CPC H04B 10/807 (2013.01) [H01S 3/08 (2013.01); H04B 10/69 (2013.01)] | 6 Claims |
1. A receiver for reception of a beam of optical power transmitted by a remote transmitter, the receiver comprising:
at least one photovoltaic cell, each of the output of the at least one photovoltaic cell being coupled to a DC/DC converter;
an optical assembly for retro-reflecting part of the optical power back towards the transmitter, the optical assembly being adapted to ensure that only optical power from the transmitter from directions within a predefined field of view impinge on the optical assembly, the optical assembly comprising:
a focusing element and a back mirror, the back mirror being positioned such that the focusing element focuses optical power onto the back mirror, the focusing element and the back mirror thus comprising a retroreflector,
wherein the focusing element has an essentially flat external surface having a mechanical durability selected to withstand a predetermined level of handling, and
wherein the retro-reflector has an area that is only a minor part of the area of the at least one photovoltaic cell, such that only a minor part of the beam of optical power incident on the receiver is retro-reflected, and diverges towards the transmitter.
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