<title>Offner-type pupil relay optics for a scanning system</title>

In scanning systems such as a Retinal Scanning Display, the pupil at the first scanning device is relayed onto a second scanning devices, which again is relayed onto the entrance pupil of the eye. The optics relaying the pupil not only must well image this pupil, but also the scanned beam must be imaged with good quality on the retina and the distortion must be low. We compared an Offner-type pupil relay with two more conventional systems. It appears that the Offner-type pupil relay has very good optical properties and can be especially useful as the first pupil relay in a Retinal Scanning Display.