Augmented reality display device and pair of augmented reality glasses
An augmented reality display device and a pair of augmented reality glasses are provided. The augmented reality display device includes a substrate, an imaging element and a first optical element. The substrate includes a first side and a second side opposite to each other. The imaging element is configured to display a primary virtual image formed by virtual image light. The first optical element is configured to receive the virtual image light, orient the virtual image light to magnify the primary virtual image into a secondary virtual image, and make the virtual image light exit from the first optical element in a direction from the second side to the first side.
1. An augmented reality display device, comprising: a substrate, an imaging element and a first optical element, wherein,
the substrate comprises a first side and a second side opposite to each other;
the imaging element is configured to display a primary virtual image formed by virtual image light;
the first optical element is located on the first side or the second side of the substrate, and configured to receive the virtual image light, orient the virtual image light to magnify the primary virtual image into a secondary virtual image, and make the virtual image light exit from the first optical element in a direction from the second side to the first side;
the augmented reality display device further comprises a second optical element, the second optical element is on the second side of the substrate, the imaging element and the first optical element are located on a same side of the second optical element, and the second optical element is configured to correct ambient light transmitted through the first optical element in a direction from the second side to the first side;
the augmented reality display device further comprises a third optical element on the second side of the substrate, the imaging element and the first optical element are on the first side of the substrate, the imaging element is closer to the substrate than the first optical element, and the third optical element is closer to the substrate than the second optical element; and
the first optical element is a convex lens or a converging metalens, the second optical element is a concave lens or a diverging metalens, and the third optical element comprises a reflective surface facing the imaging element.
2. The augmented reality display device according to claim 1 , wherein the first optical element is located on the first side of the substrate, and the imaging element is located on the second side of the substrate, and is closer to the substrate than the second optical element; and
wherein the first optical element is a convex lens or a converging metalens, and the second optical element is a concave lens or a diverging metalens.
3. The augmented reality display device according to claim 1 , wherein the imaging element is located on the first side of the substrate, the first optical element is located on the second side of the substrate, and is closer to the substrate than the second optical element; and
wherein the first optical element comprises a concave transflective lens comprising a concave reflective surface that faces the imaging element, or a diverging metalens comprising a reflective surface that faces the imaging element, and the second optical element comprises a convex lens or a converging metalens.
4. The augmented reality display device according to claim 1 , wherein gaps are between a plurality of imaging elements, and each of the gaps is configured to allow ambient light to pass through.
5. The augmented reality display device according to claim 1 , wherein an optical axis of each of a plurality of first optical elements passes through a geometric center of the primary virtual image formed by a corresponding one of a plurality of imaging elements.
6. The augmented reality display device according to claim 1 , wherein the substrate is a curved substrate, a plurality of first optical elements are spaced apart from each other on the curved substrate, and the curved substrate is configured to adjust light-exiting angles of a plurality of first optical elements to converge a plurality of secondary virtual images.
7. The augmented reality display device according to claim 1 , wherein the substrate is a curved substrate, a plurality of first optical elements are connected to form a first optical layer, and the first optical layer comprises a free-form-surface lens.
8. The augmented reality display device according to claim 1 , wherein the substrate is a planar substrate, a plurality of first optical elements are spaced apart from each other on the planar substrate, the augmented reality display device further comprises a volume holographic grating, and the volume holographic grating is located on a side of the first optical element away from the substrate.
9. The augmented reality display device according to claim 8 , wherein the volume holographic grating comprises a plurality of sub-gratings, an optical axis of each of the plurality of sub-gratings coincides with an optical axis of a corresponding one of the plurality of first optical elements, and the volume holographic grating is configured to converge a plurality of secondary virtual images.
10. The augmented reality display device according to claim 1 , wherein the substrate is a planar substrate, a plurality of first optical elements are connected to form a first optical layer, and the first optical layer comprises a holographic lens.
11. The augmented reality display device according to claim 1 , wherein the imaging element is a pixel island, the pixel island comprises a plurality of pixels, and the pixel islands are arranged at intervals on the substrate.
12. The augmented reality display device according to claim 11 , wherein each of the pixel islands comprises a plurality of pixels of different colors.
13. The augmented reality display device according to claim 12 , wherein a plurality of secondary virtual images respectively emitted by the plurality of pixel islands are spliced into a complete virtual image.
14. The augmented reality display device according to claim 11 , wherein the pixel island comprises a plurality of pixels of a same color.
15. The augmented reality display device according to claim 14 , wherein secondary virtual images formed by the adjacent pixel islands with different pixel colors at least partially overlap.
16. The augmented reality display device according to claim 15 , wherein secondary virtual images of a same color emitted by the pixel islands of a same color are spliced to each other, and secondary virtual images of different colors emitted by the pixel islands of different colors are superposed to form a complete virtual image.
17. A pair of augmented reality glasses, comprising the augmented reality display device according to claim 1 .
18. An augmented reality display device, comprising: a substrate, an imaging element and a first optical element, wherein,
the substrate comprises a first side and a second side opposite to each other;
the imaging element is configured to display a primary virtual image formed by virtual image light;
the first optical element is configured to receive the virtual image light, orient the virtual image light to magnify the primary virtual image into a secondary virtual image, and make the virtual image light exit from the first optical element in a direction from the second side to the first side;
the augmented reality display device further comprises a second optical element, the second optical element is on the second side of the substrate, the imaging element and the first optical element are located on a same side of the second optical element, and the second optical element is configured to correct ambient light transmitted through the first optical element in a direction from the second side to the first side;
the augmented reality display device further comprises a third optical element, wherein the third optical element is on the first side of the substrate, the imaging element and the first optical element are on the second side of the substrate, the imaging element is closer to the substrate than the first optical element, and the first optical element is closer to the substrate than the second optical element; and
the first optical element comprises a concave transflective lens comprising a concave reflective surface, or a diverging metalens comprising a reflective surface, the second optical element comprises a convex lens or a converging metalens, and the third optical element comprises a reflective surface facing the imaging element.
19. The augmented reality display device according to claim 18 , wherein the first optical element is located on the first side of the substrate, and the imaging element is located on the second side of the substrate, and is closer to the substrate than the second optical element; and
wherein the first optical element is a convex lens or a converging metalens, and the second optical element is a concave lens or a diverging metalens.
20. The augmented reality display device according to claim 18 , wherein the imaging element is located on the first side of the substrate, the first optical element is located on the second side of the substrate, and is closer to the substrate than the second optical element; and
wherein the first optical element comprises a concave transflective lens comprising a concave reflective surface that faces the imaging element, or a diverging metalens comprising a reflective surface that faces the imaging element, and the second optical element comprises a convex lens or a converging metalens.