Research/Patents/US 5161068
US 5161068Tier 3 — General Defense

SUPERCONDUCTING SEARCHING 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

Nov 3, 1992

Location

TIPP CITY OH US

Abstract

An optical reflection band filter structure for selectively blocking radiation within a preselected range of wavelengths is described which comprises a plurality of multipole elements of preselected configuration deposited with prescribed spacing in a periodic array on a substrate of dielectric material, each multipole configuration comprising a central element having shape corresponding to the overall shape of the multipole and a plurality of adjacent connected segments, all comprising a material characterized by transition from superconducting phase to insulating phase, upon being heated to a characteristic transition temperature, the central element having predetermined thickness and each transition segment disposed outwardly from the center element having higher transition temperature than the next inwardly disposed transition segment, and the central element.

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Rescinded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

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records