Folded Optical Apparatus with Movable Lens for Diopter Adjustment
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Solution Overview
Problem
Existing optical apparatuses do not allow for adjustment of the position of the magnified virtual image according to the diopter of the user, limiting their adaptability to different users' visual needs.
Innovation Solution
The optical apparatus includes a lens with a half mirror surface that can be moved along the optical axis and a control device to adjust the position of the magnified virtual image, using a mobile device to change the surface shape or lens power, allowing for diopter-specific image correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a thinned triple-pass optical module is used to magnify the image, then the optical path is folded back to reduce size, but the position of the magnified virtual image cannot be adjusted according to user diopter
Solution Approach 1:
The patent introduces a movable lens that can shift along the optical axis, transforming the static optical system into a dynamic one. This enables the virtual image position to be adjusted for different diopters while maintaining the compact folded optical path structure. The lens movement mechanism allows continuous adjustment without changing the overall module size.
Solution Approach 2:
The patent changes the focal length parameter of the optical system by introducing a movable lens with adjustable position. By varying the lens position along the optical axis, the system can adapt to different diopter requirements, thereby achieving parameter variability within a fixed compact structure.
2Length of stationary object
If the optical path is folded back twice by two reflection surfaces, then the optical apparatus becomes more compact, but the ability to adjust image position for different diopters is lost
Solution Approach 1:
The patent incorporates a movable lens that can dynamically adjust its position along the optical axis, enabling the compact folded optical path to maintain adaptability for different diopters. This dynamic element allows users to adjust the virtual image position without unfolding or expanding the optical path.
3Device complexity
If a fixed optical system is used, then the structure is simpler, but it cannot accommodate different users' visual needs
Solution Approach 1:
The patent adds a movable lens mechanism to the optical system, transforming it from a fixed to a dynamic structure. This relatively simple dynamic addition enables the system to accommodate different users' diopter requirements while maintaining overall structural simplicity.
Solution Approach 2:
The patent enables parameter change by allowing the lens position to vary along the optical axis. This single parameter adjustment (lens position) provides the flexibility needed to adapt to different users' visual needs without fundamentally changing the optical system architecture.
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
Enables the adjustment of the virtual image position to accommodate different users' diopters, improving the apparatus' adaptability and image quality.
Implementation Method 1
a lens (310) having a half mirror surface (311) on a surface
Implementation Method 2
an optical system (300) including a filter (320) and a lens (310)
Implementation Method 3
The optical apparatus includes a lens with a half mirror surface that can be moved along the optical axis
Data Source
AI summary
An optical apparatus includes a display that displays an image, and an optical system that includes a filter (a reflective polarizing plate) and a lens (a half mirror surface) arranged on a downstream side and an upstream side, respectively, on an optical axis L of a display and magnifies the image by at least the lens (half mirror surface). The optical apparatus drives the lens along the optical axis L with respect to the filter by a mobile device, or changes the surface shape or the lens power of the lens having a variable surface shape or variable lens power. Thus, the optical path is folded back twice between the filter and the lens of the optical system, and the image is magnified by the lens (the half mirror surface), so that the position of the magnified virtual image can be adjusted according to the diopter of the user.