Collimated beam divergence angle detection device and divergence angle detection method

• Main Authors: LI JUNFENG, LAN WENKE, ZHENG JIALE, WU XUEQIN, SUN WENJIE, WANG ZEKAI, CHEN YIKAI, SHEN ZHONGHUA
• Format: Patent
• Language: Chinese; English
• Published: 09.05.2023
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention discloses a collimated beam divergence angle detection device and a divergence angle detection method. According to the device, detected light can be focused through the lens group, passes through the cylindrical prism and is incident to the surface of the photonic crystal, and a light beam excites a Bloch surface wave on the photonic crystal and then is reflected and emitted; and the CCD collects and records emergent light from the direction of the cylindrical prism. According to the device, whether incident light is collimated or not can be monitored and judged according to the bending degree of an image formed in the CCD, and the divergence angle of the incident light is calculated. The device provides a novel collimated light beam judgment and divergence angle detection mode, and is economical, convenient, rapid in response and accurate in detection. 本发明公开了一种准直光束发散角检测装置及发散角检测方法。该装置可通过透镜组将被测光聚焦通过柱棱镜并入射到光子晶体表面，光束在光子晶体上激发布洛赫表面波后反射并出射；CCD将收集记录来自柱棱镜方向的出射光。本装置可以通过CCD中所成图像的弯曲程度来完成对入射光线是否准直的监测与判断，并计