Laser Lens Positioning via Flowable Material Fixation
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Solution Overview
Problem
Existing semiconductor laser devices face challenges in precisely positioning the lens relative to the semiconductor laser, leading to assembly-related fluctuations and suboptimal laser beam focusing, particularly in projection applications where high resolution is required.
Innovation Solution
A method where the lens is aligned with its optical axis parallel to the laser beam's direction and then displaced perpendicularly to achieve precise positioning, using a joint connection with flowable material that solidifies to fix the lens in place, allowing for individually coordinated and high-precision alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the lens is fixed to the housing cover with a press fit against a passage opening, then the assembly process is simple, but the positioning precision of the lens relative to the semiconductor laser is poor
Solution Approach 1:
The lens is positionally adjusted to the correct position before being fixed to the lens holder. This preliminary positioning action ensures high positioning precision is achieved before the final fixation step, resolving the contradiction between simple assembly and precise positioning.
Solution Approach 2:
A lens holder is introduced as an intermediary component between the lens and the housing cover. The lens holder provides precise positioning features (such as a passage opening with specific dimensions) that enable accurate lens positioning, while the assembly process remains straightforward through the modular structure.
2Manufacturing precision
If the lens is positionally adjusted and then fixed to a lens holder, then the lens positioning precision is improved, but the device complexity increases
Solution Approach 1:
The lens holder combines multiple functions: it holds the lens, provides positioning features through its passage opening, and connects to the housing cover. By merging these functions into a single component, the structure remains relatively simple while achieving precise lens positioning.
Solution Approach 2:
The lens holder serves multiple purposes: positioning the lens accurately, supporting the lens during assembly, and providing a mounting interface to the housing cover. This multi-functionality reduces the need for additional separate components, keeping the overall device complexity manageable.
3Manufacturing precision
If assembly-related fluctuations in semiconductor laser position occur, then manufacturing tolerance is unavoidable, but laser beam focusing quality deteriorates
Solution Approach 1:
The passage opening in the lens holder is designed with specific dimensional parameters (width and height) that are optimized to accommodate the semiconductor laser's position fluctuations. By carefully selecting these parameters, the system maintains reliable laser beam focusing quality despite manufacturing tolerances in laser positioning.
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 method enables precise adjustment of the lens relative to the semiconductor laser, compensating for assembly fluctuations and optimizing the laser beam's deflection and diameter, suitable for high-resolution applications like RGB projection modules.
Implementation Method 1
flowable material which solidifies for the purpose of the joint connection
Data Source
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AI summary
The invention relates to a method for producing a laser device having a lens which is position-adjusted relative to a semiconductor laser. The lens is first shifted perpendicular to the expansion direction of the laser beam and is consequently penetrated by the laser beam, wherein the optical axis of the lens lies parallel to the expansion direction of the laser beam. The lens is then fastened to a lens holder by a joining connection by means of flowing material, which solidifies in order to form the joining connection, such that the mobility of the lens perpendicular to the expansion direction of the laser beam is blocked.