Vehicle glazing and associated device with near-infrared vision system

1 . A vehicle glazing, comprising:

a first glass sheet forming an exterior glazing, with a first external main face oriented towards an exterior environment of a vehicle and a second internal main face oriented toward a passenger compartment of the vehicle,

a lamination interlayer made of polymer material with a first main face oriented toward the second internal main face and with a second main face opposite the first main face,

a second glass sheet intended to be the interior glazing with a third external main face on a side of the second internal main face and a fourth internal main face oriented toward the passenger compartment,

at least one first zone that forms an infrared transmission zone transparent at at least a first working wavelength in the infrared region which is 905 nm±30 nm and/or at least a second working wavelength in the infrared region which is 1550 nm±30 nm, or both at said first working wavelength and said second working wavelength,

an opaque masking layer on the second internal main face or on the first main face of the lamination interlayer and the opaque masking layer is absent at least in a central zone in line with the infrared transmission zone or has a gap in line with the infrared transmission zone,

wherein in said infrared transmission zone, the glazing comprises opposite the first external main face:

a) an anti-reflective coating at the first working wavelength with a thickness which is 165 nm±50 nm and in the infrared transmission zone the glazing with the anti-reflective coating has a total transmission of at least 85% at the first working wavelength,

b) or an anti-reflective coating at the second working wavelength with a thickness which is 275 nm±50 nm and in the infrared transmission zone the glazing with said anti-reflective coating has a total transmission of at least 85% at the second working wavelength.

2 . The vehicle glazing according to claim 1 , wherein for a), said anti-reflective coating has a total transmission of at least 90% at the first working wavelength at the angle of incidence of 0° and a total transmission of at least 80% at the angle of incidence of 60°,

or for b), said anti-reflective coating has a total transmission of at least 90% at the second working wavelength at the angle of incidence of 0° and a total transmission of at least 80% at the angle of incidence of 60° at LB2.

3 . The vehicle glazing according to claim 1 , wherein for a), said anti-reflective coating has a reflection of at most 7% at the first working wavelength at the angle of incidence of 8°

or for b), said anti-reflective coating has a reflection of at most 7% at the second working wavelength at the angle of incidence of 8°.

4 . The vehicle glazing according to claim 1 , wherein the anti-reflective coating comprises a layer of porous silica.

5 . The vehicle glazing according to claim 1 , wherein the anti-reflective coating comprises a chemical protection underlayer with a functional layer of porous silica positioned on top.

6 . The vehicle glazing according to claim 1 , wherein the anti-reflective coating is on a substrate and

the substrate is selected from among:

i) the second glass sheet, the anti-reflective coating on the fourth internal main face bare or coated with a functional coating,

or j) a piece, the anti-reflective coating on a free face of the transparent piece at said first working wavelength or at said second working wavelength, or both at first working wavelength and at said second working wavelength, said piece being under or in a through-hole of the second glass sheet, or both,

or k) the first glass sheet, the anti-reflective coating on the second internal main face, bare or coated with a functional coating, the lamination interlayer being perforated by an interlayer through-hole in line with a through-hole of the second glass sheet.

7 . The vehicle glazing according to claim 6 , wherein in configuration j), the piece is on the lamination interlayer or adhered to the second internal main face with the lamination interlayer perforated by an interlayer through-hole in line with said through-hole.

8 . The vehicle glazing according to claim 6 , wherein in configuration j), the piece is made of glass that is extra clear.

9 . The vehicle glazing according to claim 6 wherein in configuration j), the piece is made of glass with a thickness of at most 2.2 mm and of at least 0.1 mm.

10 . The vehicle glazing according to claim 1 , wherein the infrared transmission zone is in a peripheral region of the glazing.

11 . The vehicle glazing according to claim 1 , wherein the infrared transmission zone is centimetric.

12 . The vehicle glazing according to claim 1 , further comprising another infrared transmission zone disjoined from the infrared transmission zone, the anti-reflective coating a) or b) is an anti-reflective coating common to these two infrared transmission zones.

13 . The vehicle glazing according to claim 1 , further comprising a transparent heating electrically conductive layer, transparent at said first working wavelength or at said second working wavelength, or both at said first working wavelength and at said second working wavelength, and which is located from the infrared transmission zone.

14 . A device, comprising:

said vehicle glazing according to claim 1 ,

an infrared vision system at said first working wavelength or at said second working wavelength, or both at said first working wavelength and at said second working wavelength, disposed in the passenger compartment behind said vehicle glazing so as to send or receive, or both send and receive, radiation after passing through the vehicle glazing at the infrared transmission zone.

15 . The vehicle glazing according to claim 1 , wherein the vehicle glazing is a glazing of a road or railway vehicle.

