| 摘要 |
Cooled photosensitive cell ( 80 ) comprising a table ( 50 ), sensors ( 66 ) which are fitted on the table, a screen ( 80 ) to prevent parasitic radiation on the sensors, and at least one Joule-Thomson cooler ( 41, 42 ) to cool the table and the screen. The table ( 50 ) and the screen ( 80 ) are cooled by convection, the table ( 50 ) being provided with apertures ( 55 ) for passage of the cooling flow, which communicate with an annular cavity ( 63 ) for cooling of the screen ( 80 ).
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