Two-coordinate dynamic photoelectric autocollimator based on single linear CCD

A competitive homemade two-coordinate autocollimator is presented, which is able to measure the angle along the horizontal and vertical axis by using a single linear CCD to detect the three image point positions of the N shape reticle on the CCD, with total measurement error no greater than 5urad in the measurement range of ±2100urad and the dynamic response frequency 2KHz.