Laser Exposure Device Optical Axis Adjustment Mechanism
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Solution Overview
Problem
Conventional laser exposure devices require lengthy positional adjustments between the laser light-emitting element and lens system, and the wiring of the drive circuit is restricted due to the need for precise alignment and hole formations, leading to increased time and reduced flexibility in the adjustment process.
Innovation Solution
The implementation of a laser exposure device with a light source board and lens board that can move relative to each other using elongated and circular holes for rotation and slide movements, facilitated by eccentric cams, allowing for quicker alignment and fixation of optical axes without the need for precise hole formations near the laser light-emitting element, thus reducing adjustment time and enhancing wiring flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a needle mounted on a precision stage is used to press the laser holder to the lens holder for positional adjustment, then the optical axis alignment between the laser light-emitting element and lens system is improved, but the time required for fixing operation increases significantly
Solution Approach 1:
The patent applies preliminary action by providing a positioning mechanism with a positioning hole in the laser holder and a positioning protrusion on the lens holder that engage before the final screw fixation. This preliminary positioning establishes the correct optical axis alignment relationship between the laser light-emitting element and lens system, allowing the subsequent screw fixation to be performed quickly without requiring time-consuming adjustment operations.
2Ease of operation
If a through hole for receiving the needle is formed in the laser holder at the position in the vicinity of the laser light-emitting element, then the positional adjustment capability is improved, but the wiring flexibility of the drive circuit is restricted
Solution Approach 1:
The patent extracts the needle reception function from the laser holder by providing the positioning hole in the laser holder and the positioning protrusion in the lens holder separately. This separation allows the positioning function to be maintained without requiring a through hole in the laser holder that would interfere with drive circuit wiring. The positioning protrusion on the lens holder can be adjusted independently to accommodate different wiring configurations.
3Manufacturing precision
If the movement range of the laser holder and lens holder is restricted to achieve high accuracy by scrubbing, then the optical axis alignment precision is improved, but the ease of adjustment is worsened
Solution Approach 1:
The patent introduces an intermediary positioning mechanism consisting of a positioning hole in the laser holder and a positioning protrusion on the lens holder. This intermediary mechanism enables precise optical axis alignment without requiring the holders to be scrubbed against each other with restricted movement ranges. The positioning protrusion can be moved freely within the positioning hole to achieve the correct alignment, making the adjustment process easier while maintaining precision.
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
This approach significantly reduces the time required for optical axis adjustment and improves the design flexibility of the drive circuit wiring, allowing for faster and more efficient assembly while eliminating the need for restrictive hole formations near the laser light-emitting element.
Implementation Method 1
The implementation of a laser exposure device with a light source board and lens board that can move relative to each other using elongated and circular holes for rotation and slide movements, facilitated by eccentric cams
Data Source
AI summary
In a laser exposure device according to the present invention, a positioning pin, which is formed in a lens holder supporting a lens system, is inserted through an elongated hole for restriction of a board holder supporting a laser diode. An eccentric cam is inserted into an elongated hole for rotation movement formed in a board holder and a circular hole for rotation movement which is formed in the lens holder and which faces the elongated hole for rotation movement. An eccentric cam is inserted into an elongated hole for slide movement formed in the board holder and a circular hole for slide movement which is formed in the lens holder and which faces the elongated hole for slide movement. The eccentric cams are rotated to relatively move the board holder and lens holder with respect to each other to thereby establish alignment between the optical axes of the laser diode and lens system. In a state where the eccentric cams are fitted into the elongated holes, the board holder and lens holder are fixed to each other by screws.