AR/VR Display Imaging Optics for Full Field Measurement
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Solution Overview
Problem
Existing imaging systems face challenges when measuring displays of near-to-eye devices due to buried entrance pupils, distortion, bulkiness, and custom design requirements, leading to clipped fields of view, difficulty in repositioning, and high time and cost for custom adaptations.
Innovation Solution
The development of imaging systems with a camera and lens arrangement featuring a macro lens, baffle, and eyepiece, where the eyepiece is positioned at the distalmost end, allowing for a coincident exit and entrance pupil, enabling full field of view and modular components for quick adaptation to different devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional imaging systems are used with buried entrance pupils, then the system structure is compact, but the field of view is clipped and measurement accuracy deteriorates
Solution Approach 1:
The lens arrangement is divided into separate functional components: a first lens element, a second lens element, and an aperture stop positioned between them. This segmentation allows the entrance pupil to be formed at a specific location rather than being buried, enabling full field of view while maintaining measurement accuracy for near-to-eye device displays
Solution Approach 2:
An aperture stop is introduced as an intermediary element between the first and second lens elements. This aperture stop defines the entrance pupil location and controls the light cone, serving as a mediator that enables both full field of view and accurate measurement by positioning the entrance pupil at the optimal location
2Measurement precision
If custom imaging systems are designed for each near-to-eye device, then measurement accuracy is improved, but development time and cost increase
Solution Approach 1:
The imaging system is designed with universal components and adjustable parameters that allow it to measure multiple types of near-to-eye device displays without custom adaptation. The modular lens arrangement with adjustable aperture stop position and interchangeable optics enables a single system design to serve multiple measurement applications, reducing development time and cost
3Adaptability or versatility
If the imaging system uses a fixed lens arrangement, then the system structure is simple, but adaptability to different devices is reduced
Solution Approach 1:
The imaging system incorporates dynamic and adjustable elements including an aperture stop that can be repositioned between the first and second lens elements, and a modular optical configuration that can be adjusted for different working distances. This dynamic design enables the system to adapt to various near-to-eye device geometries while maintaining a relatively simple overall structure
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 solution ensures accurate measurement of near-to-eye device displays with minimal repositioning, supports interchangeable components for various parameters, and reduces time and cost by allowing quick adaptation to different devices.
Implementation Method 1
a lens arrangement operably connected to the camera, wherein the lens arrangement includes a macro lens removably connected to an eyepiece, and wherein the macro lens is positioned between the camera and the eyepiece
Data Source
AI summary
Imaging systems, including imaging systems for AR/VR devices, and associated systems, devices, and methods are described herein. In one embodiment, an imaging system includes a lens arrangement operably connected to a camera. The lens arrangement can include a macro lens removably connected to an eyepiece with the macro lens positioned between the eyepiece and the camera. The eyepiece can be positioned at a distalmost end portion of the lens arrangement and/or such that an afocal side of the eyepiece is directed away from the macro lens. The lens arrangement can include a baffle removably connected to the macro lens and/or removably connected to the eyepiece. The macro lens can be electronically and/or automatically focused. A length of the lens arrangement and/or a position of the eyepiece can remain unchanged while the macro lens is focused. In some embodiments, the lens arrangement has a folded configuration and/or includes a minor.