LiDAR assembly for automotive applications comprising an anti reflection unit

An automotive vehicle, comprising:

• (a) a pane having a refractive index, n1, and
• comprising an inner surface facing an interior environment and an outer surface facing an exterior environment,
• having at least one portion with a mean absorption coefficient (k) in a wavelength range from 750 nm to 1650 nm lower than 5 m−1 (i.e., a≤5 m−1), and wherein,
• the inner surface of the transparent pane forms a tilting angle α1 with a vertical direction larger than 10° (a1>) 10°;
• (b) a Light Detection and Ranging (LiDAR) device located in the interior environment and facing the inner surface, configured for emitting an IR beam centred on an incident axis (i0) forming an angle (φ+θ) with a normal to the inner surface, passing through the transparent pane, and propagating in the exterior environment along a trajectory centred on a refracted axis (ir) forming an angle a with a normal to the outer surface;
• and
• (c) an anti-reflection unit,
• made of a material of refractive index, n3, coupling the LiDAR device to the inner surface of the transparent pane,
• having a mean absorption coefficient (k) in a wavelength range from 750 nm to 1650 nm lower than 5 m−1 (i.e., k≤5 m−1),
• comprising an interfacial surface coupled in intimate contact with the inner surface of the transparent pane and
• comprising a first surface coupled to the LiDAR device, forming the angle θ with the interfacial surface and which normal forms the angle φ, with the incident axis, wherein φ is between −30° and +30°.