Polarizer Laser Cutting With Polarization Control for Accuracy
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Solution Overview
Problem
Current cutting methods, such as drill cutting and waterjet cutting, face issues like substrate vibration, low accuracy, and increased production costs due to the need for cooling and subsequent baking processes.
Innovation Solution
A laser cutting method using non-linearly polarized light adjusted to first linearly polarized light by a polarization adjusting device, which is focused on the polarizer, allowing for precise cutting while maintaining or reducing light intensity to prevent damage to adhered objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rotary cutting drill is used to cut the substrate, then the substrate can be cut with substantial thicknesses, but the substrate vibrates during cutting and accuracy is low
Solution Approach 1:
The patent replaces the mechanical rotary cutting drill with a laser beam cutting system. The laser beam eliminates mechanical contact, thereby eliminating substrate vibration while maintaining cutting capability on thick substrates and significantly improving cutting accuracy.
2Ease of manufacture
If waterjet cutting method is used, then cutting can be performed, but water injection for cooling is required and subsequent baking is needed, increasing production costs and manufacturing time
Solution Approach 1:
The patent replaces the waterjet cutting method with laser beam cutting. This eliminates the need for water injection for cooling and subsequent baking processes, thereby reducing production costs and manufacturing time while maintaining cutting feasibility.
Solution Approach 2:
The laser beam induces localized phase transitions (melting and vaporization) of the material at the cutting point, enabling direct cutting without the need for external cooling fluids or post-processing baking, thus improving productivity.
3Productivity
If non-linearly polarized light is focused directly on the adhesive material, then cutting can be performed, but the light beam may not be sufficiently absorbed causing poor focusing and potential damage to adhered object
Solution Approach 1:
The patent changes the polarization state parameter of the laser beam from non-linearly polarized to linearly polarized. This parameter change enables the adhesive material to absorb the laser energy more effectively, ensuring proper focusing and preventing damage to the adhered object while maintaining cutting efficiency.
Solution Approach 2:
The patent utilizes the composite structure consisting of the linearly polarized laser beam and the adhesive material with specific optical properties. The linearly polarized light interacts with the adhesive material's molecular structure to achieve optimal energy absorption, creating an effective cutting system that protects the adhered object.
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 method improves cutting accuracy and reduces production costs by preventing light beam damage to adhered objects during cutting, enhancing the yield of the product.
Implementation Method 1
adjusting the non-linearly polarized light to a first linearly polarized light by a polarization adjusting device
Implementation Method 2
cutting the polarizer by the first linearly polarized light
Implementation Method 3
the adhesive material of the object to be cut substantially absorbs all the first linearly polarized light
Data Source
AI summary
The present disclosure provides a laser cutting method. The laser cutting method is applied to cut a polarizer. The method includes: providing a non-linearly polarized light; adjusting the non-linearly polarized light to a first linearly polarized light by a polarization adjusting device; and cutting the polarizer by the first linearly polarized light.