Dynamic Color Matching Filter Tilt for Optical Measurement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical multilayer film filters used in color distribution measurement systems exhibit strong angle dependency, making them unsuitable for use with various imaging optical systems, as changes in the angle of incidence or aperture diaphragm affect spectral transmission characteristics, leading to inaccurate measurements.
Innovation Solution
A color distribution measuring optical system that includes a changing device to adjust the angle of the color matching function filter relative to the imaging optical system's optical axis, allowing for consistent spectral transmission characteristics across different imaging systems by regulating the tilt angle based on the image side numerical aperture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an optical multilayer film filter is used for color distribution measurement, then manufacturing precision and cost are improved, but measurement accuracy deteriorates due to strong angle dependency of spectral transmission characteristics
Solution Approach 1:
The patent makes the filter angle dynamic by providing a rotating mechanism that allows the optical multilayer film filter to be rotated around the optical axis. This enables the system to adapt to different incident light angles from various imaging optical systems, maintaining accurate color distribution measurements while preserving the manufacturing advantages of optical multilayer film filters
2Adaptability or versatility
If the imaging optical system is changed or aperture diaphragm is regulated, then adaptability to different measurement objectives is improved, but measurement accuracy deteriorates due to changes in spectral transmission characteristics
Solution Approach 1:
The rotating mechanism enables the filter angle to be dynamically adjusted according to the specific imaging optical system being used. By matching the filter angle to the incident light angle, the system maintains consistent spectral transmission characteristics across different measurement configurations, resolving the contradiction between adaptability and measurement precision
Solution Approach 2:
The patent changes the angular parameter of the filter relative to the optical axis by providing a rotating mechanism. This parameter adjustment compensates for variations in incident light angles caused by different imaging optical systems or aperture settings, maintaining accurate color distribution measurements across diverse operating conditions
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
Enables accurate color distribution measurement across various imaging optical systems by maintaining consistent spectral transmission characteristics, ensuring reliable results regardless of changes in the imaging system or aperture settings.
Implementation Method 1
The optical multilayer film filter is obtained by staking a plurality of dielectric multilayer films having different properties
Implementation Method 2
the spectral transmission characteristic of the optical multilayer film filter has the strong angle dependency as compared with the spectral transmission characteristic of the colored glass
Data Source
AI summary
A color distribution measuring optical system generates an image of an object to be measured via an imaging optical system and a color matching function filter. The color matching function filter is an optical multilayer film filter, and the angle of arrangement of the color matching function filter can be changed, with respect to an optical axis of the imaging optical system, depending on the numerical aperture of the imaging optical system by a tilt angle changing device. Various imaging optical systems can be used even when the optical multilayer filter is used.