FACEBOOK TECHNOLOGIES, LLC (Menlo Park, CA)
Abstract for Traces between phase array antenna and radio frequency integrated circuit in the mm-wave system
The disclosed systems and methods to reduce distortion in an image displayed on a near-eye display. The invention covers a display system comprising an assembly for light that generates the light needed to display images and a distortion-correcting optical assembly. Mirror scanning systems are designed to take the light that has been distorted, then reflect it, and then scan it to produce images on an image plane. The distortion-correcting optics unit delivers the pre-distorted and collimated light into the mirror scanning system, which is configured to deform the light and send an image that is undistorted to a display.
Background for Traces between phase array antenna and radio frequency integrated circuit in the mm-wave system
The disclosure described herein generally refers to optical projection systems, in particular one that has the capability of displaying a scan.
Headsets used in artificial real-time (AR) applications usually display content using the use of a display. For many applications, it is recommended to have a lightweight headset with a slim shape. It is difficult to design a display for this type of headset. The projection system produces image light. However, the combination of space constraints (e.g. extremely small) and a wide field of view (e.g., wide to provide an immersive AR experience) and an external stop-location tend to limit optical designs for projectors and have limited conventional headset design. Design issues can also occur when trying to create projection systems that have a smaller size, like optical and differential distortion.
Summary for Traces between phase array antenna and radio frequency integrated circuit in the mm-wave system
The display described herein is a system that comprises: (i) a light assembly that is configured to produce source light to create a display image; (ii) an optical distortion correction optics assembly that comprises: (a) an anamorphic field lens configured to apply a first distortion to the source light as well as (b) an optical device that includes at least one aspheric anamorphic surface that is configured to apply an additional distortion to the light source from the anamorphic field lens, the second distortion comprising collimation; and(iii) an optical system for scanning configured to divert the light source having the first distortion and second distortion to the distortion correcting optics assembly with the first distortion and the second distortion at least partially compensate for optical distortion due to the scanning system. In certain examples, the light assembly comprises one or more light sources. In some embodiments, one or more light sources create the display pixels. In some embodiments, one or more display pixels are images. In certain embodiments, the source light having the first distortion as well as the second distortion is a collimated and pre-distorted source light.
An anamorphic lens can be configured to adjust the orientation of the source lighting or expand the source lamp or collimate the source. The anamorphic lens can be configured to apply an axisymmetric adjustment to the source light in specific embodiments. In some instances, the optics assembly comprises a monolithic prism. In some instances, the optics assembly includes an open prism with one or more light transmission surfaces and one or more light reflection surfaces. The freeform prism may be configured to distort or collimate the light source in specific embodiments. In certain embodiments, one or more light transmission surface includes a freeform surface. In certain embodiments, one or more light transmission surface comprises a Zernike surface or an aspheric anamorphic surface, or a flat surface. an un-rotationally symmetrical surface, or a non-axisymmetric surface. Certain embodiments contain the following: a Zernike or Anamorphic Aspheric, a flat, non-rotationally symmetric, or non-axisymmetric reflective surface. In some embodiments, the scanning system includes a mirror scanning device. In some instances, the mirror scanning system is designed to undistort the pre-distorted and collimated source light outputted by the distortion-correcting optics assembly.
In some embodiments, the distortion-correcting optics assembly as well as the scanning system are configured to send undistorted light to an image plane. The image plane could comprise at least one of the following options: a coupler or a waveguide or image plane, a coupler or waveguide, a display near-eye display, and a user. In some embodiments, an undisturbed image light is an image light devoid of at least a barrel distortion, a pincushion distortion, a mustache distortion, a keystone distortion, or the differential distortion. In certain embodiments, at a minimum, the distortion of the barrel the pincushion distortion the mustache distortion, the keystone distortion or the differential distortion is pixel misalignment on an image plane. In certain embodiments, the distortion-correcting optics assembly ensures an image plane that is aligned with the pixel plane.
This summary does not identify the key features or essential aspects of the claimed subject material. It is also not intended to be used as a sole source to determine the claim’s scope. The subject matter should be understood by reference to appropriate sections of the full specification of this disclosure, including any or all drawings, and every claim. The foregoing, together with other features and examples, will be described in more detail below in the following specification, claims, and accompanying drawings.
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