Virtual Reality Polarization Optics for Compact Wide-Field Imaging
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Solution Overview
Problem
Existing virtual reality apparatuses face challenges in achieving effective linkage interaction between the real and virtual worlds, particularly in optimizing the optical systems to enhance imaging quality, field-of-view, and miniaturization while maintaining high light efficiency.
Innovation Solution
A virtual reality apparatus is designed with a first optical system comprising a sequence of lenses and reflective polarizing elements, and a second optical system with multiple lens elements, configured to project and image real and virtual images, respectively, with specific parameters controlling focal lengths, radii of curvature, and center thicknesses to optimize imaging quality and reduce aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a complex optical system with multiple lenses is used to improve imaging quality and field-of-view, then the imaging performance is improved, but the device size increases
Solution Approach 1:
The optical system is divided into two independent optical systems: a first optical system for virtual image projection and a second optical system for real image capture. Each system can be independently optimized for its specific function, allowing the first system to achieve wide field-of-view and high imaging quality while the second system maintains compact size for real-time capture
Solution Approach 2:
The patent introduces a reflective polarizing element and quarter wave plate in the first optical system to enable polarization-based image processing. This adds a new dimension to the optical path management, allowing the system to achieve enhanced imaging quality and field-of-view without proportionally increasing the physical device size through sophisticated optical element arrangement
2Area of stationary object
If the focal length and lens parameters are optimized to widen field-of-view, then the field-of-view is improved, but optical aberrations increase
Solution Approach 1:
Different lens elements are assigned different refractive powers and optical properties tailored to their specific positions and functions. The first lens has positive refractive power for virtual image projection, while the second lens has negative refractive power for real image capture. This localized optimization of optical properties allows each lens to perform its function with minimal aberrations while contributing to the overall wide field-of-view
Solution Approach 2:
The patent specifies precise parameter relationships between the lenses, including focal lengths, radii of curvature, and thicknesses. By controlling these parameters within specific ranges and maintaining particular ratios between different lens elements, the system achieves wide field-of-view while minimizing optical aberrations through careful parameter optimization
3Measurement precision
If more lens elements are added to improve imaging quality, then the imaging performance is improved, but the manufacturing complexity increases
Solution Approach 1:
The optical system is segmented into two distinct systems with clear functional division. The first optical system uses three lenses with standard positive refractive powers for virtual image projection, while the second optical system uses five lenses with mixed positive and negative refractive powers for real image capture. This segmentation allows each subsystem to be manufactured and assembled independently, reducing overall manufacturing complexity while maintaining high imaging quality
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 apparatus achieves improved imaging quality, wider field-of-view, and miniaturization, enhancing the virtual reality experience by effectively combining optical systems to project virtual and real images with high light efficiency and reduced aberrations.
Implementation Method 1
a first lens having a positive refractive power
Implementation Method 2
a reflective polarizing element
Implementation Method 3
a reflective polarizing element
Implementation Method 4
a quarter wave plate
Implementation Method 5
a first lens element having a negative refractive power; a second lens element having a negative refractive power; a third lens element having a positive refractive power
Data Source
AI summary
The present disclosure discloses a virtual reality apparatus, including a first optical system and a second optical system; the first optical system sequentially includes, along a first optical axis from a first side to a second side, a first lens having a positive refractive power, a reflective polarizing element, a quarter wave plate, a second lens and a third lens having a positive refractive power; the second optical system sequentially includes, along a second optical axis from an object side to an image side: a first lens element having a negative refractive power; a second lens element having a negative refractive power; a third lens element having a positive refractive power; a fourth lens element having a positive refractive power; a fifth lens element; a sixth lens element having a negative refractive power; a seventh lens element having a positive refractive power; and an eighth lens element.