Wavelength Converter Optical Filter Color Rendering
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Solution Overview
Problem
Conventional wavelength converters often fail to provide sufficient color rendering properties when used for illumination, as the wavelength-converted light is not effectively managed to achieve optimal color reproduction.
Innovation Solution
A wavelength converter comprising a base, a wavelength converting component, and an optical filter that transmits or absorbs specific wavelengths of the converted light within the range of 470 nm to 750 nm, improving the color rendering property by controlling the light emitted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a first filter is disposed between the semiconductor laser and the wavelength converting component to reflect wavelength-converted light, then the wavelength-converted light can be directed, but the color rendering property of the emitted light is insufficient
Solution Approach 1:
A second optical filter is introduced as an intermediary component between the wavelength converting component and the first filter. This second filter selectively transmits specific wavelength ranges (e.g., 560-750 nm) while blocking others, working in conjunction with the first filter to achieve both proper light direction and improved color rendering properties
Solution Approach 2:
The patent changes the optical parameters by introducing a filter with specific transmission characteristics that allow certain wavelength bands to pass through while blocking others. The second optical filter is designed with specific transmission wavelengths and bandwidths to modify the spectral composition of the emitted light, thereby improving color rendering
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 enhances the color rendering index of the emitted light, achieving an average color rendering index of 80.2, significantly improving color reproduction compared to conventional methods.
Implementation Method 1
a wavelength converting component that converts a wavelength of at least part of excitation light to emit converted light
Implementation Method 2
the optical filter transmits or absorbs, out of the converted light which includes a wavelength range of from approximately 470 nm to approximately 750 nm, converted light of a predetermined wavelength included in the wavelength range
Data Source
AI summary
A wavelength converter includes a base, a wavelength converting component that converts a wavelength of at least part of excitation light to emit converted light, and an optical filter disposed between the base and the wavelength converting component. The optical filter transmits or absorbs, out of the converted light including a wavelength range of from approximately 470 nm to approximately 750 nm, converted light of a predetermined wavelength included in the wavelength range.