| 发明名称 |
Radiation shutters |
| 摘要 |
A rotatable thermal shutter for use with a pyroelectric camera tube is provided with blades having opening and closing edges in the shape of a spiral. The use of a spiral shape allows the rotatable shutter to have a particularly small diameter while still providing satisfactory performance.
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| 申请公布号 |
US4227210(A) |
申请公布日期 |
1980.10.07 |
| 申请号 |
US19780876266 |
申请日期 |
1978.02.09 |
| 申请人 |
ENGLISH ELECTRIC VALVE COMPANY LIMITED |
发明人 |
NIXON, RALPH D. |
| 分类号 |
G03B9/10;G02B5/00;H01J31/49;H04N5/225;H04N5/33;(IPC1-7):H04N5/33;H04N3/14;H01L17/00;G01J1/00 |
主分类号 |
G03B9/10 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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