Fine Adjustment Mechanism for Optical Elements Preventing Offset
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Solution Overview
Problem
Conventional fine adjustment mechanisms for optical elements, such as light integration rods, often result in offset issues during adjustment, leading to light energy loss and uneven light beam projection onto digital micromirror devices due to rotational misalignment and axial displacement.
Innovation Solution
A fine adjustment mechanism utilizing a carrying portion with a solid and connecting columns that generate elastic torsion around specific axes, allowing precise adjustment of optical elements without rotational displacement, thereby maintaining the light beam's homogeneity and preventing energy loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If adjusting screws are used to realign the light outgoing end with the condenser lens, then alignment precision is improved, but rotational displacement and axial displacement occur causing offset at the light incident end
Solution Approach 1:
The adjustment mechanism is segmented into independent rotational and axial adjustment components. The carrier structure includes a first adjusting screw for rotational adjustment and a second adjusting screw for axial adjustment, allowing these two adjustment functions to be separated and performed independently, preventing the coupled displacement problem where rotational adjustment caused axial offset.
Solution Approach 2:
A carrier structure acts as an intermediary between the LIR module and the adjustment screws. This carrier includes a first connecting column that provides a rotational pivot point, allowing the LIR module to rotate without causing axial displacement at the light incident end. The carrier mediates the adjustment forces and isolates the light incident end from displacement.
2Stability of the object's composition
If the LIR module is firmly fixed to prevent displacement, then structural stability is improved, but fine adjustment capability is lost
Solution Approach 1:
The system transitions from a static fixed structure to a dynamic adjustable structure. The carrier structure is designed to be stable in its normal state but becomes dynamically adjustable through the adjusting screws. The first connecting column allows controlled rotational movement while maintaining structural integrity, enabling the system to switch between stable and adjustable states as needed.
Solution Approach 2:
The adjustment mechanism changes the positional parameters of the LIR module precisely. The adjusting screws convert rotational motion into precise linear and angular displacements, allowing controlled changes in the position and orientation parameters of the LIR module without compromising overall structural stability.
3Device complexity
If conventional adjustment mechanisms are used, then device complexity is reduced, but light energy loss and unevenness increase due to offset
Solution Approach 1:
The first connecting column acts as a mediator that provides a precise rotational pivot point. This intermediary structure ensures that rotational adjustment occurs around a fixed axis that passes through or near the light incident end, preventing offset and minimizing light energy loss while adding only moderate structural complexity.
Solution Approach 2:
The adjustment mechanism enables precise control of the light beam parameters by changing the position and orientation parameters of the LIR module. This allows optimization of light energy transmission and beam uniformity through controlled parameter adjustments rather than relying on simple but imprecise mechanical connections.
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 mechanism effectively prevents offset during fine adjustments, ensuring accurate light beam alignment and reducing energy loss and unevenness in the projected light beam, enhancing the performance of optical projection devices.
Implementation Method 1
the first connecting portion is capable of generating an elastic torsion around an axis in a first direction
Data Source
AI summary
A fine adjustment mechanism includes a first frame, a carrying portion and a first connecting portion. The first frame has a first opening. The carrying portion is adapted to assemble outside an optical element for fixing it. The carrying portion has a carrying plate disposed in the first opening and extends from the first opening towards a side of the first frame. The first connecting portion is located in the first opening and connected between the carrying plate and the first frame. The first connecting portion is capable of generating an elastic torsion around the axis in a first direction. By using the theorem of elastic torsion, the present invention makes the carrying portion rotate around the axis of the first connecting portion only and is able to avoid the offset problem occurred at the intersection of the axes of the carrying portion and the first connecting portion during adjusting.