To investigate the range of collimation errors in x-ray rooms and to calculate their possible effects on the radiation dose for anteroposterior pelvic examinations. A collimator test tool was ...

The collimation error in Fourier transform spectrometer has many effects on the interferogram and the spectrogram. By means of modulation, the authors found the ...

Abstract: An analytical method based on the uniform geometrical theory of diffraction (UGTD) for predicting accurately the collimation phase error in a planar phased ...

Abstract: An optically fed phased array must be provided with a means of collimation as well as with a beam steering function. The same phase shifters which are used to steer the beam can be used to ...