| 摘要 |
An assembly extends the depth of field in an optical system that compresses light rays using a lens. The optical system incorporates four phase plates/filters in the lens pupil plane along an optical axis (z-plane). The four optical plates/filters are non-spherical and together form a system with a cubic phase sequence. Two slide-positioned optical plates are located in the lateral x-direction, and two slide-positioned optical plates are in the lateral y-direction. The simultaneous change in position delta with respect to each other of the relative position of the pairs of plates, is the same is the same as their change in lateral position with respect to the optical axis. |
