Alignment for optical axis of parabolic mirror

A new method to align the optical axis of parabolic mirrors is introduced. The position of the mirror was adjusted to align its optical axis with the slewing axis by utilizing the movement of the image points of two parallel beams (one beam parallel to the slewing axis and another beam oblique to slewing axis with φ angle) reflected by the parabolic mirror, when the parabolic mirror is rotating on the mechanical axis. The theoretical analysis shows that the tilted error of the method is less than 1′and the deviation error is less than 5μm. This method can be used to the detection and optical adjustment of parabolic mirrors.