Optical Property Testing Device Using Non-Polarized Light
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Solution Overview
Problem
Conventional methods for testing optical properties of quarter-wave films are costly due to expensive device manufacturing and maintenance, and they struggle to efficiently identify the phase retardation axis, especially after commercialization of polarizing plates with quarter-wave films.
Innovation Solution
A device comprising a light source, a lower polarizer, a first quarter-wave film, a second quarter-wave film, and an upper polarizer, which uses non-polarized light to test optical properties by detecting colors corresponding to plane directional phase differences, allowing for efficient identification of phase retardation axes with reduced costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a polarized light source generating device and detector are used to test optical properties, then measurement precision is improved, but device cost and maintenance cost increase
Solution Approach 1:
The patent replaces expensive polarized light source generating devices with inexpensive non-polarized light sources (such as white LEDs or halogen lamps). The system uses affordable polarizing films and quarter-wave films as disposable or low-cost components to achieve the necessary polarization functions, dramatically reducing device manufacturing and maintenance costs while maintaining measurement capability
Solution Approach 2:
The patent substitutes complex mechanical polarization generation systems with a simpler optical system based on non-polarized light sources combined with polarizing films and quarter-wave films. This replacement eliminates the need for expensive polarized light source generating devices while achieving the same optical testing functionality through material properties rather than complex mechanical systems
2Device complexity
If conventional testing methods are used, then device complexity is reduced, but identification efficiency of phase retardation axis deteriorates
Solution Approach 1:
The patent introduces a color detection mechanism that observes color changes in transmitted light when the quarter-wave film is rotated. The phase retardation axis is identified by detecting specific color patterns (such as maximum brightness or specific hue angles) at different rotation positions. This visual/color-based detection method significantly improves identification efficiency without adding complex mechanical or electronic systems
Solution Approach 2:
The system allows the quarter-wave film itself to indicate its phase retardation axis through inherent optical properties. By observing the color or brightness changes of transmitted light as the film rotates, the film effectively 'self-identifies' its orientation without requiring external complex measurement equipment. The material's own optical characteristics are utilized for detection
3Ease of manufacture
If a polarizing plate with quarter-wave film is commercialized, then manufacturing cost is reduced, but ability to distinguish absorption axis and phase retardation axis angle deteriorates
Solution Approach 1:
The patent introduces a second quarter-wave film as an intermediary component between the polarizing plate and the detector. This additional quarter-wave film, combined with the color detection mechanism, creates a testing configuration that can distinguish the angle between the absorption axis and phase retardation axis. The intermediary component enables precise angular measurement without increasing the cost of the commercialized polarizing plate itself
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 enables cost-effective testing of optical properties and improved identification efficiency of phase retardation axes, capable of testing a wide range of plane directional phase differences, thus addressing the limitations of conventional methods.
Implementation Method 1
a light source, a lower polarizer, a first quarter-wave film, a second quarter-wave film, an upper polarizer
Implementation Method 2
A quarter-wave film has a function to convert linearly polarized light into circularly polarized light
Implementation Method 3
detecting the light to transmit the upper polarizer at the color detecting part
Data Source
AI summary
The present application relates to a device for testing optical properties and a method for testing optical properties using the same. The device of the present application has inexpensive manufacturing and maintenance costs, is capable of testing a wide range of plane directional phase differences, and provides the method for testing optical properties with improved identification efficiency of the phase retardation axis.