Integrated TIR Optic for Spectral Filtering and Beam Shaping
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Solution Overview
Problem
Current lighting devices that alter the photometric distribution and spectral power distribution of LED light using secondary filter media suffer from increased optical losses and shifts in photometric patterns, making them unsuitable for applications requiring precise photometric control, such as commercial settings.
Innovation Solution
A lighting device employing a single optic device that filters specific wavelengths of light and controls the beam shape, using materials like engineered resin or acrylic with integrated filtering agents, such as dyes or phosphors, to produce a high-intensity narrow-spectrum light output while minimizing blue light emission, which is achieved through the use of free-form total internal reflection (TIR) optics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If secondary filter media are used to control spectral components, then spectral filtering is achieved, but optical losses increase and photometric pattern shifts occur
Solution Approach 1:
The patent combines the filtering function and beam shaping function into a single integrated optic device. The filtering agent is incorporated directly into the optic material, eliminating the need for separate filter media. This integration allows spectral filtering to be achieved without the additional optical losses and photometric pattern shifts that occur when light passes through separate filter surfaces.
Solution Approach 2:
The optic device uses composite materials where a filtering agent (such as a dye or phosphor) is mixed with an optical material (such as acrylic or resin). This creates a single material that possesses both the optical properties needed for beam shaping and the spectral filtering properties needed to control wavelength content, thereby achieving spectral control without the energy losses associated with separate filter media.
2Object-affected harmful factors
If secondary filter media are used to control spectral components, then spectral filtering is achieved, but photometric pattern control precision deteriorates
Solution Approach 1:
The patent merges the filtering function and beam shaping function into a single integrated optic device. The filtering agent is incorporated directly into the optic material, eliminating the need for separate filter media. This integration allows spectral filtering to be achieved without the additional optical losses and photometric pattern shifts that occur when light passes through separate filter surfaces.
3Illumination intensity
If blue light LED chips with phosphor materials are used, then white light output is achieved, but blue light emission and associated harmful effects increase
Solution Approach 1:
The patent extracts or removes the harmful blue light component from the white light output by incorporating a filtering agent into the optic device that specifically absorbs or blocks blue wavelengths. This allows the beneficial white light output to be maintained while eliminating the harmful blue light emission that causes light pollution and adverse physiological effects.
Solution Approach 2:
The patent converts the harmful blue light emission into a beneficial outcome by using the filtering agent to absorb blue light and potentially re-emit it at less harmful wavelengths, or simply blocking it while maintaining overall illumination. This transforms the harmful blue light problem into a solution that reduces light pollution while preserving useful illumination.
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
This solution provides enhanced photometric control and spectral management, reducing light pollution and improving color quality, while maintaining high luminous flux and reducing adverse effects like spoilage in food products and minimizing blue light emission for better environmental and physiological impact.
Implementation Method 1
The single optic device filters light having a preselected subrange of wavelengths within the first bandwidth
Implementation Method 2
free-form total internal reflection (TIR) optics
Implementation Method 3
a phosphor material 14 that is excited by the blue light 11 emitted from the blue light LED chip. The encapsulated phosphors 14 absorb some of the blue light 11 from the LED and emit green and red light 15
Data Source
AI summary
A lighting device includes a light source emitting light having a first bandwidth. A single optic device is coupled to the light source. The single optic device filters light having a preselected subrange of wavelengths within the first bandwidth to generate a first filtered light. The single optic device controls a shape of a beam of the filtered light. The filtered light creates a high-intensity narrow-spectrum light output. A second light source emits a high-intensity narrow-spectrum light output.


