发明名称 |
Surveillance apparatus. |
摘要 |
<p>An infra-red long range target discriminator (10) comprises a rotatable optical chopper (18) having alternate opaque and transmissive elements of equal size, and generally of the same size as the point spread function of a distant target which is a virtual point source. The discriminator (10) comprises a plurality of photodetectors (28) each of which corresponds in size to a neighbouring pair of the transmissive and opaque elements.</p> |
申请公布号 |
EP0316489(A1) |
申请公布日期 |
1989.05.24 |
申请号 |
EP19870310124 |
申请日期 |
1987.11.17 |
申请人 |
BRITISH AEROSPACE PUBLIC LIMITED COMPANY |
发明人 |
BURGESS, OSWALD BRITISH AEROSPACE PLC. |
分类号 |
G01S3/781;G01S3/784;G01S3/789 |
主分类号 |
G01S3/781 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|