Brainiac75

Bad Beams? | How divergent are lasers? (Patreon)

Published:

2021-05-28 18:18:00

Imported:

2026-06

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Content

You would think after 12 years of making videos that I have an idea of how much work is needed to make a video idea come true.

Nope... I thought a video about measuring a laser beam's divergence would be quick and easy. Just measure the beam width at two different distances. How hard can it be?

Well... hard once you try it in practice. The width of a laser beam or its spot is not obvious! Not to mention the safety aspects when measuring strong laser dots.

Watch me give it a try.

Files

Previews only

Bad Beams? | How divergent are lasers?

Laser beams are amazing to watch since they appear like a string of light. Not like a wash of illumination from other light sources. But does a laser beam spread out? Does it diverge - getting wider over distance? Let's measure the divergence of my cheapest and most expensive lasers! LaserCube WiFi 2.5W and ND8 filter for it donated by https://www.wickedlasers.com See the correction optics in the 2W version here: https://www.youtube.com/watch?v=X5xGaVh67fM Measuring power and wavelength of my strongest lasers, including the Laserglow Hercules: https://youtu.be/c4RsQdyjgJE Did you miss one of my videos?: https://www.youtube.com/user/brainiac75/videos My Patreon-page: https://www.patreon.com/Brainiac75 FULL MUSIC CREDITS Time codes: 0:01 + 0:33 + 9:44 "Fluidscape" Kevin MacLeod (incompetech.com) ISRC: USUAN1100393 Time codes: 0:17 + 11:05 "Darkness is Coming" Kevin MacLeod (incompetech.com) ISRC: USUAN1100584 Time codes: 0:42 + 10:08 "Lightless Dawn" Kevin MacLeod (incompetech.com) ISRC: USUAN1100655 Time codes: 2:34 + 7:15 "Perspectives" Kevin MacLeod (incompetech.com) ISRC: USUAN1300027 Time code: 5:56 "Neo Western" Kevin MacLeod (incompetech.com) ISRC: USUAN1100615 All music above licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/ Time code: 9:18 Mix of two tracks: 1) The Shimmering by fran_ky (freesound.org/s/237363) Licensed under Creative Commons 0 license 2) "Spacial Harvest" Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/ ISRC: USUAN1100653 #Divergence #Laser #Brainiac75