Multi-focal-plane image generation apparatus, head-up display apparatus, related method, and device
This application provides example multi-focal-plane image generation apparatuses, example head-up display apparatuses, example methods, and example devices. One example apparatus includes a pattern generation device and a focal length adjuster. The pattern generation device is configured to generate a light beam that carries image information, and irradiate the light beam to a surface of the focal length adjuster. The focal length adjuster is configured to perform focal length adjustment on the light beam that is irradiated to the surface of the focal length adjuster to generate a plurality of focal planes of the multi-focal-plane image generation apparatus.
1. An image generation apparatus, wherein the apparatus comprises a pattern generation device and a focal length adjuster, and wherein:
the pattern generation device is configured to:
generate a light beam that carries image information; and
irradiate the light beam to a surface of the focal length adjuster; and
the focal length adjuster is configured to perform focal length adjustment on the light beam that is irradiated to the surface of the focal length adjuster to generate a plurality of focal planes of the image generation apparatus.
2. The image generation apparatus according to claim 1 , wherein the focal length adjuster loads different phase information to generate the plurality of focal planes, wherein the different phase information corresponds to different focal planes.
3. The image generation apparatus according to claim 2 , wherein the phase information that is loaded by the focal length adjuster comprises a phase distribution of a Fresnel lens or a phase distribution of a Zernike lens.
4. The image generation apparatus according to claim 1 , wherein the focal length adjuster comprises a plurality of imaging areas, and different imaging areas correspond to different focal planes.
5. The image generation apparatus according to claim 4 , wherein phase information that is loaded in the different imaging areas is different.
6. The image generation apparatus according to claim 4 , wherein at least one of a quantity, shapes, or focal lengths of the plurality of imaging areas is configurable.
7. The image generation apparatus according to claim 1 , wherein the focal length adjuster is disposed behind an imaging plane of the pattern generation device, or the focal length adjuster is disposed at an imaging plane of the pattern generation device, or the focal length adjuster is disposed in front of an imaging plane of the pattern generation device.
8. The image generation apparatus according to claim 1 , wherein the focal length adjuster is a spatial light modulator.
9. The image generation apparatus according to claim 1 , wherein a polarizer is disposed in front of the focal length adjuster, and the polarizer is configured to align a polarization state of the light beam with a direction of an alignment layer of the focal length adjuster.
10. An image generation method, wherein the method is applied to an image generation apparatus, and the image generation apparatus comprises a pattern generation device and a focal length adjuster, and wherein the method comprises:
generating, by using the pattern generation device, a light beam that carries image information;
irradiating the light beam to a surface of the focal length adjuster; and
performing, by using the focal length adjuster, focal length adjustment on the light beam that is irradiated to the surface of the focal length adjuster to generate a plurality of focal planes of the image generation apparatus.
11. The method according to claim 10 , wherein the performing focal length adjustment on the light beam that is irradiated to the surface of the focal length adjuster to generate a plurality of focal planes of the image generation apparatus comprises:
loading different phase information on the focal length adjuster to allow the image generation apparatus to generate the plurality of focal planes, wherein the different phase information corresponds to different focal planes.
12. The method according to claim 11 , wherein the phase information that is loaded by the focal length adjuster comprises a phase distribution of a Fresnel lens or a phase distribution of a Zernike lens.
13. The method according to claim 10 , wherein the method comprises:
dividing the focal length adjuster into a plurality of imaging areas, wherein different imaging areas correspond to different focal planes.
14. The method according to claim 13 , wherein the method further comprises:
loading different phase information in the different imaging areas.
15. The method according to claim 13 , wherein at least one of a quantity, shapes, or focal lengths of the plurality of imaging areas is configurable.
16. The method according to claim 10 , wherein the focal length adjuster is a spatial light modulator.
17. The method according to claim 10 , wherein a polarization state of the light beam is aligned with a direction of an alignment layer of the focal length adjuster through a polarizer, and the polarizer is disposed in front of the focal length adjuster.
18. A display apparatus, wherein the display apparatus comprises an image generation apparatus and an image component, and wherein:
the image generation apparatus is configured to generate a plurality of images, wherein the image generation apparatus has a plurality of focal planes, and different focal planes correspond to different images in the plurality of images, wherein the image generation apparatus comprises a pattern generation device and a focal length adjuster, and wherein:
the pattern generation device is configured to:
generate a light beam that carries image information; and
irradiate the light beam to a surface of the focal length adjuster; and
the focal length adjuster is configured to perform focal length adjustment on the light beam that is irradiated to the surface of the focal length adjuster to generate the plurality of focal planes of the image generation apparatus; and
the image component is configured to perform imaging for the plurality of images.
19. The display apparatus according to claim 18 , wherein the display apparatus is comprised in a driving device, wherein the driving device further comprises a cockpit and a windshield that is installed in front of the cockpit, wherein the display apparatus is installed in the cockpit, and wherein the windshield performs reflection and imaging on an image that is generated by the display apparatus.
20. The display apparatus according to claim 18 , wherein the focal length adjuster loads different phase information to generate the plurality of focal planes, wherein the different phase information corresponds to different focal planes.