Patent ID: 7796351
Filing Date: 2010-09-14
Classification: F16C,G01C

Abstract:
1. An optical axis tilting device for a laser optical system comprising: a lens barrel in which a laser optical system is disposed; a tilt frame with a Z axis coincident with an optical axis of the laser optical system and an X axis and a Y axis being orthogonal to each other in a plane orthogonal to the Z axis, and being tilted in at least one of an X-axis direction and a Y-axis direction and provided with a tilt sensor detecting a horizontal reference position; a tilt mechanism tilting the tilt frame relative to the lens barrel and comprising a drive motor, a threaded shaft rotated by the drive motor, a movable member reciprocated by the shaft and engaging with the tilt frame to tilt the tilt frame relative to the lens barrel, and a position detector detecting a position of the movable member relative to the lens barrel; a leveling mechanism supporting the lens barrel tiltably, and tilting the lens barrel to level the tilt frame so that the tilt sensor detects the horizontal reference position; a ball joint mechanism allowing the tilt frame to be supported by the lens barrel and comprising a computing portion computing a tilt angle of the tilt frame relative to the lens barrel according to the position of the movable member detected by the position detector.