Off-axis collimator

      Colimator is a necessary testing instrument of modem optical instrument installment,  commissioning and testing, and it is mainly used for optical machine instalment and commissioning, optical system latentparameter measurement, image qualitly evaluation,  etc. According to different targets adopted, collimatolcan be used for multiple purposes,  such as the visual resolution, focal distance, distortion, position of thefocal plane, as well as the modulation transfer function and signal-to-noise ratio of the whole machineend-to-end image testing, etc.