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Optical assembly and method of manufacturing an optical assembly

A technology of optical components and optical sensors, applied in optical components, optics, photometry, etc., can solve problems such as difficult detection, undetectable windshield wetting, uneven sensitivity, etc., and achieve reliable detection effects

Pending Publication Date: 2020-02-21
BCS AUTOMOTIVE INTERFACE SOLUTIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the lens plates known from the prior art, the sensitivity to light extraction is not uniform in the measurement area, but generally has the shape of a Gaussian distribution (i.e., with a distinct maximum in the center and a sharp decrease towards the edges)
Wetting at the edges of the measurement area thus leads to a significantly lower drop in the light intensity of the reflected light than wetting in the central part of the measurement area and is therefore more difficult to detect
Therefore, it is not possible to reliably detect the wetting of the windshield over the entire measurement area

Method used

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  • Optical assembly and method of manufacturing an optical assembly
  • Optical assembly and method of manufacturing an optical assembly
  • Optical assembly and method of manufacturing an optical assembly

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Embodiment Construction

[0036] figure 1 A sensor arrangement 10 from the prior art is shown, which in the variant shown here is in the form of a rain sensor for a motor vehicle.

[0037]The sensor device 10 comprises an optical assembly 12 mounted via a coupling layer 14 to a window panel 16, more particularly a windshield of a motor vehicle. Here, the coupling layer 14 preferably has a similar refractive index to that of the window pane 16 .

[0038] The optical assembly 12 includes a light source 18 , a light receiving unit 20 and a lens plate 22 .

[0039] On the light source side, the lens plate 22 comprises a first lens structure 24 ′, which is arranged on the side of the lens plate 22 associated with the light source 18 . In addition, the lens plate 22 comprises, on the light source side, light extraction structures 26 arranged on the side of the lens plate 22 associated with the window plate 16 .

[0040] Preferably, the light source 18 is here arranged at the focal point of the first lens ...

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Abstract

The present invention relates to an optical assembly and a method for manufacturing an optical assembly. The present invention provides an optical sensor device (10) for a motor vehicle. The optical assembly (12) for an optical sensor device (10) has a lens plate (22), a light source (18), and a light receiving unit (20). The lens plate (22) includes a lens structure (24) on a side associated withthe light source and a light extraction structure (26) on a side facing away from the light source (18). The lens structure (24) has different local radii of curvature. The present invention furtherprovides a method for manufacturing the optical assembly (12).

Description

technical field [0001] The invention relates to an optical component for an optical sensor device, in particular for a motor vehicle, and to a method for producing the optical component. Background technique [0002] Optical sensor devices are used in motor vehicles, for example as rain sensors for detecting wetting of windshields. [0003] Such rain sensors typically include a light source, a lens plate secured to the windshield, and a light receiver. The lenticular plate typically has lens structures on the side associated with the light source and light extraction structures on the side facing away from the light source. [0004] Light emitted by the light source enters or is coupled into the lens plate through the lens structure, wherein the light rays propagate substantially parallel within the lens plate. The light extraction structure then deflects the light rays by about 45 degrees towards the measurement area on the windshield. When the pane is dry, the light is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G01J1/04G01J1/06
CPCG01N21/84G01J1/04G01J1/06G01J1/0411G01J1/42G01J1/0204G02B3/08G01J1/08F21V5/045
Inventor 劳拉·霍兰乌尔里希·巴克斯
Owner BCS AUTOMOTIVE INTERFACE SOLUTIONS GMBH