Dichroic Rainbow Wheel for Saturated Color Control
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Solution Overview
Problem
Existing color changing systems for high intensity lighting, such as stage lighting, are limited in producing saturated colors and often result in undesirable interim colors during transitions, particularly when using CYM color filters and multiple wheels.
Innovation Solution
A dichroic coated color altering device with a rainbow wheel and a saturation-inducing wheel, where the wheels are fabricated using photolithographic techniques to create sections of pure saturated colors and blended regions for smooth transitions, and a super-magenta wheel is used to expand the color range and saturation capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If CYM color filters and multiple wheels are used, then a range of colors can be produced, but saturation is limited and undesirable interim colors appear during transitions
Solution Approach 1:
The patent employs a rainbow wheel with continuously variable color coatings instead of discrete CYM filters. The wheel features a full spectrum of colors arranged radially, allowing smooth transitions between hues without producing undesirable interim colors. This directly addresses the limitation of traditional CYM systems by enabling continuous color variation while maintaining saturation.
Solution Approach 2:
The color generation system is divided into multiple independent rotating wheels, each with specific color characteristics. The rainbow wheel provides continuous hue variation, while additional wheels (such as saturation wheels or effect wheels) can be layered to enhance specific color properties. This segmentation allows independent optimization of each wheel's function to achieve both color range and saturation.
2Adaptability or versatility
If traditional CYM color filter systems are used, then basic color changes are possible, but smooth color transitions are difficult to achieve
Solution Approach 1:
The rainbow wheel is designed with colors arranged in a continuous spectral sequence around its circumference. As the wheel rotates, the color changes smoothly from one hue to the next without abrupt transitions or unwanted intermediate colors. This continuous color arrangement enables elegant and smooth color transitions that are difficult to achieve with discrete filter systems.
3Adaptability or versatility
If multiple color wheels are used to expand color range, then more colors can be produced, but the system complexity increases
Solution Approach 1:
Multiple color wheels are combined in a single lighting instrument housing, with each wheel serving a specific function. The rainbow wheel provides continuous hue variation, while additional wheels can provide saturation enhancement or special effects. This merging of multiple functional wheels into one integrated system expands the color range and capabilities without requiring separate instruments for each function.
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 system enables the production of a wide range of colors, including complex hues like magentas and purples, with improved saturation and smooth color transitions, using fewer control knobs compared to traditional CYM systems, enhancing color accuracy and control.
Implementation Method 1
A dichroic coated color altering device with a rainbow wheel and a saturation-inducing wheel
Data Source
AI summary
A rainbow wheel that colors light that is passed therethrough. The wheel can be formed using a photolithographic process. Another supermagenta wheel can be used to increase the number of colors that can be obtained.