[19a-Z09-1~9] 3.2 材料・機器光学

[19a-Z09-4] Simple Method to Realize Axicon Lens Using Liquid Crystal

劉 志強¹、陳 曉西¹、〇葉 茂¹ (1.電科大)

キーワード：液晶

Axicon lens also known as conical lens or rotationally symmetric prism is widely used in different scientific research and application. It can be used to convert a parallel laser beam into a ring, to create a non-diffractive Bessel beam or to focus a parallel beam into long focus depth. Generally, the spot size of a Bessel beam is fixed for a given experimental setup. To change the Bessel beam spot size, the apex angle of axicon must be changed. In this paper, we report a simple method to realize an axicon lens using liquid crystal.