Stereo Camera Sensor Offset Layout for Comfortable 3D Depth
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Solution Overview
Problem
Existing stereo cameras and displays cause discomfort such as dizziness and nausea due to vergence-accommodation conflict (VAC) when displaying 3D images with significant depth discrepancies.
Innovation Solution
A stereo camera design with parallel optical axes and offset photosensitive surfaces of image sensors relative to their optical axes, adjusting the geometric center of the photosensitive surfaces to ensure appropriate depth distribution of captured images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display panel shows two images with disparity to both eyes of the user, then stereoscopic vision is achieved, but vergence-accommodation conflict occurs causing dizziness and nausea
Solution Approach 1:
The patent changes the geometric parameters of the camera system by offsetting the photosensitive surfaces from the optical axes and adjusting their positions. This modifies the depth distribution parameters of captured images, allowing the stereoscopic display to present depth information that matches natural viewing conditions, thereby reducing VAC discomfort while maintaining stereoscopic vision capability
Solution Approach 2:
The patent introduces an additional dimensional adjustment by offsetting photosensitive surfaces not only in the lateral direction but also potentially in the depth dimension relative to the lens plane. This dimensional adjustment enables control over the depth distribution of captured images, providing a new degree of freedom to resolve the VAC conflict
2Manufacturing precision
If the geometric center of the photosensitive surface is offset from the optical axis, then appropriate depth distribution is achieved, but device complexity increases
Solution Approach 1:
The patent applies local quality by selectively offsetting only the photosensitive surfaces from the optical axes while keeping the lens system and other components relatively simple. This localized geometric modification achieves the desired depth distribution precision without requiring complex changes to the entire camera system
Solution Approach 2:
The patent introduces asymmetry by positioning the photosensitive surfaces at offset locations relative to the optical axes rather than at symmetric centers. This asymmetric arrangement enables control over depth distribution in captured images, achieving precise depth encoding through non-standard geometric configuration
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
Enhances user comfort by allowing captured images to be displayed with appropriate depth distribution, reducing VAC-related discomfort.
Implementation Method 1
The first lens has a first nodal point and a first optical axis passing through the first nodal point. The second lens has a second nodal point and a second optical axis passing through the second nodal point.
Implementation Method 2
The first image sensor is disposed corresponding to the first lens and has a first photosensitive surface. The second image sensor is disposed corresponding to the second lens and has a second photosensitive surface.
Data Source
AI summary
A stereo camera includes a first lens, a second lens, a first image sensor and a second image sensor. The first lens has a first nodal point and a first optical axis passing through the first nodal point. The second lens has a second nodal point and a second optical axis passing through the second nodal point. The first lens and the second lens are spaced apart along a lens arrangement direction. The first image sensor disposed corresponding to the first lens has a first photosensitive surface. The second image sensor disposed corresponding to the second lens has a second photosensitive surface. The first optical axis is parallel to the second optical axis. In the lens arrangement direction, a geometric center of the first photosensitive surface is offset from the first optical axis, and a geometric center of the second photosensitive surface is offset from the second optical axis.