Glued Lens Group Structure for Dust-Resistant VR Imaging Paths
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Solution Overview
Problem
Dust deposition on the surface of lenses in imaging systems of virtual reality equipment affects the smooth passage of light rays, leading to image loss or reduced brightness.
Innovation Solution
An imaging light path with a glued lens group comprising a first and second lens, where the lenses are glued together without gaps, and a semi-reflective and semi-transmissive film, quarter wave plate, and reflective polarizing film are used to manage light polarization and reflection, preventing dust accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple lenses are designed to be separate with gaps between them, then the imaging system can achieve image amplification, but dust enters via the gaps and deposits on the lens surface, affecting light passage and image quality
Solution Approach 1:
The patent merges multiple separate lenses into a single integrated lens assembly where lenses are closely spaced or contact each other, eliminating the gaps that allow dust entry. This combining approach maintains the optical functionality of multiple lenses while preventing dust contamination by removing the physical separation spaces.
Solution Approach 2:
The patent introduces a waterproof film or coating on the lens surface that acts as a barrier against dust and moisture penetration. This thin film layer prevents external contaminants from reaching the lens surface while maintaining optical transparency, thus protecting the imaging system from dust deposition.
2Object-affected harmful factors
If lenses are placed close together or glued, then dust entry is prevented, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines multiple lenses into a unified assembly with minimal or no gaps between them. By merging the lens elements into a compact integrated structure, the design eliminates dust entry paths while consolidating the optical components into a single manageable unit that reduces overall structural complexity.
Solution Approach 2:
The patent employs composite optical assemblies where lenses are bonded using specialized adhesives or integrated into a unified housing structure. This composite approach allows close spacing of lenses without requiring complex mechanical mounting structures, simplifying the overall assembly while preventing dust ingress.
3Object-affected harmful factors
If a waterproof film is added to prevent dust entry, then light transmission is maintained, but the device complexity increases
Solution Approach 1:
The patent applies a thin waterproof film or hydrophobic coating directly on the lens surface. This film acts as a protective barrier against dust and moisture while maintaining high optical transmission. The film is integrated into the lens manufacturing process rather than added as a separate component, minimizing the increase in device complexity.
Solution Approach 2:
The patent incorporates the waterproof function into the lens material itself through composite construction or surface treatment. By integrating the protective function into the existing lens structure rather than adding separate protective components, the design achieves dust and moisture protection with minimal additional complexity.
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
Ensures smooth light passage, reduces image loss, and maintains image brightness by preventing dust from entering the lens gaps, thereby enhancing imaging quality.
Implementation Method 1
the glued film layer comprises a quarter wave plate and a reflective polarizing film arranged successively along the propagation direction of the imaging light ray
Implementation Method 2
the glued film layer comprises a quarter wave plate and a reflective polarizing film arranged successively along the propagation direction of the imaging light ray
Implementation Method 3
a semi-reflective and semi-transmissive film, a glued film layer is provided between the first lens and the second lens
Data Source
AI summary
An imaging light path includes a display screen and a glued lens group. The display screen emits an imaging light ray. The glued lens group is disposed in the exit direction of the imaging light ray. The glued lens group comprises a first lens and a second lens. The first lens and the second lens are arranged successively along the propagation direction of the imaging light ray. The surface of the first lens facing the display screen is a first surface, and the first surface bulges toward the display screen. The first surface is provided thereon with a semi-reflective and semi-transmissive film. A glued film layer is provided between the first lens and the second lens. The glued film layer comprises a quarter wave plate and a reflective polarizing film arranged successively along the propagation direction of the imaging light ray.