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Title:
DAYLIGHTING AND THERMAL INSULATION WINDOW
Document Type and Number:
Japanese Patent JP3656794
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To create light indoor environment which has the thermal insulation property and takes in natural light stably by arranging a linear Fresnel lens between a transparent or translucent plate material through, which light penetrates and scatters and a transparent plate material, and forming an air layer between the plate material on one side and the linear Fresnel lens.
SOLUTION: A linear Fresnel lens 2 is arranged between a transparent or translucent figured glass 1 through which light penetrates and scatters and a transparent glass 3 to constitute a daylighting lens system multiple layer face material S having a three layer structure on the whole. An outer surface of the figured glass 1 is smooth, and an inner surface thereof, namely, a surface on a side which faces the linear Fresnel lens 2, is a rugged face. Moreover, a surface of a side which faces a recessed and projecting part of the figured glass 1 of the linear Fresnel lens 2 is a stairlike Fresnel face 2a, and a surface on a side which faces the transparent glass 3 thereof is smooth. An air layer is formed between at least either of the figured glass 1 and the transparent glass 3 and the linear Fresnel lens 2.


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Inventors:
Tomio Fujikawa
Satoshi Nakamura
Mitsuru Osawa
Masao Komatsu
Application Number:
JP17050298A
Publication Date:
June 08, 2005
Filing Date:
June 04, 1998
Export Citation:
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Assignee:
Tokyu Construction Co., Ltd.
Natural Science Institute Co., Ltd.
International Classes:
E06B5/00; E06B9/24; E06B9/386; G02B5/02; (IPC1-7): E06B5/00; E06B9/24; G02B5/02
Domestic Patent References:
JP5083287U
JP54155637A
JP58146689A
Attorney, Agent or Firm:
Seishiro Suzuki