| 摘要 |
PURPOSE:To eliminate the need to adjust mechanically a deflection controller part even if axial distortion occurring to a projection pattern is corrected, and to easily carry a device by correcting the axial distortion on the projection pattern surface by an electric means. CONSTITUTION:A signal which deflects a laser beam in an X-aixal direction is inputted from an input terminal IX to the inverted input terminal I12 of an operational amplifier 10 which constitutes a horizontal deflecting amplifier A1, amplified, and outputted as an X-axial deflecting signal output from an output terminal OX. At the same time, a signal which performs Y-axial deflection is inputted to the inverted input terminal I22 of an operational amplifier 20 constituting a vertical deflecting amplifier A2 from an input terminal IY, amplified, and outputted from an output terminal OY as a Y-axial deflecting signal output, thereby deflecting the laser beam in the X-aixal and Y-axial directions. The output of the amplifier A2 is voltage-divided by resistances R13 and R14 and supplied to the uninverted input terminal I11 of the operational amplifier 10 constituting the horizontal deflecting amplifier A1 and supplied to the inverted input terminal I12 of the operational amplifier.
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