7 Collimating a Beam

############################# Video Source: www.youtube.com/watch?v=Z7Q17-ctQVQ

Collimated laser light is tremendously useful for all kinds of applications - and it is a neat way to check the alignment of a telescope. • Here are two tools that help. • ---------------------------------------------- • Featured papers: • Laser beam divergence utilizing a lateral shearing interferometer: doi.org/10.1364/AO.16.002753 • A Appendix: Practical Guide to Optical Alignment: 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