| 摘要 |
An optical intermittent-shunt device includes, in combination, a disc 3 which is driven in rotation R by a motor 4 and is shaped, at least locally, in the form of a plane plate having parallel faces 10, 11 carrying transparent sectors and reflecting sectors 7, 9, the axis of rotation being substantially perpendicular to the faces 10, 11 of the disc 3; a first plane mirror 5 placed in a fixed position on a first side of the rotating disc 3; a second plane mirror 6 placed in a fixed position on the opposite side to the said first side of the rotating disc 3 and parallel to the said first plane mirror 5. <IMAGE>
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