Computer Generated Holography
Okay, kiddo. Do you know what a hologram is? It's a cool picture that you can see that looks like it's 3D or like it's coming out of the picture. People make them for fun or to help them look closely at things like tiny bugs or things too big to see all at once.
Scientists have figured out how to make these pictures using computers. They call it computer generated holography, but let's just call it CGH for short, okay?
First, they take a picture of the thing they want to bring to life. Then, they put that picture into a computer program. The program makes a bunch of tiny dots on a screen. The dots can be different colors and brightnesses. The computer program uses something called algorithms to tell the dots how to scatter light.
After the computer is done playing with the dots, it prints them onto a special material. Usually, it's a piece of plastic. But get this, the dots aren't just flat on the page. They're all little bumps on the plastic sheet. These bumps are super tiny, even smaller than an ant.
Next, they shine a special kind of light on the plastic sheet with the bumps. When the light hits the bumps, it scatters in different directions. When the light bounces back, it creates a cool 3D image that you can look at from different angles.
It's like playing with a toy car. When you move the car, it looks like it's moving on the road. It's all because of the way the light is bouncing off the sheet with the bumps.
That's it, kiddo. Isn't that cool? CGH can be used for lots of things like medical imaging, helping people make 3D movies or games, and even talking to holographic doctors!
Scientists have figured out how to make these pictures using computers. They call it computer generated holography, but let's just call it CGH for short, okay?
First, they take a picture of the thing they want to bring to life. Then, they put that picture into a computer program. The program makes a bunch of tiny dots on a screen. The dots can be different colors and brightnesses. The computer program uses something called algorithms to tell the dots how to scatter light.
After the computer is done playing with the dots, it prints them onto a special material. Usually, it's a piece of plastic. But get this, the dots aren't just flat on the page. They're all little bumps on the plastic sheet. These bumps are super tiny, even smaller than an ant.
Next, they shine a special kind of light on the plastic sheet with the bumps. When the light hits the bumps, it scatters in different directions. When the light bounces back, it creates a cool 3D image that you can look at from different angles.
It's like playing with a toy car. When you move the car, it looks like it's moving on the road. It's all because of the way the light is bouncing off the sheet with the bumps.
That's it, kiddo. Isn't that cool? CGH can be used for lots of things like medical imaging, helping people make 3D movies or games, and even talking to holographic doctors!