Emitting system of fiber-array 3D laser imaging using off-axis three-mirror system
Citation
侯 佳 (Hou Jia), 何志平 (He Zhiping), & 舒 嵘 (Shu Rong). (2016). 离轴三反光纤阵列激光三维成像发射系统 (Emitting system of fiber-array 3D laser imaging using off-axis three-mirror system). 红外与激光工程 (Infrared and Laser Engineering), 45(4), 0406001. doi: 10.3788/IRLA201645.0406001
Keywords
- 离轴三反 / Off-axis three-mirror
- 光纤阵列 / Fiber-array
- 激光三维成像 / Laser 3D imaging
- 发射系统 / Emitting system
- 准直系统 / Collimating system
- 发散角 / Divergence angle
- 焦距 / Focal length
- 数值孔径 / Numerical Aperture - NA
- 视场 / Field of view
- 推帚式成像 / Push-broom imaging
- 光斑 / Footprint/Spot
Brief
This article presents a novel fiber-array laser emitting system for 3D imaging that utilizes an off-axis three-mirror design to achieve micro-radian level divergence angles for multiple laser beams.
Summary
This article from Hou Jia et al. proposes a new laser emitting system for 3D imaging that combines a fiber array for beam splitting with an off-axis three-mirror optical system for collimation. This design aims to generate multiple laser beams with micro-radian level divergence angles and uniform spacing on the target. By using a forward design, reverse use approach for the off-axis three-mirror system, with the fiber array placed at its focal plane, the system can achieve a large field of view without being limited by the number of laser beams. An example system achieving 51 beams with a 20 μrad divergence angle is presented, demonstrating its capability for high-resolution laser 3D imaging. This approach is presented as an improvement over traditional methods using diffraction gratings or microlens arrays, offering smaller divergence angles, better beam uniformity, and scalability for future high-resolution spaceborne applications.
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