Optical Lens Set and Image Combiner for Multi-Focal Correction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical systems for mixed reality devices struggle to provide effective multi-focal vision correction, as they impact the field of the virtual image and require personalized placement to accommodate different facial profiles and preferences.
Innovation Solution
The optical system comprises an optical lens set with a first and second optical lens, and an image combiner disposed between them. The first optical lens provides far field correction, while the second optical lens provides near field correction, allowing for multi-focal vision correction without affecting the virtual image field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single optical lens is used for vision correction, then the device complexity is reduced, but it cannot provide effective multi-focal correction for both near and far fields simultaneously
Solution Approach 1:
The single optical lens is divided into two separate lenses: a first optical lens for far field correction and a second optical lens for near field correction. This segmentation allows each lens to be optimized for its specific focal range, enabling multi-focal vision correction without requiring a single complex lens design.
Solution Approach 2:
The patent introduces a spatial dimension by placing the two optical lenses at different positions along the optical path. The first optical lens is positioned closer to the light source while the second optical lens is positioned closer to the eye, creating a multi-plane correction system that addresses different focal distances simultaneously.
2Reliability
If optical correction is applied to the entire field of view, then vision correction is comprehensive, but the virtual image field is impacted and distorted
Solution Approach 1:
The patent applies different optical corrections to different regions of the field of view. The first optical lens provides far field correction for the peripheral and upper regions, while the second optical lens provides near field correction for the central and lower regions. This local differentiation ensures that the virtual image field remains unimpacted while providing comprehensive vision correction.
Solution Approach 2:
The image combiner acts as an intermediary element that separates the optical correction paths. It allows the first and second optical lenses to operate independently on different portions of the light path, enabling comprehensive field correction without distorting the virtual image field that passes through the combiner.
3Measurement precision
If personalized optical placement is required to accommodate different facial profiles, then vision correction precision is improved, but the ease of operation is reduced
Solution Approach 1:
The patent designs the optical system with universal applicability by using two separate optical lenses with standardized mounting mechanisms. The first and second optical lenses can be independently adjusted to accommodate different facial profiles and prescriptions, allowing a single device design to serve multiple users with different optical needs without requiring personalized customization.
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 solution enables clear perception of both virtual images and real-world imagery across different distances, eliminating blurriness and allowing for comfortable use of augmented reality devices without the need for personalized placement.
Implementation Method 1
The first optical lens provides far field correction
Implementation Method 2
The second optical lens provides near field correction
Implementation Method 3
an image combiner that combines light from the light projector with light from the real world
Data Source
AI summary
Techniques for an optical lens set and optical combiner are described herein. In an example, an apparatus has a first side and a second side. The apparatus includes an optical combiner and a first optical lens disposed at the first side. The image combiner is configured to output light emitted by a light projector as a virtual image projection within a field of view. At least a first portion of the first optical lens is within the field of view and is characterized by a first optical power that provides a first optical correction. The first optical power compensates for a second optical power of a second optical lens optionally disposable at the second side.