Beam expanding device capable of improving laser self-adaption compensation resolution

• Main Authors: WANG ZHENGUO, YAN XIONGWEI, ZHANG JUN, WU DENGSHENG, LI MINGZHONG, ZHANG XIONGJUN, HU DONGXIA, JIANG XINYING, WANG DEEN, TIAN XIAOLIN, ZHENG JIAN'GANG, SU JINGQIN, KANG MINQIANG, ZHU QIHUA, DAI WANJUN, ZHENG KUIXING
• Format: Patent
• Language: English
• Published: 06.05.2015
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The utility model discloses a beam expanding device capable of improving laser self-adaption compensation resolution and belongs to the laser amplifier field. The beam expanding device comprises a first convex lens, a second convex lens and a distorting lens, wherein the first convex lens, the second convex lens and the distorting lens are sequentially arranged along the laser forward direction, the focal length f1 of the first convex lens is smaller than the focal length f2 of the second convex lens, and primary optic axes and focal points of the first convex lens and the second convex lens are correspondingly superposed. The device can enlarge light spot dimensions of laser by f2/f1 times before laser incidence into the distorting lens, utilizes more distorting lens units for wavefront distortion compensation, improves compensation resolution and further reduces processing difficulty and processing cost of distorting lenses.