Laminated Optical Element for Thermal Deformation Control
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Solution Overview
Problem
Existing optical elements with integrated resin layers between base materials suffer from significant deterioration of optical characteristics due to temperature differences, leading to degraded image quality in display and imaging apparatuses.
Innovation Solution
The optical element is designed with specific thickness and modulus ratios for adhesive layers to minimize deformation of the resin layer, ensuring it accurately follows the base material's surface shape despite temperature changes, thereby maintaining optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a resin layer is integrated between two base materials by adhesive layers, then the shape of the resin layer can be maintained, but the optical characteristics deteriorate due to temperature differences
Solution Approach 1:
The patent changes the physical parameters of the adhesive layers, specifically the ratio of thickness to Young's modulus (T/E), to control the deformation characteristics. By setting 1.1×T1/E1≤T2/E2, the adhesive layers can accommodate thermal expansion differences between base materials while maintaining resin layer flatness, thus preserving optical characteristics under temperature variations
Solution Approach 2:
The patent addresses thermal expansion effects by designing adhesive layers with specific T/E ratios that allow them to compensate for differential thermal expansion between the two base materials. This prevents warping of the resin layer caused by temperature differences, maintaining both shape and optical performance
2Manufacturing precision
If the adhesive layer thickness is reduced to maintain smooth reflective surface, then the bonding strength decreases, but reducing it further causes optical characteristic deterioration due to temperature effects
Solution Approach 1:
The patent optimizes the thickness parameter of adhesive layers to a specific range (5-50 μm) and controls the T/E ratio relationship. This allows the adhesive layers to be thin enough to maintain surface smoothness for high-quality reflection while being thick enough and having appropriate mechanical properties to compensate for thermal effects and maintain optical characteristics
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 solution effectively reduces or prevents deformation of the resin layer with a reflection characteristic, maintaining optimal optical characteristics and image quality under varying temperatures.
Implementation Method 1
T1 being an average thickness of the first adhesive layer, E1 being a Young's modulus of the first adhesive layer, T2 being an average thickness of the second adhesive layer, and E2 being a Young's modulus of the second adhesive layer, 1.1×T1/E1≤T2/E2
Implementation Method 2
a resin layer having a reflection characteristic
Data Source
AI summary
Provided is an optical element that includes a first base material; a first adhesive layer; a resin layer having a reflection characteristic; a second adhesive layer; and a second base material. The first base material, the first adhesive layer, the resin layer, the second adhesive layer, and the second base material are laminated in this order. When an average thickness of the first adhesive layer is T1, a Young's modulus of the first adhesive layer is E1, an average thickness of the second adhesive layer is T2, and a Young's modulus of the second adhesive layer is E2, satisfying 1.1×T1/E1≤T2/E2.