| 摘要 |
<p>A retractable device (20), of a light shield type, is mounted on an optical instrument (10), such as a space telescope. The device comprises rods (22, 24) articulated about the optical instrument (10), within planes containing its axis (12), and a flexible and opaque covering (26), carried by these rods (22, 24). Motor units such as torsion springs integrated into the articulation devices (28, 30) of the rods allow the device (20) to be changed from a retracted configuration into an active configuration.</p> |
