论文标题
使用可承受成本的设备的激光斑点测量
Laser spot measurement using cost-affordable devices
论文作者
论文摘要
我们已经设计并测试了一种自动化的简单设置，以快速使用三个成本可承受的光传感器快速测量高斯激光束的轮廓和斑点。实施了两种分析技术：使用单个光电二极管和一个LDR的CMOS 2D阵列（网络摄像头）和类似于刀具的扫描刀的成像。比较方法和传感器，以使用两种不同波长和技术的激光器来确定其准确性。 我们验证是否可以使用低成本网络摄像头确定光束腰部不确定性为1％的激光器的轮廓，腰围位置误差1.5％，确定最小斑点半径的误差少于3％。光电二极管测量是最稳定的，因为它不受激光强度变化的影响。此外，我们表明可以使用廉价的LDR传感器以11％的误差来估计激光斑点大小。
We have designed and tested an automated simple setup for quickly measuring the profile and spot size of a Gaussian laser beam using three cost-affordable light sensors. Two profiling techniques were implemented: imaging for the CMOS 2D array (webcam) and scanning knife-edge-like using a single photodiode and an LDR. The methods and sensors were compared to determine their accuracy using lasers of two different wavelengths and technologies. We verify that it is possible to use a low-cost webcam to determine the profile of a laser with 1% uncertainty on the beam waist, 1.5% error on the waistline position, and less than 3% error in determining the minimum spot radius. The photodiode measurement is the most stable since it is not affected by the change in laser intensity. In addition, we show that it is possible to use an inexpensive LDR sensor to estimate the laser spot size with an 11% error.
