Method and apparatus for measuring the direction of the object

(57) Abstract: The present invention relates to a method for measuring the direction of the object (10) which emits or reflects a light beam. Optical elements constituting the optical wave of a light beam (14) converts the resolution photoelectric detector (13) normal point-like image (20) the intensity distribution having a plurality of peaks on (14 '). From the structural function of the intensity distribution (14 ') and the optical element (14), it can be measured in the direction of the object (10) with high accuracy over a wide measurement range. Moreover, thus, the number is not less design of the optical path is shorter and the optical element is obtained.