TINTED LAMINATED VEHICLE GLAZING

• US 20100189996A1
• Filed: 06/05/2008
• Published: 07/29/2010
• Est. Priority Date: 06/06/2007
• Status: Active Grant

• Current Assignee: Pilkington Group Limited
• Original Assignee: Pilkington Group Limited
• Inventors: Barton, Neil, Torr, Ashley Carl
• Granted Patent: US 8,227,079 B2
• Time in Patent Office: Days
• US Class Current: 428/332
• CPC Class Codes: B32B 17/1011 having predetermined tint or excitation purity
• CPC Class Codes: B32B 17/10348 comprising an obscuration band
• CPC Class Codes: B32B 17/10761 containing vinyl acetal
• CPC Class Codes: C03C 3/087 containing calcium oxide, e.g. common sheet or container glass
• CPC Class Codes: C03C 3/095 containing rare earths
• CPC Class Codes: C03C 4/02 for coloured glass
• CPC Class Codes: G01S 2013/93276 in the windshield area
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/31601 Quartz or glass
• CPC Class Codes: Y10T 428/31616 Next to polyester [e.g., alkyd]
• CPC Class Codes: Y10T 428/31627 Next to aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/3163 Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]
• CPC Class Codes: Y10T 428/31645 Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31649 Ester, halide or nitrile of addition polymer

Abstract

A laminated vehicle glazing, suitable for use with an optical sensor (for example a LIDAR type sensor), comprises first and second plies of glazing material joined together by a ply of interlayer material between them, and either: a) the first ply is a pane of body-tinted glass having a colourant portion consisting of 0.70 to 1.00% by weight total iron (calculated as Fe₂O₃), 0 to 1.0% titania and 0 to 2.0% ceria, such that the glazing has a transmittance of at least 30% in the wavelength range 400 to 2100 nm, or b) the first ply of glazing material is a pane of body-tinted glass having a colourant portion consisting of 0.30 to 0.80 by weight total iron (calculated as Fe₂O₃), 0 to 1.0% titania (calculated as TiO₂) and 0 to 2.0% ceria (calculated as CeO₂), and the ply of interlayer material is a solar (IR) absorbing material, such that the glazing has a transmittance of at least 30% in the wavelength range 750 to 1300 nm.

Claims

1. A laminated vehicle glazing, suitable for use with an optical sensor, comprising:

first and second plies of glazing material joined together by a ply of interlayer material between them,

the first ply of glazing material being a pane of body-tinted glass having a colourant portion consisting of 0.70 to 1.00% by weight total iron (calculated as Fe₂O₃), 0 to 1.0% titania (calculated as TiO₂) and 0 to 2.0% ceria (calculated as CeO₂),

wherein the glazing has a transmittance of at least 30% in the wavelength range 400 to 2100 nm.

2. A laminated vehicle glazing as claimed in claim 1 wherein the glazing has a transmittance of at least 32% in the wavelength range 750 to 1300 nm.

5. A laminated vehicle glazing as claimed in claim 1 wherein the sensor is a light detection and ranging (LIDAR) type of sensor.

6. A laminated vehicle glazing as claimed in claim 1 wherein the glazing has a visible light transmittance (LT_A) greater than or equal to 70% and a total energy transmittance (TE) less than or equal to 60% at thicknesses greater than or equal to approximately 4.2 mm.

7. A laminated vehicle glazing as claimed in claim 6 wherein the glazing has a visible light transmittance (LT_A) greater than or equal to 75% and a total energy transmittance (TE) less than or equal to 60% at thicknesses greater than or equal to approximately 4.2 mm.

8. A laminated vehicle glazing as claimed in claim 1 wherein the pane of body-tinted glass has a thickness of less than 2.6 mm, preferably around 2.1 mm.

9. A laminated vehicle glazing as claimed in claim 1 wherein the second ply of glazing material is a pane of clear glass.

10. A laminated vehicle glazing as claimed in claim 9 wherein the pane of clear glass has a thickness of less than 2.6 mm.

11. A laminated vehicle glazing as claimed in claim 1 having an optical sensor mounted on its innermost surface.

12. A laminated vehicle glazing as claimed in claim 1 having a colour specified by the colour coordinates (D65, 10°

observer);

−

6≦

a*≦

−

2 and 0≦

b*≦

3.

13. A laminated vehicle glazing as claimed in claim 12 having a colour specified by the colour coordinates (D65, 10°

observer);

−

5≦

a*≦

−

3 and 0.5≦

b*≦

2.5.

14. Use of a laminated vehicle glazing as claimed in claim 1 as a windscreen.

15. A laminated vehicle glazing as claimed in claim 1 having a LIDAR type of sensor mounted on its innermost surface.

16. A laminated vehicle glazing as claimed in claim 9 wherein the pane of clear glass has a thickness of less than or equal to around 2.1 mm.

3. A laminated vehicle glazing, suitable for use with an optical sensor, comprising:

first and second plies of glazing material joined together by a ply of interlayer material between them,

the first ply of glazing material being a pane of body-tinted glass having a colourant portion consisting of 0.30 to 0.80% by weight total iron (calculated as Fe₂O₃), 0 to 1.0% titania (calculated as TiO₂) and 0 to 2.0% ceria (calculated as CeO₂), and

the ply of interlayer material being a solar absorbing material,

wherein the glazing has a transmittance of at least 30% in the wavelength range 750 to 1300 nm.

4. A laminated vehicle glazing as claimed in claim 3 wherein the glazing has a transmittance of at least 35% in the wavelength range 750 to 1300 nm.