Night vision compatible area light fixture
First Claim
1. An area light fixture for illuminating an exterior area, the area light fixture comprising:
- an opaque housing having at least one aperture formed therethrough;
at least one light emitting diode received in the housing and positioned to transmit electromagnetic radiation through the aperture of the housing, the light emitting diode having a band gap of at least approximately 2 eV; and
at least one filter positioned with respect to the aperture of the housing to substantially block electromagnetic radiation having a wavelength of approximately 950 nm emitted by the light emitting diode from emanating from the area light fixture to the exterior area.
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Accused Products
Abstract
A night vision equipment compatible area light fixture may include a housing, one or more LEDs such as gallium nitride or indium gallium nitride LEDs, and a filter assembly positioned to filter electromagnetic radiation with a wavelength of 950 nm. The filer may, for example, substantially block electromagnetic radiation with wavelengths between approximately 930 nm and approximately 1000 nm. The filter may additionally, for example, substantially blocking electromagnetic radiation with wavelengths between approximately 900 nm and approximately 1000 nm. The filter may further, for example, substantially block electromagnetic radiation with wavelengths between approximately 700 nm and approximately 1000 nm.
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Citations
24 Claims
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1. An area light fixture for illuminating an exterior area, the area light fixture comprising:
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an opaque housing having at least one aperture formed therethrough;
at least one light emitting diode received in the housing and positioned to transmit electromagnetic radiation through the aperture of the housing, the light emitting diode having a band gap of at least approximately 2 eV; and
at least one filter positioned with respect to the aperture of the housing to substantially block electromagnetic radiation having a wavelength of approximately 950 nm emitted by the light emitting diode from emanating from the area light fixture to the exterior area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A light fixture for providing area lighting for use in night vision environments, the light fixture comprising:
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at least one gallium nitride based semiconductor device operable to emit electromagnetic radiation; and
an optical filter positioned to substantially reduce emission of electromagnetic radiation having wavelengths between approximately 930 nm and at least 1000 nm from the light fixture. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. An area lighting device, comprising:
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a plurality of light emitting diodes, each including at least a gallium arsenide semiconductor material and operable to emit electromagnetic radiation; and
means for filtering electromagnetic radiation emitted by the light emitting diodes having wavelengths between approximately 930 nm and 1000 nm from emanating from the area light device. - View Dependent Claims (22, 23, 24)
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Specification