Habitat Lighting With Integrated Optical Elements for Caustic Reduction
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Solution Overview
Problem
Standard LED lighting units in habitats create distracting banded caustics and require high energy density, leading to overheating and decreased efficacy.
Innovation Solution
A habitat lighting assembly with a light guide featuring integrated optical elements that diffuse light to eliminate caustics, combined with an air circulation system for heat management and a heat transfer system to maintain efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the number of LEDs is increased to reduce banded caustics, then the quality of light distribution is improved, but the device size and energy consumption increase
Solution Approach 1:
A light diffusing plate is introduced as an intermediary component between the LED array and the aquarium water. This plate diffuses the light from multiple LEDs uniformly, eliminating the banded caustic effect without requiring an excessive number of LEDs or increasing fixture complexity.
Solution Approach 2:
The patent changes the optical parameters of the lighting system by introducing a diffusing medium with specific light scattering properties. This transforms the direct beam light from LEDs into diffused light, improving uniformity while maintaining a manageable number of LED sources.
2Illumination intensity
If high power LEDs are used to provide sufficient light for photosynthesis, then the illumination intensity is improved, but heat generation increases causing overheating
Solution Approach 1:
A heat dissipating plate is introduced as an intermediary thermal management component. This plate conducts heat away from the high-power LED sources and distributes it across a larger surface area, preventing localized overheating while maintaining high light output for photosynthesis.
Solution Approach 2:
The patent changes the thermal parameters of the LED system by introducing active cooling mechanisms and heat-sinking structures. This allows the LEDs to operate at high power levels for sufficient photosynthetic illumination while maintaining safe operating temperatures through improved heat dissipation.
3Stability of the object's composition
If a diffuser is added to eliminate banded caustics, then the light distribution uniformity is improved, but the device size and energy consumption increase
Solution Approach 1:
The light diffusing function is merged with the structural housing or mounting components of the lighting fixture. By integrating the diffusing plate into the existing fixture structure, the patent achieves uniform light distribution without adding separate, bulky diffuser components.
Solution Approach 2:
The diffusing plate serves multiple functions simultaneously: it diffuses light to eliminate caustics, provides structural support for the LED array, and may also serve as a heat dissipation surface. This multi-functionality reduces the need for additional components and simplifies the overall fixture design.
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 effectively eliminates caustics, reduces energy consumption, and prevents overheating, ensuring consistent light distribution and habitat conditions.
Implementation Method 1
when refracted through the moving surface of the water, create bands of light called 'caustics'
Implementation Method 2
a light guide assembly having a plurality of integrated optical elements that diffuse the emitted light in order to eliminate caustics
Implementation Method 3
an air circulation device configured to generate a flow of air into the outer housing through an air intake opening and out of the outer housing through an air discharge opening
Implementation Method 4
a heat transfer system configured to transfer heat generated by the solid-state lighting source to the flow of air generated by the air circulation device
Data Source
AI summary
A lighting assembly includes a light guide having opposite first and second major surfaces and at least one edge surface extending between the first and second major surfaces, a solid-state light source arranged to emit light into the edge surface of the light guide, and a plurality of integrated optical elements associated with the first major surface to redirect the light emitted by the solid-state light source. The lighting assembly may further include an air circulation device and a heat transfer system configured to transfer heat generated by the solid-state lighting source to a flow of air generated by the air circulation device. The solid-state light source may include light-emitting diodes, laser diodes, and/or organic light emitting diodes configured to produce multiple colors. Also provided is a habitat including the lighting assembly, and related methods.