Controllable surface filter
First Claim
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1. A tunable surface filter comprising:
- a. at least one element at a surface of said filter; and
b. electronic control to change the effective optical length of said element.
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Abstract
Generally and in one form of the invention this is a periodic surface filter comprising at least one element at a surface of the filter and electronic controls to change the optical characteristics of the element. Other methods and devices are disclosed.
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14 Claims
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1. A tunable surface filter comprising:
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a. at least one element at a surface of said filter; and b. electronic control to change the effective optical length of said element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification