How to write the essay The Owl and the Luminous Night Vision

Owls and night vision goggles

Some doormen and security guards wear a pair of glasses at night. It turns out that they can see things clearly at night, including thieves.

How could the security guard wear glasses in the dark night? It turns out that people got inspiration from owls.

Owls fly at night and can catch mice. No matter how they fly, they never collide with anything. Do owls emit ultrasonic waves like bats?

In order to clarify this problem, many ornithologists put an owl in a completely dark room and used infrared photography equipment to observe the owl's mouse-hunting activities. There was nothing in the room except some scraps of paper scattered on the ground. Judging from the experimental results, as long as the mouse steps on the shredded paper on the ground, the owl can catch it quickly and accurately.

It turns out that there are extremely abundant columnar cells on the visual retina of the owl's eyes. Columnar cells can sense light signals from the outside world, so the owl's eyes can detect extremely small amounts of light. Owls also have very sensitive hearing, which plays a major role in positioning in dark environments where they cannot see their fingers. The owl's left and right ears are asymmetrical. The left ear canal is significantly wider than the right ear canal, and the left ear has a well-developed ear drum. Therefore, the owl's auditory nerve is very developed. When an owl is searching for prey in a dark environment, its first reaction to the sound is to turn its head, just like we listen attentively when listening to small noises. However, the owl does not really listen attentively. Its role in turning its head is to turn its head. This creates a difference in the time it takes for sound waves to reach the left and right ears. When this time increases to more than 30 microseconds, the owl can accurately distinguish the direction of the sound source.

Science imitated the eyes of an owl and invented a night vision device. Night vision devices are widely used in the military.

As long as we pay attention to the things around us and understand their advantages, we can invent machines that make our lives more convenient.