Design method of free-form surface cylindrical lens for realizing uniform light emission of MEMS (Micro Electro Mechanical System)

• Main Authors: SUN QILIANG, CHENG JIN, YANG ZHIRUI, TAN YEQING, XU NAITAO
• Format: Patent
• Language: Chinese; English
• Published: 23.02.2024
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention discloses a free-form surface cylindrical lens design method for realizing MEMS uniform light emission, and relates to the field of optical lens design, and the method comprises the steps: building a mapping relation between MEMS light emission energy and a target plane area; giving vertex coordinates of the free-form surface generatrix, and determining coordinates of other points on the free-form surface generatrix according to the mapping relation; connecting all the points to form a free-form surface generatrix, and constructing a free-form surface cylindrical lens based on the free-form surface generatrix; the lens is arranged between the MEMS and a target plane, so that light energy of emergent light beams scanned by the MEMS reaching all positions of the target plane after being refracted by the lens is equal. The MEMS is matched with the lens to provide surface structured light with high uniformity and high energy utilization rate for subsequent three-dimensional reconstruction. 本发明公开了一种实