It often needs transfer a reference from one place to another place in aerospace and guided missile launching. At first,
principles of several typical optical azimuth transmission methods are presented. Several typical methods are introduced,
such as Theodolite (including gyro-theodolite) collimation method, Camera series method, Optical apparatus for azimuth
method and polarization modulated light transmission method. For these typical azimuth transmission methods, their
essential theories are elaborated. Then the devices, the application fields and limitations of these typical methods’ are
presented. Theodolite (including gyro-theodolite) collimation method is used in the ground assembly of spacecraft.
Camera series method and optical apparatus for azimuth method are used in azimuth transmission between different
decks of ship. Polarization modulated light transmission method is used in azimuth transmission of rocket and guided
missile. At the last, the further developments of these methods are discussed.
In order to validate the detection precision of a three Dimensions Optical Deformation Measure System (3D-OMS), a
calibration method of auxiliary coordinate and the optical coordinate base on theodolites has been proposed. The
installation method by using theodolites to calibrate the auxiliary coordinate and the optical coordinate has been
proposed. Specifically, after the auxiliary mirrors installed, the installation accuracy is detected, then we analyzed the
influence of Axis-Error of theodolite under the practical condition of our experiment. Furthermore, the influence of
validation precision for the 3D-OMS caused by the misalignment of auxiliary coordinate and optical coordinate is
analyzed. According to our theoretical analysis and experiments results, the validation precision of the 3D-OMS can
achieve an accuracy of 1″ at the conditions of the coordinate alignment accuracy is no more than 10′ and the measuring
range of 3D-OMS within ±3′. Therefore, the proposed method can meet our high accuracy requirement while not
sensitive to the installation error of auxiliary mirrors. This method is also available for other similar work.