Adaptive Iris Illumination Lens Array for Motion
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Solution Overview
Problem
Existing methods struggle to safely and effectively radiate light into a user's iris using multiple lenses, especially when the user is in motion, such as walking or traveling in a vehicle, due to difficulties in adjusting light distribution and lens positioning.
Innovation Solution
A device with a lens unit and a controller that adjusts the positions and intervals of multiple lenses based on the distance and movement of the iris, using a light source to emit light beams that overlap and focus uniformly across the iris, with the ability to sense and adapt to the user's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light is radiated into the iris using multiple lenses, then light distribution can be improved, but it becomes difficult to protect the user's eye and adapt to movement
Solution Approach 1:
The patent implements dynamic adjustment of lens positions and light emission quantities based on real-time detection of iris position and distance. The controller continuously modifies the configuration of the multiple lenses and light source output to adapt to user movement, transforming a static optical system into a dynamic one that responds to changing conditions.
Solution Approach 2:
The system uses feedback from the detector that measures iris position and distance to automatically adjust lens positions and light emission quantities. This closed-loop control ensures the optical system adapts to movement while maintaining safe and effective light distribution across the iris.
2Ease of manufacture
If the device structure is simplified, then ease of manufacture is improved, but the ability to adjust light distribution and lens positioning is reduced
Solution Approach 1:
The optical system is divided into multiple independent lenses rather than using a single complex lens. Each lens can be independently positioned and controlled, allowing flexible light distribution adjustment. This segmentation enables the system to achieve complex optical functions through simpler, modular components that are easier to manufacture and assemble.
Solution Approach 2:
The multiple lenses serve multiple functions: they can be independently positioned to adjust light distribution, their emission quantities can be individually controlled, and they work together to create focused light patterns on the iris. This multi-functionality allows a single lens array to replace what would otherwise require multiple separate optical systems.
3Illumination intensity
If light beams are focused by decreasing the interval between lenses, then light concentration is improved, but the system becomes more sensitive to distance changes
Solution Approach 1:
The system continuously monitors the distance to the iris using the detector and automatically adjusts the lens positions and intervals in response. When distance changes are detected, the controller modifies the configuration to maintain proper focus and light concentration, eliminating the problem of excessive sensitivity to distance variations.
Solution Approach 2:
The system dynamically changes multiple parameters including lens intervals, lens positions, and light emission quantities based on detected distance. By coordinating adjustments across multiple parameters rather than relying on a single fixed configuration, the system maintains optimal light concentration across varying distances.
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
Enables safe and effective light radiation into the iris, ensuring uniform light distribution and adaptability during user movement, enhancing iris capture for authentication and other services.
Implementation Method 1
a light source configured to radiate light beams into the iris of the user via the arranged lenses by emitting the light beams toward the arranged lenses
Data Source
AI summary
A method and device for radiating light used to capture an iris are provided. The device for radiating light to capture an iris of a user includes a lens unit including a lens array of arranged lenses, a light source configured to radiate light beams into the iris of the user via the arranged lenses by emitting the light beams toward the arranged lenses, and a controller configured to change positions of the arranged lenses based on a distance between the device and the iris, in which the lens array is positioned between the light source and the iris.