MULTIPLE MODE WIRELESS DATA LINK DESIGN FOR ROBUST ENERGY EFFICIENT OPERATION
First Claim
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1. A module adapted to provide an optical wireless indoor data link, said module comprising:
- a first light source adapted to transmit a beam of light;
a first concave lens; and
a first adjustable Variable Focus Lens, wherein the variable focal lens is configured to adjust the transmit beam size to produce an optimal zero propagation loss coupling condition at a receiver end for a specific link distance.
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Abstract
The invention provides power smart in-door optical wireless link that provides lossless beam propagation between Transmitter (T) and Receiver (R) for changing link distances including in conditions of transmit and receive beam spoiling due to environmental effects. Each T/R unit uses a combination of fixed and variable focal length optics (called inverse adaptive optics) to smartly adjust the transmit beam laser beam propagation parameters of minimum beam waist size and its location to produce the optimal zero propagation loss coupling condition at the Receiver for the specific link distance.
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Citations
25 Claims
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1. A module adapted to provide an optical wireless indoor data link, said module comprising:
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a first light source adapted to transmit a beam of light; a first concave lens; and a first adjustable Variable Focus Lens, wherein the variable focal lens is configured to adjust the transmit beam size to produce an optimal zero propagation loss coupling condition at a receiver end for a specific link distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A module comprising:
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a first light source adapted to transmit a beam of light; a first concave lens; and a first adjustable Variable Focus Lens, wherein the variable focal lens is configured to adjust the transmit beam size to produce an optimal zero propagation loss coupling condition at a receiver end for a specific link distance.
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25. A module adapted to provide an optical wireless indoor data link, said module comprising:
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a first light source adapted to transmit a beam of light; a first concave lens; and a second concave Lens, wherein at least one lens is configured to move relative to the other lens and adjust the transmit beam size to produce an optimal zero propagation loss coupling condition at a receiver end for a specific link distance.
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Specification