Optical Waveguide Detection Element Integration for Compact XR Glasses
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Solution Overview
Problem
Existing XR glasses, such as AR and VR glasses, have not been miniaturized due to separate video light source and eye tracking modules, complicating optical axis alignment.
Innovation Solution
An optical waveguide detection element integrating a video light source module and an eye tracking module, utilizing a substrate with optical waveguides for visible and near-infrared light, and a photodetector for light reception, with ports for output and reflection, enabling miniaturization and simplified optical axis alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the video light source module and eye tracking module are separate, then each module can be independently designed and manufactured, but the overall device size increases and optical axis alignment becomes significantly complicated
Solution Approach 1:
The patent combines the video light source module and eye tracking module into a single integrated optical waveguide detection element. The visible light waveguide and near-infrared light waveguide are merged into one substrate with shared optical components, eliminating the need for separate module assembly and complex optical axis alignment between independent modules.
2Ease of manufacture
If the video light source module and eye tracking module are separate, then manufacturing flexibility is improved, but the device cannot be miniaturized to fit ordinary eyeglasses
Solution Approach 1:
The patent merges both functional modules into a single compact optical waveguide detection element with integrated waveguides on one substrate, enabling miniaturization that allows the device to fit within ordinary eyeglasses while maintaining manufacturing flexibility through monolithic fabrication processes.
Solution Approach 2:
The patent utilizes planar waveguide structures that propagate light in two dimensions within a thin substrate, allowing complex optical functions to be integrated in a compact form factor suitable for wearable eyeglasses.
3Adaptability or versatility
If separate modules are used, then functional independence is maintained, but optical axis alignment is significantly complicated
Solution Approach 1:
The patent integrates both video and eye tracking functions within a single optical waveguide detection element where the visible light waveguide and near-infrared light waveguide share a common substrate and optical path infrastructure, eliminating alignment errors between separate modules while maintaining distinct functional pathways.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates miniaturization of XR glasses by integrating modules, simplifying optical axis alignment, and enhancing detection sensitivity through single-mode light propagation.
Implementation Method 1
an optical waveguide layer formed on the substrate; the optical waveguide layer includes a first optical waveguide in which visible light having a wavelength of 380 nm to 800 nm propagates, a second optical waveguide in which near-infrared light having a wavelength of 801 nm to 2000 nm propagates
Implementation Method 2
a photodetector, wherein the optical waveguide layer includes a third optical waveguide in which light propagates to a light receiving surface of the photodetector
Data Source
AI summary
A method for manufacturing a video laser module including: a substrate provided with an optical waveguide; and a subcarrier with a laser light source mounted thereon, the method including: while supplying an electric current to the laser light source via an electrode provided in the subcarrier and oscillating a laser from the laser light source, approaching the subcarrier to an input port of the optical waveguide provided in the substrate; detecting a light intensity at an output port of the optical waveguide; adjusting a position of the subcarrier so that the light intensity is maximized; and metal-bonding the subcarrier and the substrate at a position of the subcarrier where the light intensity is maximized.