COMPENSATING OPTICAL DEVICE, OPTICAL SPACE COMMUNICATION DEVICE USING IT, LASER RANGE FINDER, AND LASER FINISHING MACHINE

摘要

PROBLEM TO BE SOLVED: To simplify a device while using a curvature mirror. ;SOLUTION: The curvature mirror 3 capable of changing the curvature distribution of a mirror face is provided in a light path, its outgoing light is converged by a lens 5, and its light intensity is detected by a light detector 6. The modulation intensity signal 14 and modulation signal 9 for each drive region of the curvature mirror 3 are obtained by a synchronous detection section 7 based on the obtained light intensity signal 13, and the control quantity of the curvature mirror 3 is determined by a controller 8 based on the modulation intensity signal 14. The control signal 17 from the controller 8 and the modulation signal 9 from the synchronous detection section 7 are added by an adder 10, and the curvature of the curvature mirror 3 is changed by a drive section 12 based on the added value so that the wave front of the outgoing light of the curvature mirror 3 becomes flat.;COPYRIGHT: (C)1998,JPO