Invention Grant
- Patent Title: Lighting apparatus for vehicles
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Application No.: US15506033Application Date: 2015-08-12
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Publication No.: US10174900B2Publication Date: 2019-01-08
- Inventor: Michael Schöne
- Applicant: Hella KGaA Hueck & Co.
- Applicant Address: DE Lippstadt
- Assignee: Hella GmbH & Co. KGaA
- Current Assignee: Hella GmbH & Co. KGaA
- Current Assignee Address: DE Lippstadt
- Agency: Husch Blackwell LLP
- Priority: DE102014112937 20140909
- International Application: PCT/EP2015/068582 WO 20150812
- International Announcement: WO2016/037789 WO 20160317
- Main IPC: F21S41/275
- IPC: F21S41/275 ; G02B27/42 ; F21S41/143 ; F21S41/663 ; G02B13/14

Abstract:
A lighting apparatus for vehicles with a number of semiconductor-based light sources and a projection device for generating the specified light distribution with a cut-off line. The projection device features a correction device with at least two lenses. The surface of at least one of the lenses is designed as a diffractive lens surface for achromatization in a visible wavelength range. The two lenses are made from different lens materials. The surfaces of at least two lenses are designed as refractive lens surfaces that have their optical power calculated based on a temperature range and/or expansion coefficient of the lens material of at least two lenses such that adding the optical power of the lenses yields a predefined total optical power of the correction device.
Public/Granted literature
- US20170307165A1 LIGHTING APPARATUS FOR VEHICLES Public/Granted day:2017-10-26
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