Dual-Projector Stereoscopic Device Using Polarizing Beam Splitters
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Solution Overview
Problem
Conventional stereoscopic image devices using a single projector suffer from parallax issues and low luminance due to alternating left-eye and right-eye image projection, as well as inefficient light distribution, which affects the quality of the stereoscopic image.
Innovation Solution
A stereoscopic image device employing two projectors with a configuration of polarizing beam splitters and reflective members that split and combine light beams in a triple-beam mode, ensuring continuous projection of left-eye and right-eye images without electrical modulation, thereby reducing parallax and enhancing luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single projector is used to provide stereoscopic images by alternating left-eye and right-eye image projection, then the device complexity is reduced, but parallax occurs and luminance is low
Solution Approach 1:
The single projector system is segmented into two separate projectors, each dedicated to projecting one eye's image continuously. This segmentation eliminates the alternating projection method, thereby eliminating parallax while each projector utilizes a polarizing beam splitter to divide light into two beams for efficient light distribution and improved luminance.
Solution Approach 2:
Two projectors are merged into a unified stereoscopic imaging system with coordinated polarizing beam splitters and reflective members. The systems are synchronized to project left-eye and right-eye images simultaneously, combining their optical paths to achieve high luminance and eliminate parallax through coordinated operation.
2Reliability
If light is split by polarization state in a single projector system, then stereoscopic image projection is achieved, but optical energy is consumed and luminance is low
Solution Approach 1:
The optical energy from each projector is segmented into two separate beams by polarizing beam splitters, with each beam directed to form one eye's image. This segmentation allows efficient utilization of optical energy by dedicating specific polarization components to specific imaging tasks, reducing overall energy consumption while maintaining reliable stereoscopic projection.
3Device complexity
If alternating left-eye and right-eye image projection is used, then device complexity is reduced, but parallax occurs affecting image quality
Solution Approach 1:
The projection system is segmented into two independent projection channels, each continuously projecting one eye's image without alternation. This segmentation eliminates the temporal displacement between left-eye and right-eye images, thereby eliminating parallax and achieving precise image alignment for high-quality stereoscopic visualization.
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 configuration allows for simultaneous and high-quality projection of left-eye and right-eye images, reducing parallax and increasing luminance, enabling a larger screen coverage with improved image alignment and brightness compared to conventional systems.
Implementation Method 1
a first polarizing beam splitter for reflecting light incident along a first path in a first direction and a second direction and transmitting the light in a third direction based on polarization components of the light
Implementation Method 2
a first reflective member for reflecting the light reflected by the first polarizing beam splitter to a screen
Data Source
AI summary
The present invention relates to a stereoscopic image device and a method for providing a stereoscopic image and, more specifically, to a stereoscopic image device and a method capable of providing a stereoscopic image, which can provide high-quality stereoscopic image by using two projectors and devices related thereto. To this end, the present invention provides the stereoscopic image device and the method for providing the stereoscopic image, the device comprising: a first polarizing beam splitter for reflecting, in first and second directions according to polarizing components, the incident light received along a firth path and transmitting the same in a third direction; a first reflection member for reflecting, in a screen direction, the light reflected from the first polarizing beam splitter; a second polarizing beam splitter for reflecting, in the first and second directions according to the polarizing components, the incident light received along a second path and transmitting the same in the third direction; and a second reflection member for reflecting, in the screen direction, the light reflected from the second polarizing beam splitter.