20-06-2013 дата публикации
Номер: US20130154466A1
The invention describes a lamp (A, B, C, D) comprising a glass envelope () enclosing a light generating means (), and an axially and/or circumferentially graded absorption coating (A, B, C, D) applied to a surface of the glass envelope (), wherein the graded absorption coating (A, B, C, D) exhibits a smooth transition in a transition region (A, C, D) from a first coated region ( A, B, C, D) on the glass envelope () to a second coated region (A, B, C, D) on the glass envelope (). The invention further describes a lighting assembly () comprising a lamp according to any of claims to and a reflector () for collecting and shaping any light passing through the graded absorption coating (A, B, C, D) of the lamp (A, B, C, D). The invention also describes a method of manufacturing a lamp (A, B, C, D) comprising a glass envelope () enclosing a light generating means (), which method comprises applying an axially and/or circumferentially graded absorption coating (A, B, C, D) to a surface of the glass envelope () such that the graded absorption coating (A, B, C, D) exhibits a smooth transition in a transition region (A, B, C, D) from a first coated region (A, B, C, D) to a second coated region (A, B, C, D). 1. An automotive front lamp comprising a glass envelope enclosing a light generating means , and an axially and/or circumferentially graded absorption coating applied to a surface of the glass envelope , wherein the graded absorption coating exhibits a smooth transition in a transition region from a first coated region on the glass envelope to a second coated region on the glass envelope.2. A lamp according to claim 1 , wherein the first coated region and the second coated region differ in layer thickness and/or particle density and/or layer count and/or colour.3. A lamp according to claim 1 , wherein the graded absorption coating has a thickness in the range 200 nm to 500 nm in the first coated region and in the range 500 nm to 1000 nm in the second coated region.4. A lamp ...
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