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This multistage prism window (1) is provided with first and second transparent plate materials (10a, 10b), a first prism (30), a reflection member (40), a second prism (50), and a heat absorption member (60). The first prism (30) collects, onto the reflection member (40), light of which an angle to the normal line of the first and second transparent plate materials (10a, 10b) is a prescribed angle or larger, retro-reflects the collected light, and transmits light in which the angle is smaller than the first prescribed angle. The second prism (50) collects, onto the heat absorption member (60), light of which an angle to the normal line is smaller than the prescribed angle and equal to or greater than a second prescribed angle, wherein the collected light is used for indoor heating, and transmits light in which the angle is smaller than the second prescribed angle.
This multistage prism window (1) is provided with first and second transparent plate materials (10a, 10b), a first prism (30), a reflection member (40), a second prism (50), and a heat absorption member (60). The first prism (30) collects, onto the reflection member (40), light of which an angle to the normal line of the first and second transparent plate materials (10a, 10b) is a prescribed angle or larger, retro-reflects the collected light, and transmits light in which the angle is smaller than the first prescribed angle. The second prism (50) collects, onto the heat absorption member (60), light of which an angle to the normal line is smaller than the prescribed angle and equal to or greater than a second prescribed angle, wherein the collected light is used for indoor heating, and transmits light in which the angle is smaller than the second prescribed angle.
Multistage prism window
NAKAMURA TAKUJU (author)
2021-04-22
Patent
Electronic Resource
English
IPC:
G02B
Optische Elemente, Systeme oder Geräte
,
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
/
E06B
Feste oder bewegliche Abschlüsse für Öffnungen in Bauwerken, Fahrzeugen, Zäunen oder ähnlichen Einfriedungen allgemein, z.B. Türen, Fenster, Läden, Tore
,
FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES, OR LIKE ENCLOSURES, IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES