Zoom lens

摘要

A zoom lens includes a first lens unit including one of an SLM or a VFL, a second lens unit being optically coupled between the first lens unit and a focal plane and including one of an SLM or a VFL, and a control unit controlling focal lengths of the first and second lens units. A distance between the first lens unit and the second lens unit and a distance between the second lens unit and the focal plane are invariable. The control unit changes a magnification ratio of the zoom lens by changing the focal lengths of the first and second lens units.

主权项

1. A zoom lens comprising:
a reflection type spatial light modulator having a single light-reflecting surface that includes a first region and a second region, the second region being optically coupled between the first region and a focal plane of the zoom lens; and a control unit configured to provide a lens pattern to the reflection type spatial light modulator for displaying a first lens having a first focal length on the first region and displaying a second lens having a second focal length on the second region, and control the first focal length and the second focal length, wherein a distance between the first region and the second region, and a distance between the second region and the focal plane are both invariable, and the control unit changes a magnification ratio of the zoom lens by changing the first focal length and the second focal length.