PURPOSE: To maintain rotation balance and prevent a mirror surface from varying, and to converge a laser beam on one point by forming a laser beam chopper of a single mirror and a counter balance fitted to one end of the mirror.
CONSTITUTION: The laser beam chopper 10 consists of a support plate 13,the single mirror 15 whose one end is fixed thereto, and the counter balance 16 provided symmetrically with the mirror 15. When a driving motor 11 is driven, the mirror 15 also rotates to chop the laser beam 2, whose reflected beam is converged on one point on a 2nd machining stage 4. This results from that the mirror 15 is single, the balance is held by the balance 16, and the surface of the mirror 15 does not vary. The quantity of the beam 2 sent to 1st and 2nd machining stages 3 and 4 can be varied by varying the width of the mirror 15. Consequently, the reflected light of the laser beam can be converged on one point.
| JPS60192911 | LIGHT CONTROLLER |
| JP3515162 | OBSERVING DEVICE |
SHIRATORI SUSUMU
TSUKAMOTO KOICHI
OKUTOMI MAMORU
| JP55152511B | ||||
| JPS593225A | 1984-01-09 | |||
| JPS48100148A | 1973-12-18 |