Organic Polymer Optical Member Flatness Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical members for wearable devices require a balance between being lightweight and maintaining high accuracy in transmitting optical information, as organic materials are prone to deformation and damage during processing, making them difficult to achieve high accuracy in optical information transmission.
Innovation Solution
An optical member composed of an organic polymer with specific surface flatness, roughness, and refractive index specifications, produced using a polishing method that restricts movement during processing to minimize deformation, ensuring high flatness and parallelism between surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If organic materials are used for optical members to reduce weight, then weight is reduced, but the optical members become more susceptible to deformation and damage during processing
Solution Approach 1:
The patent changes the physical and chemical parameters of the organic polymer material by specifying a refractive index of 1.58 or more, which indicates the use of high-density organic polymers (such as polyimides or polyethers) that offer better mechanical strength and deformation resistance while maintaining the lightweight advantage compared to traditional inorganic materials
Solution Approach 2:
The patent employs composite material structures by combining organic polymer base materials with specific functional additives and fillers that enhance mechanical strength, surface hardness, and resistance to deformation and damage while maintaining the lightweight characteristic
2Weight of moving object
If organic materials are used for optical members to reduce weight, then weight is reduced, but it becomes difficult to achieve high accuracy in optical information transmission
Solution Approach 1:
The patent specifies precise parameter ranges including flatness of 80 μm or less, arithmetic average roughness Ra of 10 nm or less, and refractive index of 1.58 or more, indicating controlled material properties and surface finish that enable high accuracy in optical information transmission despite using lightweight organic materials
Solution Approach 2:
The patent incorporates preliminary surface treatment steps including polishing with specific abrasive materials (diamond powder with 3-10 μm grain size) and coating applications before final optical assembly, ensuring that the organic polymer surface achieves the required flatness and smoothness in advance to prevent deformation and maintain optical accuracy
3Ease of manufacture
If inorganic materials are used for optical members, then ease of production by polishing is achieved, but weight reduction is limited
Solution Approach 1:
The patent changes the material category from inorganic to organic polymers while adjusting key parameters (refractive index ≥1.58, density, mechanical properties) to achieve a balance between ease of polishing and weight reduction, allowing organic materials to be polished to high precision surfaces
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 optical member achieves lightweight construction while maintaining high accuracy in optical information transmission, with improved resistance to deformation and damage, suitable for use in wearable devices.
Implementation Method 1
a flatness of a region having an area of 1 mm2, as measured by a non-contact type optical flatness meter, is 80 μm or less
Implementation Method 2
an arithmetic average roughness Ra of a region having an area of 4,200 μm2 in the surface A, as measured by a non-contact type optical surface roughness tester, is 10 nm or less
Implementation Method 3
the optical member has a refractive index of 1.58 or more
Data Source
AI summary
The present invention provides an optical member including an organic polymer. This optical member includes a surface A which has an area of 1 mm2 or more, and in which the flatness of a region having an area of 1 mm2, as measured by a non-contact type optical flatness meter, is 80 μm or less.