Binocular Display Lens Alignment via Height-Adjustable Stirrup
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Solution Overview
Problem
Current methods for aligning images in binocular displays require complex micrometric mechanical adjustments and physical displacement of miniature screens, which are tedious and prone to errors, especially when aiming for large virtual image sizes.
Innovation Solution
A mechanical adjustment method allowing movement of optical imagers within the binocular display frame according to three degrees of freedom, using a height-adjustable stirrup with cylindrical housings and screw-based adjustments, enabling precise alignment of virtual images without physical screen displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If physical displacement of miniature screens is used for alignment, then image superposition can be achieved, but the adjustment process becomes complex and tedious
Solution Approach 1:
Instead of moving the miniature screens to align images, the patent inverts the approach by moving the optical imagers (lenses) relative to the fixed screens. This is achieved through a height-adjustable stirrup mechanism that allows vertical displacement of the lenses, simplifying the adjustment process while achieving the same alignment objective
Solution Approach 2:
The patent introduces a dynamic adjustment mechanism (height-adjustable stirrup with screws) that allows the optical imagers to be positioned at different heights. This dynamic capability enables precise alignment of virtual images without requiring complex fixed mechanical arrangements, transforming a static complex system into a dynamically adjustable simpler system
2Manufacturing precision
If micrometric mechanical adjustments are implemented, then precise image alignment is possible, but the adjustment process becomes time-consuming
Solution Approach 1:
The height-adjustable stirrup with screw mechanisms provides dynamic adjustment capability that is simpler and faster than complex micrometric arrangements. The screw-based height adjustment allows for quick coarse and fine adjustments without the complexity of micrometric mechanisms, reducing adjustment time while maintaining precision
Solution Approach 2:
The patent changes the adjustment parameter from lateral displacement of screens to vertical displacement of optical imagers. This parameter change simplifies the mechanical arrangement needed for adjustment, allowing for faster and easier alignment while achieving the same precision in virtual image superposition
3Manufacturing precision
If complex micrometric mechanical adjustment arrangements are used, then precise alignment can be achieved, but the handling and assembly become difficult
Solution Approach 1:
The patent inverts the adjustment approach by making the optical imagers movable on height-adjustable stirrups rather than making the screens movable. This inversion simplifies the mechanical structure needed for adjustment, making the assembly process easier and more reliable while maintaining the ability to achieve precise alignment
Solution Approach 2:
The patent segments the adjustment function into independent height-adjustable stirrups for each optical imager, rather than requiring a complex integrated micrometric adjustment system. This segmentation allows for simpler manufacturing and assembly, as each stirrup can be adjusted independently without affecting other parts of the system
Data Source
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AI summary
The invention relates to a method of adjusting a binocular display comprising, for each eye of the wearer, an optical imager intended to shape the optical beams corresponding to an image emitted by a beam generating device and to direct them to each eye of the wearer so as to allow the visualization of an informational content contained in a virtual image, this display being associated with a pair of spectacles comprising two lenses supported by a frame. According to the invention the method consists in displacing with respect to said frame (11) at least one said lens (10A, 10B) in accordance with three degrees of freedom, each said imager being contained in said lens (10A, 10B) of said pair of spectacles, so as to obtain a superposition of the two virtual images.