EP1009903A1 - Element pour eclairer des locaux par guidage cible de la lumiere du jour et procede de production d'un tel element - Google Patents

Element pour eclairer des locaux par guidage cible de la lumiere du jour et procede de production d'un tel element

Info

Publication number
EP1009903A1
EP1009903A1 EP98951334A EP98951334A EP1009903A1 EP 1009903 A1 EP1009903 A1 EP 1009903A1 EP 98951334 A EP98951334 A EP 98951334A EP 98951334 A EP98951334 A EP 98951334A EP 1009903 A1 EP1009903 A1 EP 1009903A1
Authority
EP
European Patent Office
Prior art keywords
daylight
centers
solvent
deformation
structures
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98951334A
Other languages
German (de)
English (en)
Other versions
EP1009903B1 (fr
Inventor
Walter DÖLL
Laszlo KÖNCZÖL
Andreas Gombert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Publication of EP1009903A1 publication Critical patent/EP1009903A1/fr
Application granted granted Critical
Publication of EP1009903B1 publication Critical patent/EP1009903B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S11/00—Non-electric lighting devices or systems using daylight
    • F21S11/007—Non-electric lighting devices or systems using daylight characterised by the means for transmitting light into the interior of a building

Definitions

  • the invention relates to an element for illuminating rooms by directing daylight, with an optically transparent base body through which the light falls into the respective room, and to a method for producing such an element.
  • a significant contribution can be made through window elements that specifically redirect the light that is present on the facade to a greater extent than normal into the interior of the room.
  • Prism elements, holographic systems or the like are currently used as such light or window elements.
  • DE 195 38 651 A1 discloses a sun protection device made of a material that is transparent to sunlight is flat and has a smooth surface that is irradiated by the light.
  • the underside has at least one prism-like contour, the cross-section of which each has an approximately right-angled triangle.
  • the known elements therefore require the use of expensive basic bodies, which have to be processed further at a comparatively high cost, so far they have not been widely used.
  • the invention has for its object to provide an element for lighting rooms by directing daylight, which is optically effective in terms of its function, and which can be produced inexpensively.
  • a multiplicity of structures are provided in the optically transparent base body, on which (additional) light is deflected into the respective room by total reflection.
  • the large number of structures can consist of at least approximately parallel cracks or deformation centers. However, it is particularly preferred if the element is not provided with cracks in the actual sense, but with deformation centers and in particular so-called crazes.
  • Crazes are flat, wedge-shaped deformation centers with a change in refractive index compared to the base material, as can be generated in particular in glass-like thermoplastics. Crazes, i.e. flat wedge-shaped deformation centers, arise from local stress increases, such as those that occur at crack tips. They have the macroscopic appearance of small cracks and, like these, spread perpendicular to the main direction of tension.
  • the refractive index is reduced compared to the index of the polymer base material, and at the same time the transition from base material to craze is sharp, so that total reflections on the crazes are obtained, and the additional light through the window pane into the room to be illuminated conduct.
  • thermoplastic can be polymethyl methacrylate (PMMA).
  • PMMA polymethyl methacrylate
  • other polymers such as polystyrene, polycarbonate, etc., can also be used as long as they are transparent, and the structures provided according to the invention for introducing additional light into the respective room can be produced in them.
  • a plate-shaped base body made of a polymer is exposed to a tensile stress which runs parallel is applied to the plate surface.
  • a tensile stress which runs parallel is applied to the plate surface.
  • crazes ie flat wedge-shaped deformation centers with a change in the refractive index relative to the base material.
  • a solvent and in particular an organic solvent are additionally applied to the plate surface.
  • the application of voltage and optionally a solvent can preferably be carried out at elevated temperature.
  • the method according to the invention is also suitable for processing continuous material:
  • a bending device is used to apply or generate the tensile stress, through which the plate material is pushed as an endless material.
  • Fig. 1 shows the basic principle of the invention
  • Fig. 2 explains the method according to the invention.
  • Fig. 1 shows a room 1, which is illuminated by a window 2.
  • the window 2 has a transparent element or a pane 3 which, in comparison with conventional windows, provides additional lighting by specifically directing daylight 4 into the interior of the room.
  • the pane 3 - as the detail magnification A shows - a large number of structures 5 on which additional daylight or sunlight 4 is deflected into space 1 by total reflection 6.
  • a tensile stress 6 is applied to a pane 3 made of a polymer, preferably a glass-like thermoplastic, for example polymethyl methacrylate, which acts parallel to the surface of the pane 3.
  • a polymer preferably a glass-like thermoplastic, for example polymethyl methacrylate
  • the surface of the pane 3 is acted upon by a solvent and in particular an organic solvent and is optionally exposed to an elevated temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
EP98951334A 1997-08-31 1998-08-31 Procede de production d'un element pour eclairer des locaux Expired - Lifetime EP1009903B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19737904A DE19737904A1 (de) 1997-08-31 1997-08-31 Element zur Beleuchtung von Räumen durch gezieltes Lenken von Tageslicht sowie Verfahren zur Herstellung eines derartigen Elements
DE19737904 1997-08-31
PCT/EP1998/005519 WO1999011898A1 (fr) 1997-08-31 1998-08-31 Element pour eclairer des locaux par guidage cible de la lumiere du jour et procede de production d'un tel element

Publications (2)

Publication Number Publication Date
EP1009903A1 true EP1009903A1 (fr) 2000-06-21
EP1009903B1 EP1009903B1 (fr) 2002-10-23

Family

ID=7840686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98951334A Expired - Lifetime EP1009903B1 (fr) 1997-08-31 1998-08-31 Procede de production d'un element pour eclairer des locaux

Country Status (4)

Country Link
EP (1) EP1009903B1 (fr)
AT (1) ATE226681T1 (fr)
DE (2) DE19737904A1 (fr)
WO (1) WO1999011898A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10207564C1 (de) * 2002-02-22 2003-11-20 Fraunhofer Ges Forschung Vorrichtung zur Lichtlenkung aus wenigstens einem teiltransluzentem Flächenmaterial
DK176229B1 (da) 2002-06-18 2007-03-26 Photosolar Aps Optisk element til afskærmning af lys
TWI499745B (zh) * 2012-12-06 2015-09-11 光引導系統及天花板結構
JP2015197500A (ja) * 2014-03-31 2015-11-09 日東電工株式会社 光学フィルム

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003923A1 (de) * 1990-02-09 1991-08-14 Andreas Laurenz Licht-streukoerper
DE69429113T2 (de) * 1993-05-04 2002-07-25 Redbus Serraglaze Ltd., Knowle Zur verwendung in der verglasung geeignetes optisches bauelement
DE19538651B4 (de) * 1995-10-17 2004-07-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Sonnenschutzvorrichtung aus einem für Sonnenlicht transparenten Material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9911898A1 *

Also Published As

Publication number Publication date
ATE226681T1 (de) 2002-11-15
DE19737904A1 (de) 1999-03-11
WO1999011898A1 (fr) 1999-03-11
DE59806068D1 (de) 2002-11-28
EP1009903B1 (fr) 2002-10-23

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