SUPERCONDUCTING TUNABLE INORGANIC FILTER
Assignee
US Government
Filed as: UNITED STATES OF AMERICA, THE, AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE
Filed
Jul 20, 1989
Granted
Aug 25, 1992
Location
TIPP CITY OH US
Abstract
An optical filter structure for blocking radiation at or shorter than a preselected design wavelength is described which comprises a substantially transparent dielectric host material having dispersed therethrough a multiplicity of grains in preselected size and volume density within the dielectric, the grains comprising a material characterized by a transition between insulating and superconducting states at a characteristic transition temperature. The grains have diametric size substantially smaller then the longest wavelength of light to be absorbed, the filter absorbing resonantly via the dielectric anomaly and being tunable through selection of volume fraction of the grains within the dielectric.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jan 17, 1990
Rescinded
Oct 7, 1991
Duration
1 year, 8 months
Inventor
- 1ROBERT J. SPRY
Technology Domains
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Record Details
- Patent number
- US 5142418
- Application
- 07386797
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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