Optical Element Adjustment Device for Projector Beam Alignment
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Solution Overview
Problem
In projectors, the tolerance of mechanism assembly can cause the angle of a reflected beam to differ from the original design, leading to suboptimal laser speckle positioning, resulting in excessive energy that can burn the fluorescent layer of a color wheel, necessitating precise adjustment of optical elements.
Innovation Solution
An optical element adjustment device comprising a casing base, a bearing element, and a first adjustment module with a screw shank, adjustment element, limiting element, and elastic elements, allowing the optical element to be moved along an extension direction, ensuring accurate alignment and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the optical element position is fixed according to original design, then the device structure is simple, but the beam angle deviates from design value causing laser speckle mispositioning and fluorescent layer burning
Solution Approach 1:
The patent makes the optical element position adjustable through a bearing element with shaft portions that allow movement along extension directions. The first and second adjustment modules enable dynamic adjustment of the optical element's position to precisely control the beam angle, resolving the contradiction between fixed simple structure and precise adjustable structure.
Solution Approach 2:
The patent changes the positional parameters of the optical element by introducing adjustment modules that can modify the distance between the optical element and the light source. By adjusting parameters such as the extension distance of shaft portions and the position of bearing elements, the beam angle can be precisely controlled to match design values.
2Measurement precision
If the optical element is made adjustable to correct beam angle, then the beam alignment precision is improved, but the device structure becomes more complex
Solution Approach 1:
The patent segments the adjustment function into multiple independent modules: bearing elements for positional adjustment, first adjustment modules for controlling extension directions, and second adjustment modules for rotating the optical element. Each module performs a specific adjustment function, making the complex adjustment capability modular and manageable while achieving precise laser speckle positioning.
Solution Approach 2:
The bearing element serves multiple functions: it supports the optical element, allows movement along extension directions through shaft portions, and enables rotation when combined with the second adjustment module. This multi-functionality reduces the need for separate components for each adjustment function, thereby reducing overall device complexity while achieving precise positioning.
3Productivity
If the optical element position is adjusted to optimize beam alignment, then the light efficiency is improved, but the assembly tolerance issues remain
Solution Approach 1:
The patent incorporates adjustment capabilities directly into the device structure during the design phase, allowing for preliminary adjustment of the optical element position to compensate for assembly tolerance variations. This preliminary action ensures that even with manufacturing tolerances, the beam angle can be adjusted to the correct value, maintaining high light efficiency.
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 precise adjustment of optical elements, preventing excessive energy from damaging the fluorescent layer and improving light efficiency by allowing the optical element to move and rotate, thereby optimizing beam alignment and projection quality.
Implementation Method 1
a first elastic element... disposed between the screw shank and the outer frame of the bearing element, such that the screw shank leans closely to the limiting element
Implementation Method 2
The first adjustment element is screwed to the screw shank... the first adjustment element is configured to drive the screw shank to move along the extension direction
Data Source
AI summary
An optical element adjustment device includes a casing base, an optical element, a bearing element, and a first adjustment module. The optical element is movably disposed in the casing base. The bearing element includes an outer frame bearing the optical element and a shaft portion protruding from the outer frame and penetrating from the casing base. The first adjustment module is disposed on the shaft portion. A screw shank is sleeved on the shaft portion and penetrates from the casing base. The first adjustment element is screwed to the screw shank and abuts against the casing base. A limiting element protrudes from a side surface of the shaft portion and is located next to the screw shank. The first elastic element is disposed between the screw shank and the outer frame, such that the screw shank leans closely to the limiting element.