Meta illuminator
Provided are meta illuminators. The meta illuminators according to embodiments include a first light emitter configured to emit pattern light, and a second light emitter configured to emit non-patterned light, wherein the first and second light emitters forms a single body. The first and second light emitters respectively include meta-surfaces that are different from each other, and the different meta-surfaces may be formed on a single material layer. The first light emitter includes a pattern region that transmits a portion of incident light, and the second light emitter does not include the pattern region. A mask may be arranged between the light source and the transparent substrate.
1. A meta illuminator comprising:
a first light emitter configured to emit a patterned light, the first light emitter comprising a first light source; and
a second light emitter configured to emit a non-patterned light, the second light emitter comprising a second light source,
wherein the first and second light emitters are in a line disposed in a lateral direction, and
wherein the first and the second light emitters respectively further comprise a transparent substrate and a meta material layer that are sequentially stacked.
2. The meta illuminator of claim 1 , wherein the first light emitter comprises a pattern region that transmits a portion of incident light, and the second light emitter does not comprise the pattern region.
3. The meta illuminator of claim 1 , further comprising a single layer mask disposed between the first and second light sources and the transparent substrate.
4. The meta illuminator of claim 3 , wherein the single layer mask comprises a pattern region included in the first light emitter and a through-hole included in the second light emitter.
5. The meta illuminator of claim 4 , wherein the pattern region comprises a meta-surface as a region for generating a structured pattern light.
6. The meta illuminator of claim 3 , further comprising an element configured to change a travelling direction of light respectively emitted from the first light source and the second light source.
7. The meta illuminator of claim 6 , wherein the element comprises a mirror or a prism.
8. The meta illuminator of claim 1 , wherein the first light source and the second light source are respectively configured to emit light in a direction perpendicular to the transparent substrate.
9. The meta illuminator of claim 8 , wherein the first and the second light sources comprise vertical cavity surface emitting lasers (VCSELs).
10. The meta illuminator of claim 1 , wherein the first light source and the second light source are respectively configured to emit light in a direction parallel to the transparent substrate.
11. The meta illuminator of claim 10 , wherein the first and the second light sources comprise edge emitting laser diodes.
12. The meta illuminator of claim 10 , further comprising an element configured to change a travelling direction of light respectively emitted from the first light source and the second light source.
13. The meta illuminator of claim 1 , wherein the meta material layer comprises:
a first meta-surface included in the first light emitter; and
a second meta-surface included in the second light emitter,
wherein the first and the second meta-surfaces have light emission characteristics that are different from each other and each of the first and the second meta-surfaces comprises a plurality of nano-posts.
14. The meta illuminator of claim 13 , wherein the first meta-surface is a meta lens provided to emit the patterned light.
15. The meta illuminator of claim 13 , wherein the first meta-surface is a meta diffractive optical element (DOE) provided to emit the patterned light.
16. The meta illuminator of claim 13 , wherein the second metal-surface is a micro-meta lens array provided to emit the non-patterned light having uniform illumination.
17. The meta illuminator of claim 13 , wherein the second meta-surface is a meta diffractive optical element (DOE) provided to emit the non-patterned light having uniform illumination.
18. A meta illuminator comprising:
a first light emitter configured to emit a patterned light; and
a second light emitter configured to emit a non-patterned light,
wherein the first and second light emitters form a single body and the first and second light emitters are in a line disposed in a lateral direction,
wherein the first and the second light emitters respectively comprise meta-surfaces that are different from each other, and formed on a single material layer.
19. A meta illuminator comprising:
a first light source and a second light source;
a transparent substrate comprising:
a upper surface on which a first meta-surface and a second-meta surface are disposed; and
a lower surface on which a patterned mask is disposed and which faces the first light source and the second light source;
wherein the meta illuminator comprises a first region and a second region which are separately provided and disposed side-by-side,
wherein the first light source, the transparent substrate, the first meta-surface, and the patterned mask are disposed in the first region so that a first light emitted from the first light source passes the patterned mask, the transparent substrate, and the first meta-surface, and
wherein the second light source, the transparent substrate, the second meta-surface are disposed in the second region so that a second light emitted from the second light source passes the transparent substrate and the second meta-surface without passing through the patterned mask disposed in the first region.