16 . The vehicle glazing according to claim 1 , wherein the anti-reflective coating comprises a chemical protection underlayer, which is a dense silica layer, with a functional layer of porous silica positioned on top.

17 . A vehicle glazing, comprising:

a first glass sheet forming an exterior glazing, with a first external main face oriented towards an exterior environment of a vehicle and a second internal main face oriented toward a passenger compartment of the vehicle,

a lamination interlayer made of polymer material with a first main face oriented toward the second internal main face and with a second main face opposite the first main face,

a second glass sheet forming an interior glazing with a third external main face on a side of the second internal main face and a fourth internal main face oriented toward the passenger compartment,

at least one first zone that forms an infrared transmission zone transparent at at least a first working wavelength in the infrared region which is 905 nm±30 nm or at least a second working wavelength in the infrared region which is 1550 nm±30 nm, or both at said first working wavelength and said second working wavelength,

an opaque masking layer in on the fourth internal main face of the second glass sheet and the opaque masking layer is absent at least in a central zone in line with the infrared transmission zone or has a gap in line with the infrared transmission zone,

wherein in said infrared transmission zone, the glazing comprises opposite the first external main face:

a) an anti-reflective coating at the first working wavelength with a thickness which is 165 nm±50 nm and in the infrared transmission zone the glazing with the anti-reflective coating has a total transmission of at least 85% at the first working wavelength,

b) or an anti-reflective coating at the second working wavelength with a thickness which is 275 nm±50 nm and in the infrared transmission zone the glazing with said anti-reflective coating has a total transmission of at least 85% at the second working wavelength.

18 . A vehicle glazing, comprising:

a first glass sheet forming an exterior glazing, with a first external main face oriented towards an exterior environment of a vehicle and a second internal main face oriented toward a passenger compartment of the vehicle,

at least one first zone that forms an infrared transmission zone transparent at at least a first working wavelength in the infrared region which is 905 nm±30 nm or at least a second working wavelength in the infrared region which is 1550 nm±30 nm, or both at said first working wavelength and said second working wavelength,

wherein in said infrared transmission zone, the glazing comprises opposite the first external main face:

a) an anti-reflective coating at the first working wavelength with a thickness which is 165 nm±50 nm and in the infrared transmission zone the glazing with the anti-reflective coating has a total transmission of at least 85% at the first working wavelength,

b) or an anti-reflective coating at the second working wavelength with a thickness which is 275 nm±50 nm and in the infrared transmission zone the glazing with said anti-reflective coating has a total transmission of at least 85% at the second working wavelength, and wherein in the infrared transmission zone with the anti-reflective coating, the vehicle glazing comprises on the second internal main face side a selective filter absorbent in the visible region and transparent at said first working wavelength or at said second working wavelength, or both at said first working wavelength and at said second working wavelength, the vehicle glazing having a total transmission of no more than 10.0% in the visible region.

19 . The vehicle glazing according to claim 18 , wherein the selective filter is a camouflaging coating and the anti-reflective coating is distant from the second internal main face.

20 . A vehicle glazing, comprising:

a first glass sheet forming an exterior glazing, with a first external main face oriented towards an exterior environment of a vehicle and a second internal main face oriented toward a passenger compartment of the vehicle,

a lamination interlayer made of polymer material with a first main face oriented toward the second internal main face and with a second main face opposite the first main face,

a second glass sheet forming an interior glazing with a third external main face on a side of the second internal main face and a fourth internal main face oriented toward the passenger compartment,

at least one first zone that forms an infrared transmission zone transparent at at least a first working wavelength in the infrared region which is 905 nm±30 nm or at least a second working wavelength in the infrared region which is 1550 nm±30 nm, or both at said first working wavelength and said second working wavelength,

on the second internal main face of the first glass sheet or the third external main face of the second glass sheet, a functional layer extending over all or part of the glazing, which is an electrically conductive layer that is transparent or an opaque masking layer, which functional layer is absorbent at said first working wavelength or at said second working wavelength, or both at said first working wavelength and at said second working wavelength, and which is absent from the infrared transmission zone at least in a central zone in line with the infrared transmission zone,

wherein in said infrared transmission zone, the glazing comprises opposite the first external main face:

a) an anti-reflective coating at the first working wavelength with a thickness which is 165 nm±50 nm and in the infrared transmission zone the glazing with the anti-reflective coating has a total transmission of at least 85% at the first working wavelength,

b) or an anti-reflective coating at the second working wavelength with a thickness which is 275 nm±50 nm and in the infrared transmission zone the glazing with said anti-reflective coating has a total transmission of at least 85% at the second working wavelength.