Polarization conversion using polarization volume grating
AssigneeMicrosoft Technology Licensing, LLC
InventorOnur Can Akkaya
Life of this patent
Estimating the term…
Abstract
One example provides an optical device, comprising a light source configured to output unpolarized light, a polarizing beam splitter configured to split the unpolarized light into light of a first polarization state and light of a second polarization state and a polarization volume grating configured to receive the light of the first polarization state and the light of the second polarization state, and transmit the light of the first polarization state without changing the light of the first polarization state to a different polarization state, and convert the light of the second polarization state to the first polarization state, thereby forming polarized output light.
Claims20
An optical device, comprising:
- a light source configured to output unpolarized light;
- a polarizing beam splitter configured to split the unpolarized light into light of a first polarization state and light of a second polarization state;
- and
- a polarization volume grating configured to
- receive the light of the first polarization state and the light of the second polarization state,
- transmit the light of the first polarization state without changing the light of the first polarization state to a different polarization state and without changing a direction of the light of the first polarization state by diffraction, and convert the light of the second polarization state to the first polarization state and change the direction of the light of the second polarization state by diffraction, thereby forming polarized output light.
Enacted on an optical device, a method comprising:
- emitting unpolarized light from a light source;
- passing the unpolarized light through a polarizing beam splitter, thereby splitting the unpolarized light into light of a first polarization state and light of a second polarization state;
- and
- passing the light of the first polarization state and the light of the second polarization state through a polarization volume grating configured to transmit the light of the first polarization state without changing the light of the first polarization state to a different polarization state and without changing a direction of the light of the first polarization state by diffraction, and convert the light of the second polarization state to the first polarization state and change the direction of the light of the second polarization state by diffraction, thereby forming polarized output light.
An optical device, comprising:
- a light source configured to output unpolarized light;
- a first polarization grating comprising a polarizing beam splitter configured to split the unpolarized light into light of a first polarization state and light of a second polarization state;
- a polarization volume grating configured to
- receive the light of the first polarization state and the light of the second polarization state,
- transmit the light of the first polarization state without changing the light of the first polarization state to a different polarization state and without changing a direction of the light of the first polarization state by diffraction, and convert the light of the second polarization state to the first polarization state and change the direction of the light of the second polarization state by diffraction, thereby forming polarized output light;
- and
- a second polarization grating optically downstream of the polarization volume grating to redirect the polarized output light.
Dependencies are inferred from the claim text.