How well is a beam collimated? This is an essential question for many optics, especially in laser applications. Shearing interferometry is a simple and convenient way to test beam collimation quality, and we demonstrate this in VirtualLab Fusion. The key device in the interferometer is a shear plate, with high-quality flat surfaces and usually with a small wedge angle. We can model the multiple interactions between light and the shear plate easily with the help of the channel concept in VirtualLab Fusion.
Collimation Testing with Shearing Interferometry
We show how to build up a shearing interferometer for the testing of laser beam collimation. We observe the change in the interference fringes caused by changing the collimation lens system.
Newsletter/News Collimation Testing, Shearing Interferometry, interferometer In VirtualLab Fusion we can model the multiple interaction between light and the shear plate easily with the help of the channel concept.