Head-Mounted Imaging Device with Movable Camera and Optical Filter
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Solution Overview
Problem
In recent head-mounted devices, it is challenging to capture a user's face at a suitable angle of view without increasing the device's size, as securing a sufficient distance between the subject and the camera reduces the angle of view, or vice versa.
Innovation Solution
An imaging device with a support structure mountable on a user's head, featuring an optical filter that reflects predetermined light and allows visible light to pass, and a first imaging unit that acquires images based on this reflected light, enabling a wider angle of view while maintaining a compact device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between the subject and the camera is increased to capture an image at a suitable angle of view, then the image quality is improved, but the device size increases
Solution Approach 1:
The patent introduces a movable camera unit that can change its position relative to the support structure along the optical axis. This adds a dimensional degree of freedom (movement along the optical axis) to the imaging system, allowing the camera to achieve suitable imaging distances without increasing the overall device volume. The camera unit moves toward or away from the subject along the optical axis to adjust the angle of view and image quality while maintaining a compact device structure.
Solution Approach 2:
The camera unit is designed to be movable rather than fixed, allowing dynamic adjustment of the camera's position along the optical axis. This dynamic capability enables the system to adapt the imaging distance and angle of view according to different imaging requirements, achieving suitable image quality without requiring a larger device structure. The movable design allows the camera to be positioned optimally for each imaging scenario.
2Volume of moving object
If the distance between the subject and the camera is decreased to reduce device size, then the device becomes more compact, but the angle of view is reduced
Solution Approach 1:
The camera unit's movable design along the optical axis enables dynamic adjustment of the imaging distance. When imaging conditions require a wider angle of view, the camera can be positioned closer to the subject; when higher image quality is needed, the camera can be moved farther away. This dynamic positioning capability allows the compact device to adapt its angle of view and imaging quality according to different scenarios.
Solution Approach 2:
By introducing movement along the optical axis as an additional degree of freedom, the system can achieve variable angle of view and imaging quality without increasing device volume. The camera's position along the optical axis is adjusted to optimize the balance between device compactness and imaging performance for different applications.
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 solution allows for capturing a user's face at a suitable angle of view while restraining the increase in device size, facilitating smoother communication in virtual reality systems by providing detailed images of the user's face, including eyes and mouth, to other users.
Implementation Method 1
an optical filter having a reflection surface that reflects predetermined light having a predetermined wavelength band and allows visible light to pass
Data Source
AI summary
There is provided an imaging device, the imaging device including: a support structure configured to be mountable on a head of a user; an optical filter having a reflection surface that reflects predetermined light having a predetermined wavelength band and allows visible light to pass; and at least one first imaging unit configured to acquire a first image including at least a part of a face of the user on the basis of the predetermined light reflected by the reflection surface.