Eye-Tracking Apparatus 3D Iris Reconstruction
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Solution Overview
Problem
Current iris recognition technologies face challenges in preventing forgery, with hardware methods increasing costs by adding more cameras and software methods being indirect and lacking credibility.
Innovation Solution
A head-mounted display apparatus with an eye-tracking apparatus that uses a wave guide device, voltage control beam splitter, and image capture apparatus to capture images from multiple angles, reconstructing a three-dimensional iris image for enhanced security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If more cameras are added to capture more eyeball information, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent transitions from capturing 2D iris images to reconstructing 3D iris images by introducing temporal dimension through sequential multi-angle imaging. A single camera captures images from different angles at different time points, which are then synthesized into a 3D representation, adding dimensional information without increasing camera quantity.
Solution Approach 2:
The patent introduces a beam splitter as an intermediary optical component that enables a single camera to receive light paths from multiple angles. The beam splitter acts as a mediator that divides and directs incoming light from different directions to the same imaging sensor, allowing multi-angle capture without multiple cameras.
2Device complexity
If a single image capture apparatus is used, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent introduces dynamic elements including a movable mirror or adjustable beam splitter that changes the light path configuration over time. The system dynamically switches between different imaging angles by adjusting optical components, enabling a single camera to capture multi-angle images sequentially, thereby maintaining simplicity while achieving 3D reconstruction capability.
Solution Approach 2:
The system employs periodic action by capturing images in sequential time periods from different angles. The beam splitter or mirror is adjusted periodically to direct different angular views to the camera at different time intervals, allowing the single camera to gather comprehensive spatial information through time-sequential multi-angle imaging.
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 allows for accurate eyeball tracking and security certification by constructing a three-dimensional iris image, reducing the risk of forgery and improving credibility through multiple angle imaging.
Implementation Method 1
The voltage control beam splitter provides a first light path between the image capture apparatus, the voltage control beam splitter, and the target zone
Implementation Method 2
The voltage control beam splitter provides a second light path between the image capture apparatus, the first wave guide device, the first beam splitter, and the target zone
Implementation Method 3
a first wave guide device (110), a voltage control beam splitter (120) disposed at a first end of the first wave guide device (110)
Data Source
AI summary
A head mounted display apparatus and an eye-tracking apparatus thereof are provided. The eye-tracking apparatus includes a first wave guide apparatus, a voltage control beam splitter, a first beam splitter, and an image capture apparatus. The voltage control beam splitter provides a first light path between the image capture apparatus, the voltage control beam splitter, and a target zone according to a control signal during a first time period. The voltage control beam splitter provides a second light path between the image capture apparatus, the first wave guide apparatus, the first beam splitter, and the target zone according to the control signal during a second time period. The image capture apparatus respectively captures a first image and a second image of the target zone through the first light path and the second light path.