Transparent plate, in particular partition glass provided with a coating reflecting radiation and a window permeable to high frequency radiation

• US 6,356,236 B1
• Filed: 05/23/2000
• Issued: 03/12/2002
• Est. Priority Date: 04/21/1998
• Status: Expired due to Term

• Current Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Original Assignee: Saint-Gobain Glass France (Compagnie De Saint-Gobain)
• Inventors: Maeuser, Helmut, Immerschitt, Stefan
• Primary Examiner(s): LE, HOANGANH T
• Application Number:
  US09/445,466
• Time in Patent Office: 658 Days
• Field of Search: H01/Q.132, H01/Q.140, 343/713, 343/704, 343/873, 343/767, 343/770
• US Class Current: 343/713
• CPC Class Codes: B32B 17/10005 laminated safety glass or glazing
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10174 Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
• CPC Class Codes: B32B 17/10192 patterned in the form of columns or grids
• CPC Class Codes: B32B 17/10348 comprising an obscuration band
• CPC Class Codes: B32B 17/10376 Laminated safety glass or glazing containing metal wires
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: B32B 2367/00 Polyesters, e.g. PET, i.e. polyethylene terephthalate
• CPC Class Codes: C03C 17/00 Surface treatment of glass, not in the form of fibres or filaments, by coating optical coatings of optical elements G02B1/10
• CPC Class Codes: C03C 17/002 for flat glass, e.g. float glass
• CPC Class Codes: C03C 17/06 with metals C03C17/34, C03C17/44 take precedence
• CPC Class Codes: C03C 27/10 with the aid of adhesive specially adapted for that purpose
• CPC Class Codes: H01Q 15/14 Reflecting surfaces; Equivalent structures electromagnetic shields H01Q1/526
• CPC Class Codes: H01Q 15/24 Polarising devices; Polarisation filters H01Q15/12, H01Q15/22 take precedence

Abstract

A transparent sheet, which may particularly be used as a glazing has a radiation-reflective coating and at least one window permeable to high-frequency radiation. The window includes an area devoid of coating. The window is formed within a region of limited continuous area of the sheet, in which the ratio of the area devoid of coating to the total area of the transparent sheet is at least 25% in the case of the distribution, when flat, of the uncoated and coated areas.

Claims

1. A transparent sheet covered with a reflecting coating, comprising:

at least one window having an uncoated area permeable to high-frequency radiation, wherein;

said window is formed in a region of limited area made as one piece with said transparent sheet,

and wherein,

a ratio of the uncoated area to a total area of the transparent sheet is between 25% and 80%.

2. The transparent sheet according to claim 1, wherein said window has a pattern of uncoated lines, and areas coated as one piece, and said areas coated as one piece are separated from each other by said lines.

3. The transparent sheet according to claim 2, wherein said pattern comprises at least one group of parallel meandering lines connected together in pairs at their alternating ends by transitions.

4. The transparent sheet according to claim 3, wherein said pattern comprises two mutually perpendicular groups of lines which are parallel to each other.

5. The transparent sheet according to claim 3, wherein the mutual separations of the lines defined by the transitions are between 0.2 and 1.5 mm.

6. The transparent sheet according to claim 2, wherein a width of said lines is between 0.05 and 0.5 mm.

7. The transparent sheet according to claim 1, wherein a structuring laser forms said region as a continuous layer.

8. The transparent sheet according to claim 1, wherein said window has a horizontal extent of 200 mm and a vertical extent of 100 mm.

9. The transparent sheet according to claim 1, further comprising lining elements provided along an edge of said window optically masking a transition between said layer region and said window.

10. A transparent sheet covered with a reflective coating, comprising:

at least one window having an uncoated area permeable to high-frequency radiation,

wherein,

said window has a pattern of uncoated lines, and areas coated as one piece,

said areas coated as one piece are separated from each other by said lines,

said pattern comprising at least one group of parallel meandering lines connected together in pairs at their alternating ends by transitions,

said window is formed in a region of limited area made as one piece with said transparent sheet,

a ratio of uncoated area to the total area of said transparent sheet is between 25% and 80%.

11. The transparent sheet according to claim 10, wherein said pattern comprises two mutually perpendicular groups of lines which are parallel to each other.

12. The transparent sheet according to claim 10, wherein the mutual separations of the lines defined by the transitions are between 0.2 and 1.5 mm.

13. The transparent sheet according to claim 10, wherein a width of said lines is between 0.05 and 0.5 mm.

14. The transparent sheet according to claim 10, wherein a structuring laser forms said region as a continuous layer.

15. The transparent sheet according to claim 10, wherein said window has a horizontal extent of 200 mm and a vertical extent of 100 mm.

16. The transparent sheet according to claim 10, further comprising lining elements provided along an edge of said window optically masking a transition between said layer region and said window.