摘要
为了提高环形激光陀螺(RLG)的空间环境适应性,提出了基于菲涅耳透镜的RLG抗辐照读出方案。该方案采用菲涅耳透镜对RLG输出的顺/逆时针光进行会聚,在其焦平面前方得到了条纹数不变、尺寸显著减小的干涉条纹。相比于采用普通凸透镜,基于菲涅耳透镜的读出系统在球差校正和安装便利性等方面更具优势。计算结果表明,该方案能将RLG输出光斑尺寸降低到原水平的1%以下,显著降低了对光电管的尺寸要求,从而大幅减小了辐照对探测器的损伤,提高了RLG的空间环境适应性。
In order to improve the adaptability of ring laser gyro （RLG） in the outer space environment, a method about RLG output system based on Fresnel lens is proposed. After being converged by the Fresnel lens, the RLG＇ s clockwise and anticlockwise beams forge a new array of fringe patterns in front of the focal plane, where the number of patterns does not change, but the size is significantly reduced. Compared with the ordinary convex lens, the Fresnel lens based RLG readout system may bring up advantages in the spherical aberration calibration and installing convenience. It is validated that compared with the traditional RLG readout system, this system can decrease the size of the beam spot down to less than 1%, enabling a smaller photodiode to be selected, and the radiation damage is significantly reduced, therefore the RLG＇s adaptability of RLG in the outer space environment is improved.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2015年第2期34-39,共6页
Chinese Journal of Lasers
