Infrared ray detecting sensor with getter partition
摘要
An infrared ray detecting sensor having an infrared ray detecting element located in the cool chamber of a Dewar structure comprising inner and outer cylindrical members. The chamber is evacuated to vacuum level and a getter is arranged in the chamber for ensuring the vacuum level in the chamber. A partition is arranged in the chamber between the inner end of the inner cylindrical member and the getter for forming a restricted passage and allowing communication of a gas between the getter and the infrared ray detecting element and obstructing a stray ray generated upon a radiation of the getter toward the infrared ray detecting element. The restricted passage is formed such that a ray generated upon radiation of the getter is reflected many times at the restricted passage and is dampened. The partition is roughened and colored in black.
申请公布号
US5317157(A)
申请公布日期
1994.05.31
申请号
US19920979220
申请日期
1992.11.20
申请人
FUJITSU LIMITED
发明人
YOSHIDA, YUKIHIRO;UEDA, SATOSHI;ITOH, MAKOTO;YOSHIKAWA, MITSUO;HAMASHIMA, SHIGEKI;TSUCHIDA, HIROYUKI;HIROTA, KOJI