发明名称 |
Chopper for staring infrared systems |
摘要 |
Incident infrared radiation is focussed through a rotatable disk of germanium onto a detector array. The disk has a thickness many times the wavelengths of the incident radiation and is partly covered with a pattern of germanium one-half wavelength of some preselected wavelength of the incident radiation. The pattern is a regular array of mesas, and acts as a phase grating which diffracts incident radiation. The diffracted (or blurred) image on the detector array is used as a reference level for background suppression.
|
申请公布号 |
US4965447(A) |
申请公布日期 |
1990.10.23 |
申请号 |
US19880225410 |
申请日期 |
1988.07.28 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE ARMY |
发明人 |
BLY, VINCENT T.;TERRILL, CONRAD W.;ADVENA, DONNA J. |
分类号 |
G01D5/347;G01D5/38;G01D5/40;H04N5/33 |
主分类号 |
G01D5/347 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|