Lidar assembly for automotive applications comprising anti reflection unit
An anti-reflection and maneuverable technology, applied in the direction of reflection/re-radiation of radio waves, utilization of re-radiation, and re-radiation of electromagnetic waves, etc. Increased production costs and vehicle energy consumption, less efficient, etc.
Pending Publication Date: 2022-01-21
AGC GLASS EUROPE SA
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Problems solved by technology
Taking into account the LiDAR's field of view makes the design of such specific anti-reflective coatings more complex and less efficient
Furthermore, applying an anti-reflective coating involves additional production costs and may affect the mechanical protection, chemical resistance or heat resistance of the transparent sash
[0012] With the development of ADAS and autonomous vehicles requiring a large number of detection systems, it is unacceptable to increase the power of LiDAR devices installed in the interior of motor vehicles to overcome the intensity of infrared radiation caused by the reflection of the inner surface of the transparent sash losses, as this would increase production costs and vehicle energy consumption to unacceptable levels
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[0036] Such as image 3 , Figure 4 with Image 6 As shown, the invention relates to a motor vehicle comprising a LiDAR and more particularly a solid-state light detection and ranging (LiDAR) device (2) configured to emit an IR beam centered on an axis of incidence (i0). Motor vehicles include cars, vans, trucks, motorcycles, buses, streetcars, trains, planes, helicopters, and more. The LiDAR device is located in the interior environment of the vehicle, facing the inner surface (1i) of a transparent sash (1), according to the invention, having a refractive index n1 and comprising an outer surface (1o) facing the outer environment and Separated from the inner surface (1i) by the thickness of the transparent sash (1). According to the invention, the sashes can be transparent or opaque to light transmission as required by the glass (window or pillar), but have IR transparent parts for positioning the LiDAR device. At least a portion of the transparent grid (1) (in this particu...
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Abstract
The present invention concerns an automotive vehicle comprising, a) a pane (1) having a refractive index (n1), b) a Light Detection and Ranging (LiDAR) device (2) located in the interior environment and facing the inner surface (1i) of the pane (1), and c) an anti-reflection unit (3), made of a material of refractive index (n3), coupling the LiDAR device to the inner surface (1i) of the transparent pane (1), and having a mean absorption coefficient (k) in the wavelength range from 750 nm to 1650 nm lower than 5 m-1(i.e., k <= 5 m-1), comprising an interfacial surface (31) coupled in intimate contact with the inner surface (1i) of the transparent pane (1) and comprising a surface (32) coupled to the LiDAR device (2), forming the angle (theta) with the interfacial surface (31) and which normal forms the angle (phi) with the incident axis (i0), wherein (phi) is comprised between -30 degrees and +30 degrees.
Description
technical field [0001] The invention belongs to the field of detection devices suitable for use in motor vehicles for assisting drivers (ADAS=Advanced Driver Assistance System, Advanced Driver Assistance System), including autonomous vehicles or self-driving vehicles. More specifically, the present invention relates to a LiDAR device facing the inner surface of a sash, which may be transparent (such as a windshield or sidelights, rear lights) or opaque (such as for car pillars). The LiDAR forms an angle α1 with the vertical line. The present invention reduces the portion of infrared radiation emitted by LiDAR devices, and more particularly new generation LiDARs such as solid-state LiDAR devices, that is reflected when passing through the inner surface of a sash (transparent or opaque). Background technique [0002] Motor vehicles are being equipped with more and more systems to assist the driver of the vehicle. These systems are collectively referred to as ADAS (Advanced ...
Claims
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IPC IPC(8): G01S17/931G01S13/931B60R11/00
CPCG01S2013/93276G01S17/931B60Q1/0023B60R11/00B60R2011/0026
Inventor 李美洁Y·萨尔特纳尔F·德康普斯
Owner AGC GLASS EUROPE SA