Dual Pulsed Light Generation Using Polarization Beam Splitter
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Solution Overview
Problem
Existing optical apparatuses for generating dual pulsed laser beams are complex and inefficient, requiring multiple optical elements that lead to energy loss and increased heat generation during material processing.
Innovation Solution
A dual pulsed light generation apparatus comprising a polarization beam splitter (PBS) and two polarization reflectors, which divides an incident pulsed beam into two perpendicular polarization pulsed beams, reducing the number of optical components and minimizing energy loss, while allowing for efficient material processing with reduced heat generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple optical elements (splitter, reflective mirror, polarizer, half-wave plate) are used to generate dual pulsed laser beams, then the dual pulsed laser beams can be generated with perpendicular polarization directions, but the device complexity increases and energy loss occurs
Solution Approach 1:
The patent combines the functions of multiple optical elements into a single polarization beam splitter. This single component simultaneously performs beam splitting and polarization separation, eliminating the need for separate splitters, reflective mirrors, polarizers, and half-wave plates. The merging of these functions directly reduces device complexity while maintaining the dual pulsed laser beam generation capability with perpendicular polarization directions.
Solution Approach 2:
The polarization beam splitter is designed as a multi-functional optical element that can handle both beam splitting and polarization control in one component. This universal component replaces multiple specialized optical elements, reducing the overall system complexity while achieving the same functional outcomes of generating dual pulsed laser beams with perpendicular polarizations.
2Adaptability or versatility
If multiple optical elements are used in the optical apparatus, then dual pulsed laser beams can be generated, but energy loss increases and heat generation occurs during material processing
Solution Approach 1:
By merging multiple optical elements into a single polarization beam splitter, the patent reduces the number of interfaces and components through which the laser beam must pass. Each additional optical element typically introduces some energy loss through absorption, reflection, or scattering. Reducing from multiple elements to one minimizes cumulative energy losses and consequently reduces heat generation during material processing applications.
3Productivity
If traditional optical apparatus with many optical elements is used, then dual pulsed laser beams can be generated, but the amount of heat generated during ablation process increases
Solution Approach 1:
The patent reduces heat generation during ablation by minimizing energy loss in the optical path. By using a single polarization beam splitter instead of multiple optical elements, less laser energy is converted to heat within the optical apparatus itself. This allows more energy to be delivered efficiently to the material, improving material removal efficiency while reducing unwanted heat generation that would otherwise require additional cooling or affect processing 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
The apparatus effectively generates dual pulsed laser beams with perpendicular polarization directions, enhancing material removal efficiency and reducing heat generation during processing, and can be used for forming anti-reflection micro/nano structures with improved stain resistance.
Implementation Method 1
The PBS is located in the transmission path of an incident pulsed light and used for dividing an incident pulsed beam into a first polarization pulsed beam reflected by the dividing interface and a second polarization pulsed beam passing through the dividing interface
Implementation Method 2
The first polarization reflector is disposed opposite to the first plane and transforms the first polarization pulsed light into a third polarization pulsed light passing through the dividing interface
Implementation Method 3
The second polarization reflector is disposed opposite to the second plane and transforms the second polarization pulsed light into a fourth polarization pulsed light
Data Source
AI summary
A dual pulsed light generation apparatus including a polarization beam splitter (PBS), a first polarization reflector, and a second polarization reflector is provided. The PBS has a first plane, a second plane, and a dividing interface located between the first plane and the second plane. The PBS is located in the transmission path of an incident pulsed light and used for dividing the incident pulsed light into a first polarization pulsed light reflected by the dividing interface and a second polarization pulsed light passing through the dividing interface. The first polarization reflector is disposed opposite to the first plane and transforms the first polarization pulsed light into a third polarization pulsed light passing through the dividing interface. The first polarization reflector is disposed opposite to the second plane.