Reflecting Mirror Holding Structure for Projection Optical Systems
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Solution Overview
Problem
Existing image projecting apparatuses face degradation in image light quality due to assembling errors and inability to accurately adjust the inclination of reflecting mirrors, leading to poor color definition on the projection plane.
Innovation Solution
A holding structure for reflecting mirrors that includes a reflecting mirror bracket, a protrusion on the mirror, a supporting part on the bracket, and a spacer between the supporting part and the bracket, allowing for adjustable inclination and height adjustments of the mirror to improve image projection quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple rotatable bracket is used to hold the reflecting mirror, then the device complexity is reduced and ease of manufacture is improved, but the manufacturing precision and image quality are degraded due to inability to compensate for assembling errors
Solution Approach 1:
The patent applies dynamics by making the mirror holder rotatable around the optical axis, allowing the reflecting mirror to be rotated for adjusting inclination. This dynamic adjustment capability enables compensation for assembling errors without requiring extremely high manufacturing precision, thus resolving the contradiction between ease of manufacture and manufacturing precision.
Solution Approach 2:
The patent changes the inclination parameter of the reflecting mirror by rotating it around the optical axis. This parameter adjustment allows the system to compensate for assembling errors and achieve proper image formation on the projection plane, resolving the contradiction between simple manufacturing and precise alignment.
2Manufacturing precision
If the reflecting mirror inclination is adjusted to compensate for assembling errors, then image quality may be improved, but the device complexity increases due to additional adjustment mechanisms
Solution Approach 1:
The patent introduces a rotatable mirror holder that allows inclination adjustment of the reflecting mirror. This simple dynamic mechanism enables compensation for assembling errors without requiring complex multi-axis adjustment systems, thus improving manufacturing precision while minimizing device complexity.
Solution Approach 2:
The patent segments the adjustment function by providing separate rotatable holders for different mirrors (first reflecting mirror and second reflecting mirror). Each mirror can be independently adjusted around the optical axis, allowing precise compensation for assembling errors without requiring a complex integrated adjustment mechanism.
3Manufacturing precision
If multiple adjusting mechanisms are added to improve image formation accuracy, then manufacturing precision is improved, but the ease of operation and device complexity worsen
Solution Approach 1:
The patent uses rotatable holders that allow simple rotational adjustment of mirrors around the optical axis. This dynamic adjustment mechanism is easier to operate than complex multi-axis positioning systems while achieving the same goal of compensating for assembling errors and improving image formation accuracy.
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 structure enhances the adjustable range of the mirror's inclination and height, enabling accurate image formation on the projection plane even with large assembling errors, thus suppressing image light quality degradation.
Implementation Method 1
a spacer (53) disposed between the secured part (5221) of the protrusion supporting part body (5222) and the upper part holder (472) of the free mirror bracket (47)
Implementation Method 2
causes a reflecting mirror to reflect the generated image light to project the generated image light on a projection plane
Data Source
AI summary
A holding structure holds a reflecting mirror. The holding structure includes a reflecting mirror bracket holding the reflecting mirror; a protrusion disposed on the reflecting mirror; a protrusion supporting part disposed on the reflecting mirror bracket and supporting the protrusion; and a spacer disposed between the protrusion supporting part and the reflecting mirror bracket.