Patent · US Active

Angle-insensitive spectral filter

US9880330B1 · kind B1 · utility

0Cited by

2References

20Claims

0Family size

Assignee

ABeam Technologies, Inc. · US

Inventors

Alexander Koshelev · Redmond, US
Keiko Munechika · Oakland, US

Key dates

Filing date	Sep 6, 2016
Grant date	Jan 30, 2018
Priority date	—
Expiry date	Oct 6, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH10F39/12
WIPO fieldOptics
WIPO sectorInstruments

Abstract

In one embodiment, an optical element includes a first semi-transparent semi-reflective layer and a second semi-transparent semi-reflective layer. The optical element includes a first transparent material having a first refractive index and disposed between the first semi-transparent semi-reflective layer and the second semi-transparent semi-reflective layer. The optical element includes a second transparent material having a second refractive index, disposed between the first semi-transparent semi-reflective layer and the second semi-transparent semi-reflective layer, and surrounding the first transparent material in a plane parallel to the first semi-transparent semi-reflective layer and the second semi-transparent semi-reflective layer. The first refractive index is higher than the second refractive index.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.