共查询到20条相似文献,搜索用时 0 毫秒
1.
2.
3.
4.
5.
6.
The Science of Nature - 相似文献
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
D. Lemke 《Die Naturwissenschaften》1983,70(11):540-549
Infrared observations with ground-based and balloon-borne telescopes are hampered by thermal background radiation and absorption caused by the earth's atmosphere. A sensitivity gain of up to three orders of magnitude can be obtained under the low photon background conditions of a helium-cooled space telescope. Physical properties of photodetectors and bolometers as well as their application to the new infrared telescopes aboard satellites and Spacelab are discussed. 相似文献
18.
19.
20.