| 摘要 |
PURPOSE:To simplify constitution and make operation easy by having Lissajous' curves drawn through such things as multiple disposition of photo scanning elements formed by the DC motors provided with plane mirrors with inclination to the revolving shafts and changing of the number of revolutions of the motors. CONSTITUTION:The revolving shaft 14 of a DC motor 10 is provided with an adapter 18 perpendicular to the shaft 14. Said adapter 18 is constituted by two sets of discs and the upper disc provided with a plane mirror 22 by means of screws, etc. is so adjusted as to have some desired inclination to the stationary lower disc. These form the laser light scanning element composed primarily of the motor 10. If the DC motors 11-13 forming the similar scanning elements are arrayed together with the motor 10 and a laser beam is entered from the 45 deg. direction to the central part of the mirror 22, then Lissajous' curves are drawn by the exit light from the mirror 25 of the motor 13. Hence, depending upon the adjustment, etc. of the number of revolutions of the motors 10-13, their configurations, the angles of inclination of the mirrors 22..., multiple kinds of desired Lissajous' curves may be obtained and the spirogram making device of the simple constitution and easy operation is provided. |
