Glass for autonomous car
The invention concerns an automotive glazing comprising (i) at least one glass sheet having an absorption coefficient lower than 5 m −1 in the wavelength range from 1051 nm to 1650 nm and having an external face and an internal face, and (ii) an infrared filter. According to the present invention, an infrared-based remote sensing device in the wavelength range from 1051 nm to 1650 nm, is placed on the internal face of the glass sheet in a zone free of the infrared filter layer.
1. A glazing comprising:
a glass sheet having an absorption coefficient lower than 5 m −1 in a wavelength range from 1051 nm to 1650 nm and having an external face and an internal face, and
an infrared filter,
wherein an infrared-based remote sensing device in the wavelength range from 1051 nm to 1650 nm, is placed on the internal face of the glass sheet in a zone free of the infrared filter layer.
2. The glazing according to claim 1 wherein the glass sheet has an absorption coefficient lower than 1 m −1 .
3. The glazing according to claim 1 , wherein the infrared-based remote sensing device is optically coupled to the internal face of the glazing.
4. The glazing according to claim 1 , wherein the glazing is a laminated glazing comprising the glass sheet, which is an exterior glass sheet, and an interior glass sheet laminated with at least one thermoplastic interlayer and wherein the exterior and an interior glass sheets are high level of near infrared radiation transmission glass sheets having an absorption coefficient lower than 5 m −1 and wherein the infrared-based remote sensing device is placed on face 4 .
5. The glazing according to claim 1 , having a value of visible light transmission that is lower than the glazing's value of near infrared transmission.
6. The glazing according to claim 1 , wherein the glass sheet is covered with at least one near-infrared transparent coating that absorbs and/or reflects visible light.
7. The glazing according to claim 1 , wherein the glass sheet comprises a content, expressed as the total weight of glass percentages:
total iron (expressed as Fe 2 O 3 ) 0.002 to 0.06%; and
Cr 2 C 3 0.0001 to 0.06%.
8. The glazing, according to claim 1 , wherein the glass sheet comprises a content, expressed as the total weight of glass percentages:
total iron (expressed as Fe 2 O 3 ) 0.002 to 0.06%;
Cr 2 O 3 0.0015 to 1%; and
Co 0.0001 to 1%.
9. The glazing according to claim 1 , wherein the glass sheet comprises a content, expressed as the total weight of glass percentages:
total iron (expressed as Fe 2 O 3 ) 0.02 to 1%;
Cr 2 O 3 0.002 to 0.5%; and
Co 0.0001 to 0.5%.
10. The glazing according to claim 1 , wherein the glass sheet comprises a content, expressed as the total weight of glass percentages:
total iron (expressed as Fe 2 O 3 ) from 0.002 to 1%;
Cr 2 O 3 0.001 to 0.5%;
Co 0.0001 to 0.5%; and
Se 0.0003 to 0.5%.
11. The glazing according to claim 1 , wherein the infrared filter layer is a multilayer stack comprising:
a functional layers of a material reflecting infrared radiation, with n≥1, and
n+1 dielectric coatings such that each functional layer is surrounded by dielectric coatings.
12. The glazing according to claim 1 , wherein the infrared filter layer is silver-based.
13. The glazing according to claim 1 , wherein the infrared filter layer is a coating wherein the zone free infrared filter is provided on which the infrared-based remote sensing device is placed.
14. The glazing according to claim 1 , wherein the infrared-based remote sensing device is a LIDAR system based on scanning, rotating, flashing or solid state LiDARs and enabling of 3D mapping the surroundings around the vehicle.
15. The glazing according to claim 1 , wherein an anti-reflective coating is provided on a surface of the glazing.
16. The glazing according to claim 1 , wherein the glazing is a windshield.
17. The automotive glazing according to claim 1 , wherein the infrared filter comprises a coating deposited on the glass sheet.
18. The automotive glazing according to claim 1 , wherein the glass sheet has an absorption coefficient lower than 5 m −1 and greater than 1 m −1 .
19. The automotive glazing according to claim 1 , further comprising a second glass sheet laminated to the glass sheet with at least one thermoplastic interlayer, wherein the second glass sheet has an absorption coefficient lower than 5 m −1 .
20. An automotive glazing comprising:
a. a first glass sheet having an absorption coefficient lower than 5 m −1 and greater than 1 m −1 in a wavelength range from 1051 nm to 1650 nm,
b. an infrared filter,
c. a thermoplastic interlayer,
d. a second glass sheet having an absorption coefficient lower than 5 m −1 in a wavelength range from 1051 nm to 1650 nm, and
e. an infrared-based remote sensing device in a wavelength range from 1051 nm to 1650 nm placed on face 4 of the second glass sheet in a zone free of the infrared filter,
wherein the first glass sheet, the second glass sheet, and the thermoplastic interlayer are laminated together.