Imaging System With Optimized Extended Depth of Focus
US-2015370066-A1 · Dec 24, 2015 · US
Display comprising an optical waveguide and switchable diffraction gratings and method of producing the same
US9664824B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9664824-B2 |
| Application number | US-201314650682-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 2, 2013 |
| Priority date | Dec 10, 2012 |
| Publication date | May 30, 2017 |
| Grant date | May 30, 2017 |
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Abstract
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An apparatus is disclosed for producing an optical display comprising an optical waveguide ( 1 ) and a pair ( 10, 16 ) of switchable diffraction gratings that are switchable between a diffractive state and a non-diffractive state. A pair of non-switchable diffraction gratings ( 2, 14 ) is arranged to receive diffract light from one switchable grating for guided propagation along the optical waveguide and out to the other switchable grating for viewing. The pair of non-switchable gratings are tuned to a first operating wavelength of light, while the pair of switchable gratings are tuned to a different operating wavelength of light to diffract that light into/from a field of view in common with that of the non-switchable gratings such that light of two wavelengths occupies the same field of view.
First claim
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The invention claimed is: 1. An apparatus for producing an optical display comprising: an optical waveguide; a first switchable diffractive part arranged adjacent to an external front surface of an input portion of said optical waveguide, said first switchable diffractive part switchable between a diffractive state for diffracting light of a first wavelength and a non-diffractive state, and arranged to receive light and selectively to diffract the light into said optical wavegui…
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Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
Physics · mapped topic
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- What does patent US9664824B2 cover?
- An apparatus is disclosed for producing an optical display comprising an optical waveguide ( 1 ) and a pair ( 10, 16 ) of switchable diffraction gratings that are switchable between a diffractive state and a non-diffractive state. A pair of non-switchable diffraction gratings ( 2, 14 ) is arranged to receive diffract light from one switchable grating for guided propagation along the optical wav…
- Who is the assignee on this patent?
- Bae Systems Plc
- What technology area does this patent fall under?
- Primary CPC classification G02B5/1828. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 30 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).