Patent ID: 6175451
Filing Date: 2001-01-16
Classification: G02B,H04B

Abstract:
An optical axis correcting apparatus for correcting the optical axis of a light beam from a communicating party in an optical space transmission system that transmits and receives the light beam to/from said communicating party, comprising:optical axis changing means for changing the angle of a reflecting mirror placed in an optical path of the light beam, to change the optical axis of the light beam to be reflected by said reflecting mirror;optical axis direction detecting means for detecting the direction of the optical axis of the light beam that is changed by said optical axis changing means;optical axis adjusting means for adjusting the angle of said reflecting mirror based on the direction of the optical axis of the light beam detected by said optical axis direction detecting means with said optical axis changing means, to adjust the direction of the optical axis of the light beam toward said communicating party; andcorrection means for detecting a rotary angular velocity of the reflecting mirror owing to an oscillation applied to said reflecting mirror, and for correcting the angle of said reflecting mirror based on the detected rotary angular velocity.