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US 7,804,587 B2Granted
System for the recognition of an optical signal and materials for use in such a system
AssigneeEvident Technologies
InventorsLuis A. Sanchez, James Hayes, Clinton T. Ballinger, Eva Sbardella
Life of this patent
Estimating the term…
Abstract
A system and method for distinguishing a first light source from other light sources utilizes an image receiver that can selectively engage and disengage a filter. The filter can be configured to either block bands of light corresponding to the light being emitted by either the first source or the other sources. By sequentially engaging and disengaging the filter from the image receiver, the first light source may be distinguished from other light sources.
Claims22
A system comprising:
- a first light source configured to emit light at a first set of wavelength bands;
- a transmitting filter to block transmission of a first subset of the first set of wavelength bands;
- a receiving filter configured to block transmission of a second subset of the first set of wavelength bands, wherein the first and second subsets are not identical;
- and an image receiver configured to discriminate between the first light source and other light sources by engaging the receiving filter.
1 more element
A system comprising:
- a first light source configured to emit light in the infrared spectrum;
- a transmitting filter to block transmission of a set of wavelength bands with in the infrared spectrum;
- and
- an image receiver configured to identify the set of wavelength bands.
1 more element
A system comprising:
- a first light source;
- a transmitting filter to block transmission of wavelength bands within the infrared spectrum;
- and
- an image receiver configured to detect wavelength bands in the infrared spectrum, the image receiver configured to distinguish between a second light source emitting light in the infrared spectrum and the first light source.
1 more element
Dependencies are inferred from the claim text.