Unstable optical resonators with tilted spherical mirrors

摘要

Tilted spherical mirrors are used as a means of achieving asymmetric magnification (Mx NOTEQUAL My) in collimated-output unstable resonators which obviate fabrication difficulties associated with non-spherical mirrors. By suitable choice of rather large tilt angles of spherical mirrors and mirror separation, simultaneous "confocality" can be achieved in x-z and y-z planes to the lowest order.