Avionic display with tunable filter
AssigneeRockwell Collins, Inc.
InventorsDonald E. Mosier, Ricky J. Johnson
Life of this patent
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Abstract
The display includes a light source and a filter positioned to receive light from the light source. The filter has a different wavelength characteristic depending upon an angle of incidence of light thereon. The angle of incidence is adjustable. The display can be utilized in an avionic display system with night vision equipment. The wavelength characteristic can be a cutoff wavelength characteristic.
Claims20
A display including a light source, the display comprising:
- a filter positioned to receive light from the light source, wherein the filter has a different wavelength characteristic depending upon an angle of incidence of the light from the light source, whereby the angle of incidence of the light is adjustable.
An avionic display system comprising:
- an optical shutter;
- a light guide;
- a first light source;
- and
- a night vision filter positioned to receive light from the first light source, wherein the filter has a different wavelength characteristic depending upon an angle of incidence of the light from the first light source, whereby the angle of incidence of the light is adjustable, whereby the light travels through the filter to the light guide to the optical shutter.
A method of calibrating a filter for use in a display system, the display system including a light source and the filter, the angle of incidence of light on the filter being adjustable, wherein the filter has a cutoff characteristic varying according to the angle of incidence of light from the light source, the method comprising:
- measuring at least a portion of the spectrum of light provided through the filter;
- and
- adjusting the angle of incidence of the light on the filter until a desired cutoff characteristic is achieved.
Dependencies are inferred from the claim text.