Unlock instant, AI-driven research and patent intelligence for your innovation.

Customized polymer/glass diffractive waveguide stacks for augmented reality/mixed reality applications

A technique of diffracting waves and polymers, applied in the direction of diffraction grating, optical waveguide, optical waveguide, coupling of optical waveguide, etc.

Pending Publication Date: 2022-02-08
MAGIC LEAP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This particular relationship of waveguide material to incident wavelength can impose challenges related to optical applicability if the refractive index and corresponding yellowness index values ​​are above a certain threshold

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Customized polymer/glass diffractive waveguide stacks for augmented reality/mixed reality applications
  • Customized polymer/glass diffractive waveguide stacks for augmented reality/mixed reality applications
  • Customized polymer/glass diffractive waveguide stacks for augmented reality/mixed reality applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The present invention relates to the use of optical tuning materials for various color layers (eg RGB) in augmented reality (AR) / mixed reality (MR) diffractive waveguide based eyepieces to optimize the overall optical performance of the eyepiece. The materials used for each color waveguide can be tuned for optimal optical properties (refractive index, yellowness index, transmission) depending on the operating wavelength. Various embodiments of glass and polymer based waveguides configured to achieve optimal optical properties are described.

[0024] Differences in the refractive index (dispersion curve) for a given waveguide material at RGB wavelengths typically result in a different field of view (FOV) for each layer and can limit the overall FOV of the waveguide stack. Additionally, materials with a higher refractive index (eg, glass and polymers) tend to exhibit a larger yellowness index (b*), which is related to the light transmission of the waveguide and the overal...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A diffractive waveguide stack includes first, second, and third diffractive waveguides for guiding light in first, second, and third visible wavelength ranges, respectively. The first diffractive waveguide includes a first material having first refractive index at a selected wavelength and a first target refractive index at a midpoint of the first visible wavelength range. The second diffractive waveguide includes a second material having a second refractive index at the selected wavelength and a second target refractive index at a midpoint of the second visible wavelength range. The third diffractive waveguide includes a third material having a third refractive index at the selected wavelength and a third target refractive index at a midpoint of the third visible wavelength range. A difference between any two of the first target refractive index, the second target refractive index, and the third target refractive index is less than 0.005 at the selected wavelength.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Patent Application No. 62 / 865,808, filed June 24, 2019, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a custom polymer / glass diffractive waveguide stack with improved performance for augmented reality / mixed reality applications. Background technique [0004] Augmented / mixed reality devices typically use a single type of glass or polymer material for all layers (eg, red (R), green (g), and blue (B) layers). The overall performance of the device can be determined by the performance of the RGB layers. Some key performance indicators such as the modulation transfer function (MTF), efficiency, field of view (FOV), contrast, and uniformity of the eyepiece depend on the optical properties of the individual layers. These optical properties include refractive index, yellowness index, haze, light transmission, sur...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G02B6/122G02B6/10G02B6/293G02B27/42G02B5/18
CPCG02B27/0172G02B2027/0112G02B2027/0174G02B27/0081G02B6/0076G02B6/34G02B6/0038G02B6/0065
Inventor S·D·巴加特B·G·希尔C·佩罗兹张杰李灵
Owner MAGIC LEAP