Nasal-Bridge Camera Placement for Unobstructed Eye Tracking
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Solution Overview
Problem
Existing wearable eye-tracking systems are bulky and obstructive, causing discomfort and measurement errors due to inconvenient camera placements that obscure the user's view and disrupt weight distribution.
Innovation Solution
A wearable eye-tracking system with a camera positioned in the nasal region, unobstructed from the lens, and lightweight components to minimize discomfort and improve accuracy, using infrared technology for precise gaze tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the camera is positioned in traditional locations for eye-tracking, then eye-tracking functionality is achieved, but the device becomes bulky and obstructive to the user's view
Solution Approach 1:
The camera is repositioned from traditional lateral or superior locations to the nasal region, utilizing the nasal bridge area as a new spatial dimension for camera placement. This dimensional shift allows the camera to capture eye movements without obstructing the user's forward view through the lenses.
Solution Approach 2:
The nasal region serves as an intermediary location between the traditional camera positions and the user's eyes. By placing the camera in this intermediate nasal area, the system achieves eye-tracking functionality while maintaining an unobstructed visual path for the user.
2Stability of the object's composition
If heavier components are used to support the camera and electronics, then structural stability is improved, but weight-related discomfort increases
Solution Approach 1:
The nasal bridge area is utilized as a counterbalancing location to offset the weight of the camera and electronic components. By positioning heavier elements near the nose, the design creates a counterweight effect that balances the overall device weight distribution, reducing the torque and discomfort on the user's head and ears.
Solution Approach 2:
The system transitions from distributing weight primarily along the temporal arms to utilizing the nasal dimension for weight distribution. This dimensional shift in weight placement allows for better balance and reduced discomfort by positioning components closer to the center of the face.
3Measurement precision
If the camera is placed closer to the eye for better tracking, then measurement precision is improved, but the lens may obstruct the camera's view
Solution Approach 1:
The camera is positioned in the nasal region, utilizing the lateral-nasal dimension rather than the vertical dimension below the lens. This dimensional repositioning allows the camera to achieve close proximity to the eye for precise tracking while the nasal location naturally avoids obstruction by the lens structure.
Solution Approach 2:
The nasal region provides a localized area with specific geometric properties that are optimal for eye-tracking. This local placement leverages the natural anatomy of the nasal bridge and nose to achieve both close proximity to the eye and unobstructed viewing angles.
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
The system provides clear and unobstructed vision while accurately tracking gaze without obstructing the user's view, reducing weight-related discomfort and enhancing measurement precision.
Implementation Method 1
The camera can include an infrared camera
Implementation Method 2
identify a property of an eye based on the received image
Data Source
AI summary
An optical device can include a first securement arm, a second securement arm, and a lens frame defining a lens aperture and including a nose bridge, the lens frame connected to the first and second securement arms. The optical device can also include an eye-tracking camera mounted to a platform extending from the lens frame, the platform disposed proximate the nose bridge. An electronic component is disposed in the lens frame, the electronic component electronically connected to the camera.