Laser Focus

The characteristics of laser that makes it different from other sources of light is (spatial) coherence. What this means is that the light emitted by laser is able to be concentrated in a tight spot. (You are not paying attention 🧐), what I mean is that laser can be focused on a tiny spot; as small as a very tiny teeny-weeny dot.

When you focus normal light on a spot on a wall (e.g flashlight), it has the tendency to spread out. By spreading out, this is what I mean; if you drop a blue ink on a wet white cloth, the ink will spread. This is how a normal light beam spreads out when you try to focus it on a point. But laser don’t spread out, here is an example;

Assuming you use a 10 mm focal length lens to focus a helium-neon laser on a spot, the diameter of the spot will be about 8 µm (micro meter). Follow me on this one 😀, 8 µm is equal 0.008 mm; that is, if you divide 1 mm into 100 parts (then 80% of 1 part). That spot is sooooooo tiny…

Remember I mentioned spatial coherence earlier? Yeah, it also helps laser to STAY NARROW over great distances, enabling applications such as laser pointers. But that is not what this post is about. Because a laser beam can stay narrow, it is possible to concentrate heat source in a laser beam. If you further concentrate this heated laser beam through an optic lens, you will get laser cutter (capable of cutting through metals).

To stay laser focus is no small feat; and we say in Nigeria, “no be beans; talk less of moi-moi.”

In today’s world, while focus is important, laser focus is “importanter”. There are so many things that will struggle for your time, energy and resources, you should only pay attention to things that matter. If you have a passion, laser-focus on your passion; if you’re in school, laser-focus on learning; if you’re working, laser-focus on improving the value of your company; if you’re dating, laser-focus on your beau; if you’re married, laser-focus on your spouse. Imagine if you laser focus on the wrong thing? 🤔🤭🤫 no think am ooOO…

Most of the stress you’re experiencing right now is your fault. You chose to expend time, energy and resources on things that don’t matter in that moment.

Till next time…