US 12,222,081 B2
Illumination device for vehicles
Daniel Thomae, Jena (DE); Roman Kleindienst, Weimar (DE); Christoph Erler, Jena (DE); Petr Vojtisek, Jena (DE); and Alexandre Gatto, Bergisch Gladbach (DE)
Assigned to Carl Zeiss Jena GmbH, Jena (DE)
Filed by Carl Zeiss Jena GmbH, Jena (DE)
Filed on Jun. 15, 2022, as Appl. No. 17/840,825.
Application 17/840,825 is a continuation of application No. 16/756,148, granted, now 11,391,435, previously published as PCT/EP2018/078420, filed on Oct. 17, 2018.
Claims priority of application No. 102017124296.1 (DE), filed on Oct. 18, 2017.
Prior Publication US 2022/0307669 A1, Sep. 29, 2022
Int. Cl. F21S 43/236 (2018.01); F21S 43/249 (2018.01); G02B 5/32 (2006.01); G02B 27/09 (2006.01)
CPC F21S 43/236 (2018.01) [F21S 43/249 (2018.01); G02B 5/32 (2013.01); G02B 27/0944 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A light-emitting device for a vehicle, comprising:
a light-guiding body;
a light source arrangement configured to emit light in the direction of a first half-space and into the light-guiding body;
a reflection hologram attached to the light-guiding body and configured to produce a light-emission signature during illumination in a direction that faces in a second half-space located opposite the first half-space; and
a diffractive element attached to the light-guiding body and configured to receive the light from the light source arrangement and redirect the light for illumination of the hologram, the diffractive element including a first surface and a second surface,
wherein the second surface of the diffractive element and a surface of the reflection hologram that receives light redirected by the diffractive element are arranged in the same plane, and
wherein the diffractive element is configured to redirect the light for illumination of the hologram via a single reflection of the light received from the light source arrangement.