AR Eyeglasses Structured Light Detection via Diffractive Optical Elements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Augmented reality display devices with eye trackers have complex systems and numerous components, which complicates the integration of structured light detecting functions for effective virtual and real-world interaction.
Innovation Solution
The integration of light sources from a structured light system into a laser projector within augmented reality eyeglasses, utilizing diffractive optical elements to form and detect structured beams, simplifies the structure and reduces components while enabling image display and object detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an eye tracker is added to an augmented reality display device, then the position and rotation angle of the eye can be detected, but the system becomes overly complex with too many components
Solution Approach 1:
The patent merges the structured light emitting function and the eye tracking detection function into a single integrated system. The laser projector emits both image beams and invisible structured light beams, while the invisible light camera captures both virtual images and light patterns on the eye. This consolidation eliminates the need for separate eye tracker components, reducing system complexity while maintaining detection precision.
Solution Approach 2:
The laser projector is designed with multi-functionality, serving both as the image display device and the structured light emitter for eye tracking. Similarly, the invisible light camera serves dual purposes as both the virtual image capture device and the light pattern detector. This universal design reduces the total number of components needed in the system.
2Adaptability or versatility
If separate structured light components are added for eye tracking, then detection function is improved, but the number of components increases
Solution Approach 1:
The patent combines the structured light source with the laser projector and the invisible light camera with the virtual image capture system. The laser projector emits both image beams and invisible structured light beams through the same optical path, eliminating the need for separate structured light components and reducing the total number of parts.
Solution Approach 2:
The laser projector is designed to perform both image projection and structured light emission functions. The invisible light camera is designed to capture both virtual images and light patterns on the eye. This multi-functional design achieves detection capabilities without adding separate dedicated components.
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
This approach results in a simpler, more efficient augmented reality eyeglasses design with reduced components that effectively displays images and detects objects, enhancing user interaction by integrating eye tracking functionality without increasing system complexity.
Implementation Method 1
The first diffractive optical element film is configured to diffract the invisible beam into a structured beam
Implementation Method 2
The laser projector is configured to emit at least one invisible beam and an image beam
Implementation Method 3
The invisible light camera is configured to photograph the light pattern on the object to be detected
Implementation Method 4
The second diffractive optical element film is configured to make the image beam travel to the eye
Data Source
AI summary
Augmented reality eyeglasses having a structured light detecting function and including a laser projector, an eyeglass lens, at least one first diffractive optical element (DOE) film, an invisible light camera and a second DOE film are provided. The laser projector is configured to emit at least one invisible beam and an image beam. The at least one first DOE film is disposed on the eyeglass lens. The first DOE film is configured to diffract the invisible beam into a structured beam. The structured beam is transmitted to an object to be detected, so as to form a light pattern on the object to be detected. The invisible light camera is configured to photograph the light pattern on the object to be detected. The second DOE film is disposed on the eyeglass lens, and is configured to make the image beam travel to an eye.