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US 2021/0278685 A1Published application
Optical path length extender
AssigneeAvegant Corp.
InventorsAllan Thomas Evans, Andrew John Gross, D. Scott Dewald
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Abstract
A digital light path length modulator comprises an optical path length extender (OPLE) and a polarization modulator. The OPLE comprises two light paths having different path lengths, such that light having a first polarization is directed through a first light path, and the light having a second polarization is directed through a second light path.
Claims21
A system to adjust light path length comprising a digital light path length modulator, the digital light path length modulator comprising:
- a polarization modulator to receive polarized light and to modulate a polarization of some or all of the polarized light;
- and
- an optical path length extender (OPLE) having an entry surface and an exit surface, to direct the light entering the OPLE with a first polarization through the entry surface and along a first light path through the OPLE to exit through the exit surface, and to direct the light entering the OPLE with a second polarization through the entry surface and along a second light path through the OPLE to exit through the exit surface, the second light path through the OPLE having a light path length two or more times longer than the first light path length through the OPLE, wherein the OPLE is shaped.
A system comprising:
- an optical path length extender (OPLE) having two light paths having different path lengths, such that light entering the OPLE with a first polarization is directed through a first light path, and light entering the OPLE with a second polarization is directed through a second light path having a light path length two or more times longer than the first light path length through the OPLE, the OPLE being shaped.
An optical path length extender (OPLE) comprising:
- an entry surface;
- an exit surface;
- a first light path for light entering the OPLE with a first polarization at the entry surface, the first light path exiting the OPLE at the exit surface;
- and
- a second light path for light entering the OPLE with a second polarization at the entry surface, the second light path exiting the OPLE at the exit surface;
- wherein the second light path is more than two times as long as the first light path through the OPLE, wherein the OPLE is shaped.
3 more elements
Dependencies are inferred from the claim text.