Patent ID: 8605273

Claim:
A method of setting a direction of a solar light tracking sensor when installing the solar light tracking sensor on an optical axis of reflected light collected by a heliostat, comprising the steps of: installing a cylindrical solar light tracking guide on said optical axis to automatically control the posture of the heliostat by the solar light tracking sensor; attaching an optical telescope to the rear end part of the solar light tracking guide so as to be aligned with a guide axis of the solar light tracking guide; adjusting the posture of said solar light tracking guide so that a cross provided in a field of view of the optical telescope agrees with the center of a light collection target position and fixing said solar light tracking guide to an installation base; and removing the optical telescope from the solar light tracking guide and in place of the optical telescope, attaching the solar light tracking sensor to the rear end part of the solar light tracking guide so as to be aligned with the guide axis of the solar light tracking guide.