Details

Autor(en) / Beteiligte

• Kim, Young
• Won, Kanghee
• An, Jungkwuen
• Hong, Jong-Young
• Kim, Yunhee
• Choi, Chil-Sung
• Song, Hoon
• Song, Byonggwon
• Suk Kim, Hong
• Bae, Ki-Deok
• Burm, Jinwook
• Lee, Hong-Seok

Titel

Large-area liquid crystal beam deflector with wide steering angle

Ist Teil von

• Applied optics (2004), 2020-08, Vol.59 (24), p.7462

Erscheinungsjahr

2020

Beschreibungen/Notizen

• A slim beam deflector that satisfies both a large steering angle and a large area can be very useful in various applications. However, a smaller electrode pitch for a large steering angle and enlargement of its area are trade-off relations due to the limited number of control channels in an electrically tunable beam deflector system. For a large steering angle in the active area where actual diffraction occurs, an indium tin oxide electrode of 2 µm pitch was implemented through a stepper lithography. The via-hole process was developed to expand the reduced active area due to the small electrode pitch. We developed a beam deflector with 7200 controllable channels in an active area of 14.4 m m × 14.4 m m . The maximum steering angle is 7.643° at a wavelength of 532 nm.