Transforming a green laser pointer in a self-mixing interferometer capable of submicrometer vibration sensing
![Darren Long on Twitter: "Sure, they're annoying but are laser pointers really weapons? Hong Kong student arrested for possessing a laser pointer https://t.co/FwTq1UokrK via @scmpnews https://t.co/xYCuQ1Dt9r" / Twitter Darren Long on Twitter: "Sure, they're annoying but are laser pointers really weapons? Hong Kong student arrested for possessing a laser pointer https://t.co/FwTq1UokrK via @scmpnews https://t.co/xYCuQ1Dt9r" / Twitter](https://pbs.twimg.com/media/EBalCGYU0AEmqQe.png)
Darren Long on Twitter: "Sure, they're annoying but are laser pointers really weapons? Hong Kong student arrested for possessing a laser pointer https://t.co/FwTq1UokrK via @scmpnews https://t.co/xYCuQ1Dt9r" / Twitter
![How laser pointer is made - material, history, used, parts, components, steps, History, Raw Materials, Design How laser pointer is made - material, history, used, parts, components, steps, History, Raw Materials, Design](http://www.madehow.com/images/hpm_0000_0007_0_img0066.jpg)