Beam-Splitting Optical Element Vertex Elimination
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Solution Overview
Problem
Conventional optical transmitter modules experience optical power loss and beam-splitting ratio offset due to scattering at the vertex formed by total internal reflection surfaces, leading to alignment difficulties and increased calibration time.
Innovation Solution
A beam-splitting integrated optical element design where the bottom edges of the first and second reflective surfaces are not connected, preventing the formation of a vertex and improving alignment by reducing optical power loss and beam-splitting ratio offset.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If total internal reflection surfaces are connected at the bottom edge to form a vertex, then beam splitting function is achieved, but beam scattering occurs causing optical power loss and beam-splitting ratio offset
Solution Approach 1:
The patent extracts and removes the problematic vertex formation by making the bottom edges of the first and second total internal reflection surfaces non-connected. This eliminates the scattering source while preserving the beam-splitting function through alternative surface configurations.
2Ease of operation
If vertex is formed by connecting total internal reflection surfaces, then beam splitting is achieved, but alignment difficulty increases due to image viewing limitations
Solution Approach 1:
The patent removes the vertex structure that causes alignment difficulties. By making the bottom edges non-connected, the entire light source image can be viewed through the lens, enabling easier passive machine alignment without complex procedures.
3Productivity
If conventional vertex-based beam splitting is used, then beam splitting function is achieved, but yield rate decreases due to optical power loss and alignment issues
Solution Approach 1:
The patent extracts the problematic vertex element that causes both optical power loss and alignment difficulties. The non-connected bottom edge design eliminates these issues, thereby improving manufacturing yield rate.
4Loss of time
If total internal reflection surfaces are connected to form vertex, then beam splitting occurs, but calibration time increases due to alignment difficulties
Solution Approach 1:
The patent removes the vertex structure that complicates alignment and calibration. By making the bottom edges non-connected, the alignment process is simplified, allowing the entire light source image to be viewed and calibrated more quickly.
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 design enhances the yield rate of optical transmitter modules, reduces alignment difficulty, and shortens alignment time by maintaining optical energy and improving beam-splitting ratio uniformity.
Implementation Method 1
Each first reflective surface is adapted to reflect at least a portion of the first beam from the corresponding first lens so that the portion of the first beam is transmitted along a first direction parallel to the second optical axis
Implementation Method 2
Each second reflective surface is located at at least one side of the corresponding second optical axis and located on a transmission path of another portion of the first beam, and inclining directions of the first reflective surface and the second reflective surface are opposite so that the another portion of the first beam transmitted to the second reflective surface is transmitted along a second direction different from the first direction after being reflected by the second reflective surface
Data Source
AI summary
A beam-splitting integrated optical element including a shell, at least one first lens, and at least one second lens is provided. The shell includes a first lens surface, a second lens surface, at least one first reflective surface, and at least one second reflective surface. A bottom edge of each first reflective surface and a bottom edge of each second reflective surface are not connected to each other. The at least one first lens is disposed on the first lens surface. The at least one second lens is disposed on the second lens surface, and each second lens has a second optical axis. Each second reflective surface is located at at least one side of the corresponding second optical axis and located on a transmission path of only a portion of a first beam. An optical transmitter module incorporating said beam-splitting optical element is also provided.