Langer Gregor, Hochreiner Armin, Burgholzer Peter, Berer Thomas
Christian Doppler Laboratory for Photoacoustic Imaging and Laser Ultrasonics, Science Park 2/2. OG, Altenberger Straße 69, 4040 Linz, Austria.
Opt Lasers Eng. 2013 May;51(5):571-575. doi: 10.1016/j.optlaseng.2012.12.010.
Beam profiles are commonly measured with complementary metal oxide semiconductors (CMOS) or charge coupled devices (CCD). The devices are fast and reliable but expensive. By making use of the fact that the Bayer-filter in commercial webcams is transparent in the near infra-red (>800 nm) and their CCD chips are sensitive up to about 1100 nm, we demonstrate a cheap and simple way to measure laser beam profiles with a resolution down to around ±1 μm, which is close to the resolution of the knife-edge technique.
光束轮廓通常使用互补金属氧化物半导体（CMOS）或电荷耦合器件（CCD）进行测量。这些器件速度快且可靠，但价格昂贵。利用商用网络摄像头中的拜耳滤光片在近红外（>800nm）波段是透明的，并且其CCD芯片对高达约1100nm的光敏感这一事实，我们展示了一种廉价且简单的方法来测量激光光束轮廓，分辨率可达±1μm左右，这接近刀口技术的分辨率。
