Directional light transmitter and receiver
First Claim
1. A system for transmitting power wirelessly to a remote device disposed in a space, comprising:
- a transmitting unit comprising a gain medium having a front surface adapted to emit radiation generally towards said space, and a rear surface having a retro-reflector in optical association therewith, the distance between any two opposing points on opposite edges of said front surface of the gain medium being more than the distance between said front and rear surfaces, such that said radiation can be amplified by said gain medium and emitted from said front surface over a wide range of angles; and
a receiver unit associated with said device and adapted to receive said radiation transmitted from said transmitting unit, and comprising a retro-reflector adapted to retro reflect a first portion of said radiation received from said transmitting unit back in the direction of said transmitting unit, such that said transmitting unit amplifies said radiation reflected back from said receiver unit and retransmits it in the direction of said receiver unit, and adapted to transmit a second portion of said radiation, such that it is utilized by said device.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for supplying power wirelessly to a remote mobile device including (i) a transmitting unit for directing radiation into the region of the mobile device, the transmitting unit having a gain medium with a front surface directed towards the space, and a retroreflector on its back surface, and (ii) a receiver unit connected with or attached to the mobile device for receiving radiation transmitted from the transmitting unit. The receiver unit includes (i) a retroreflector for reflecting part of the radiation received from the transmitting unit back in the direction of the transmitting unit, where it is amplified and retransmitted back in the direction of the receiver unit, and (ii) a power detection element for absorbing that part of the radiation not reflected by the retroreflector, and converting it to electrical power for use by the mobile device. Modulation of the transmitted beam enables it to transmit data also.
55 Citations
39 Claims
-
1. A system for transmitting power wirelessly to a remote device disposed in a space, comprising:
-
a transmitting unit comprising a gain medium having a front surface adapted to emit radiation generally towards said space, and a rear surface having a retro-reflector in optical association therewith, the distance between any two opposing points on opposite edges of said front surface of the gain medium being more than the distance between said front and rear surfaces, such that said radiation can be amplified by said gain medium and emitted from said front surface over a wide range of angles; and a receiver unit associated with said device and adapted to receive said radiation transmitted from said transmitting unit, and comprising a retro-reflector adapted to retro reflect a first portion of said radiation received from said transmitting unit back in the direction of said transmitting unit, such that said transmitting unit amplifies said radiation reflected back from said receiver unit and retransmits it in the direction of said receiver unit, and adapted to transmit a second portion of said radiation, such that it is utilized by said device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 36)
-
-
22. A free-space lasing system comprising:
-
a power transmitting unit comprising a first retroreflector; a power receiver unit comprising a second retroreflector, said power receiving unit being remotely located relative to said transmitting unit; a gain medium having a first and a second surface, the distance between any two opposing points on opposite edges of said second surface being more than the distance between said first and second surfaces, said gain medium being disposed between said retroreflectors with its first surface in close proximity to said first retroreflector, such that radiation can be amplified by said gain medium and emitted from said second surface of said laser gain medium over a wide range of angles; and an element for extracting part of the radiation reflected between said retro reflectors and for utilizing said extracted radiation. - View Dependent Claims (23, 24, 25, 26, 27, 28, 37)
-
-
29. A wireless optical power transmitter comprising:
-
a laser gain medium having first and second surfaces, the distance between any two opposing points on opposite edges of said second surface being more than the distance between said first and second surfaces; and a retroreflector in optical association with said first surface of said laser gain medium, wherein said transmitter is adapted to transmit said optical power amplified by said gain medium wirelessly from said second surface over a wide range of angles to a remote receiver unit. - View Dependent Claims (30, 31, 32, 33, 34, 35, 38, 39)
-
Specification