller than a plurality of Fresnel prisms 12a and has a shape approximately similar to that of each of the plurality of Fresnel prisms 12a are arranged in a sawtooth shape on a non-light incidence surface portion of a Fresnel lens 12 on a light incidence side to which any image light PB applied from a projector 1 is not applied directly because blocked by a Fresnel prism 12a placed frontwardly.
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