FAR INFRARED THERMAL IMAGING SYSTEM
Assignee
US Government
Filed as: UNITED STATES OF AMERICA, THE, AS REPRESENTED BY THE SECRETARY OF THE ARMY
Filed
Jan 16, 1987
Granted
Sep 26, 2000
Location
FAIRFAX COUNTY VA US
Abstract
A far-infrared image is directed onto a transducer having a planar array of absorbing discs on one side. The discs are supported by a thin membrane ich expands and bulges as the discs heat up. The discs thus change their spacing with respect to a partially reflective mirror. The nominal spacing between the discs and mirror is about 1/4 wavelength of the infrared radiation, such that absorption is enhanced. The mirror is supported on a transparent substrate through which visible or near-infrared light is shown, and carries a perforated mask atop an insulating layer and in registration with the discs. The mirror/discs thus establish a Fabry-Perot cavity for the visible or near-infrared light, whereby a visible or near-infrared image may be observed or detected as the various discs establish various spacings in accordance with incremental variations in the infrared image. An electrostatic field is established between the mirror and the shield by a voltage source. This field induces an electrostatic field in the discs to pre-bias the discs toward the mirror and thus to tune or adjust the sensitivity of the transducer.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Oct 7, 1987
Rescinded
Feb 2, 2000
Duration
12 years, 4 months
Inventor
- 1VINCENT T. BLY
Record Details
- Patent number
- US 6124593
- Application
- 07023408
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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