US 2026/0235873 A1Published application

Optical apparatus, modules and devices

AssigneeNokia Technologies Oy

InventorsToni Johan JÄRVENPÄÄ, Marja Pauliina SALMIMAA

Life of this patent

Estimating the term…

Loading patent…

Abstract

Examples of the disclosure relate to optical apparatus for providing a uniform output for different wavelengths of light. The apparatus can comprise a light guide. The light guide can comprise a first layer and a second layer and an interface between the layers. The first layer comprises an in-coupler configured and an out-coupler. The interface between the first layer and the second layer comprises a beamsplitter arranged to split beams of light. The interface is arranged to retain in-coupled light of a first wavelength range in the first layer and split beams of light of a second wavelength range so that part of the in-coupled light of the second wavelength range is reflected into the layer from which the light has travelled and part of the in-coupled light of the second wavelength range passes into the other layer.

Claims18

Dependent claims

An apparatus comprising:

a light guide, comprising at least a first layer and a second layer and an interface between the first layer and the second layer wherein;
the first layer of the light guide, comprising an in-coupler configured to in-couple one or more input beams of light into the first layer and an out-coupler configured to out-couple the one or more input beams of light from the light guide, wherein the one or more input beams of light comprise light of a first wavelength range and light of a second wavelength range;
and
the interface between the first layer and the second layer, comprising a beamsplitter arranged to split beams of light of the second wavelength range so that the interface is arranged to:
retain in-coupled light of the first wavelength range in the first layer;
and
split beams of light of the second wavelength range so that part of in-coupled light of the second wavelength range is reflected into the layer from which the light has travelled and part of the in-coupled light of the second wavelength range passes into the other layer.

4 more elements

Dependencies are inferred from the claim text.