Reflecting apparatus including enhanced aluminum optical coatings

Patent metadata

Field	Value
Publication number	US-9611999-B2
Application number	US-201414336156-A
Country	US
Kind code	B2
Filing date	Jul 21, 2014
Priority date	Jul 21, 2014
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

A multi-reflector lighting apparatus including a reflector having a reflecting layer deposited on a base layer. The multi-reflector lighting apparatus further includes a first oxide layer deposited on the reflecting layer. The multi-reflector lighting apparatus further includes a second oxide layer deposited on the first oxide layer. The multi-reflector lighting apparatus further includes an alternating plurality of a relatively low refractive index oxide layer material and a relatively high refractive index oxide layer material deposited on the second oxide layer.

First claim

We claim:

1. A reflector lighting apparatus, comprising:
an LED array light source;
a reflector having a aluminum reflecting layer deposited on a base layer; and
a thin-film layered stack positioned directly adjacent the aluminum reflecting layer, wherein the thin-film layered stack includes an even number of layers of 26 or more layers;
the thin-film layered stack comprising:
a first oxide layer deposited on the aluminum reflecting layer;
a second oxide layer deposited on the first oxide layer; and
an alternating plurality of a relatively low refractive index oxide layer material and a relatively high refractive index oxide layer material deposited on the second oxide layer;
wherein the first oxide layer comprises a relatively high refractive index oxide material, and wherein a final layer of the thin-film layered stack comprises a relatively low refractive index oxide material.

2. The apparatus of claim 1 , wherein the relatively high refractive index oxide layer material has a thickness of about 30 nm to about 200 nm, and the relatively low refractive index oxide layer material has a thickness of from 50 nm to 300 nm.

Assignees

• Ge Lighting Solutions Llc

Inventors

• Cai Dengke
• Mayer Mark J
• Saha Koushik
• Ward Benjamin James
• Zhao Tianji

Classifications

• G02B5/0833 Primary

  comprising inorganic materials only · CPC title

• G02B5/08 Primary

  Mirrors {(vehicle mirrors involving special optical features B60R1/08)} · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• F21K9/233

  specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps · CPC title

• F21V7/28

  characterised by coatings · CPC title