Systems and methods for tiling optically narrowcast signals
Systems and methods for optical narrowcasting are provided for transmitting various types of content. Optical narrowcasting content indicative of the presence of additional information along with identifying information may be transmitted. The additional information (which may include meaningful amounts of advertising information, media, or any other content) may also be transmitted as optical narrowcasting content. Elements of an optical narrowcasting system may include optical transmitters and optical receivers which can be configured to be operative at distances ranging from, e.g., 400 meters to 1200 meters. Moreover, the elements can be implemented on a miniaturized scale in conjunction with small, user devices such as smartphones, thereby also realizing optical ad-hoc networking, as well as interoperability with other types of data networks. Optically narrowcast content can be used to augment a real-world experience, enhance and/or spawn new forms of social-media and media content.
1. A system, comprising:
an optical receiver assembly comprising:
a lenslet array including a plurality of lenslets, each of the plurality of lenslets including a first side and a second side, the first side being convex;
an optical detector array including a plurality of optical detectors, each optical detector of the plurality of optical detectors positioned in a focal plane of the plurality of lenslets, each of the lenslets positioned to concentrate flux collected over the first side of the lenslet array received from a field of view onto at least one optical detector of the plurality of optical detectors, the field of view including at least one tiled optical beam transmitted by an optical transmitter assembly comprising a combination of optical beams having an optical intensity uniformly distributed over a two-dimensional angular output region, wherein one or more edges of two or more optical beams of the combination of optical beams abut each other to create the two-dimensional angular output region;
a signal amplifier and filter coupled to the optical detector array amplifying and filtering signals received from the optical detector array to create an amplified signal;
a format converter converting an optical format of the amplified signal to a digital signal; and
a data processor extracting identification information from the the digital signal, wherein the extracted identification information identifies a source of the optical transmitter assembly.
2. The system of claim 1 , wherein the each of the plurality of optical detectors and a corresponding one of the plurality of lenslets are optically aligned with each other.
3. The system of claim 2 , wherein the plurality of lenslets are positioned such that each of their respective optical axes are parallel to each other.
4. The system of claim 1 , further comprising:
a non-transitory computer-readable medium having instructions stored thereon that, when executed by a processor, causes the system to:
display on a graphical user interface, based on the identification information extracted from the digital signal, a visual representation of the source overlaid over a live display of a field of view of a video camera;
receive data corresponding to user input at the graphical user interface selecting the visual representation of the source; and
in response to receiving the data, display on the graphical user interface, a visual representation of the identification information extracted from the digital signal.
5. The system of claim 1 , further comprising:
an imaging lens; and
an additional optical detector array in a focal plane of the imaging lens, the imaging lens and the additional optical detector array receiving at least one optical beacon from at least one of the optical transmitter assembly and an additional optical transmitter assembly.
6. The system of claim 1 , wherein each optical detector can detect an optical signal in the 10 nm to 10 6 nm spectrum.
7. The system of claim 1 , wherein the receiver is a multi-channel receiver and each optical detector of the plurality of optical detectors is dedicated to receive flux within an optical waveband of a corresponding channel of the multi-channel receiver.
8. The system of claim 1 , further comprising a spectral filter configured to reduce levels of out-of-band flux incident on at least one optical detector of the plurality of optical detectors.