Spectrally selective grow tube
First Claim
1. A grow tube, comprising:
- an interior member that is at least partially transparent to electromagnetic radiation in the visible portion of the electromagnetic spectrum and substantially opaque to electromagnetic radiation in the ultraviolet portion of the electromagnetic spectrum, said interior member having a greater transmittance in at least one of a blue and a red band pass than in a green band pass;
an exterior member substantially surrounding said interior member; and
an intermediate member disposed between said interior and exterior members, said intermediate member being opaque and having a reflectance that reflects electromagnetic radiation incident on said intermediate member in said red and blue band passes.
1 Assignment
0 Petitions
Accused Products
Abstract
A spectrally selective grow tube or tree shelter that improves the establishment of woody plant forms by reduction and/or elimination of certain biotic and abiotic stress factors. The grow tube may provide an enhanced micro climate that is humid and rich in CO2 and promotes photosynthesis by selectively propagating photosynthetically active radiation. In addition to providing a physical barrier to wind and herbivores, certain embodiments of the grow tube can also provide protection from chemical sprays while permitting ventilation of the grow tube. Various embodiments of the spectrally selective grow tube may comprise separate interior and exterior members for enhancement of the interior and exterior surface functions and that may be co-extruded. The interior member may be dyed or pigmented to selectively transmit wavelengths of the visible spectrum known to promote photosynthesis, such as red light and/or blue light. The exterior member may include a semi-reflective coating such as TiO2 or ZnS that reflects at least a portion of the visible light spectrum while enabling transmission of infrared wavelengths therethrough for radiative cooling.
23 Citations
15 Claims
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1. A grow tube, comprising:
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an interior member that is at least partially transparent to electromagnetic radiation in the visible portion of the electromagnetic spectrum and substantially opaque to electromagnetic radiation in the ultraviolet portion of the electromagnetic spectrum, said interior member having a greater transmittance in at least one of a blue and a red band pass than in a green band pass; an exterior member substantially surrounding said interior member; and an intermediate member disposed between said interior and exterior members, said intermediate member being opaque and having a reflectance that reflects electromagnetic radiation incident on said intermediate member in said red and blue band passes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification