How Camera Works? Working of Camera Explained with 3D Animation

3D Animation Tech

How Camera Works? Working of Camera Explained with 3D Animation #camera #cameras #cameraworking

Transcript

00:00Why do others always take better pictures than you when you take pictures with a camera?

00:04It's because you don't understand how digital cameras work.

00:08Through this video, we learn how a digital camera acquires data from tens of millions

00:13of pixels and processes it to restore a painting within one second.

00:17We see the box on the table as green because light shines on it.

00:20This box absorbs light and all colors except green, which is not absorbed,

00:24will be reflected, reaching our eyes.

00:27After processing by the brain, it tells you that this is a green box.

00:31Similarly, when reflected light reaches the camera, it first enters through the camera lens.

00:36There is a set of concave and convex lenses in the lens,

00:39which are used to enlarge and reduce the image.

00:42This process is called optical zoom.

00:45The hole in the middle of the lens is called the aperture.

00:47It consists of five to nine aperture blades.

00:50By controlling the opening and closing size of the holes,

00:53it can increase or decrease the light entering the camera.

00:56The aperture is very important for photography, which will be explained in detail later.

01:01When the light passes through the lens and reaches the main mirror,

01:04the camera begins to work truly.

01:06The main mirror, set at an angle of 45 degrees,

01:10reflects all the light to the pentaprism, located directly above the main mirror.

01:14At this time, we can clearly see any object in the viewfinder.

01:18The clicking sound you hear when taking pictures comes from the rainproof box of the shutter.

01:22It is located behind the main mirror, and the image sensor is located behind the shutter.

01:27The shutter is closed during normal times.

01:29Its opening and closing are all controlled by being driven by an independent micromotor,

01:35and it can open and close in as little as eight thousandths of a second.

01:38The function of the shutter is to control the exposure time of the camera.

01:42When we press the photo button, the main body will flip upward,

01:46blocking the viewfinder and releasing light toward the shutter.

01:49The shutter consists of two curtains, blades used to block light.

01:53When light reaches this point, the lower curtain leaves will fall.

01:56Light passes through the shutter and shines on the image sensor.

01:59When the shutter is open for a specified time,

02:02a second curtain falls from above to block the light.

02:05At this time, the shutter returns to its closed state.

02:09Next, it's time for the image sensor to start working.

02:12It can be said to be the heart of the camera.

02:14After we enlarge it, we can see many squares, which are all pixels.

02:18Suppose you have an eight megapixel camera,

02:20then its image sensor will have eight million pixels.

02:23Each of these pixels is a photodiode, which is similar to the working principle of a solar panel.

02:28Once light shines on it, all the pixels in it will begin to move and create an electric current.

02:34It is divided into three layers.

02:36The top one is the microlens, and the middle one is the color filter.

02:40The first is the photodiode, which is what we call a pixel.

02:43Let's take a look at how individual pixels work.

02:46Let me explain it first.

02:47In fact, the camera only has three colors, red, green, and blue.

02:51But the combination of these three colors creates other colors.

02:55The first is the microlens, which is responsible for focusing the light on the pixel.

03:00So when the light reaches the green device and passes through the microlens,

03:03the green device will recognize these colors

03:06and combine them before passing them to the pixel diode.

03:09It is a light-sensing device that converts light into electrical current.

03:14In fact, this photodiode is a PN junction.

03:17When light shines on it, the electrons inside start two zanths of a second.

03:22The function of the shutter is to control the exposure time of the camera.

03:26When we press the photo button, the main body will flip upward,

03:29blocking the viewfinder and releasing light toward the move.

03:32The faster the electrons move, the greater the current intensity.

03:36Each pixel is equipped with a capacitor and amplifier.

03:39The capacitor stores the charge and prevents it from being lost.

03:43The amplifier amplifies the charge and sends it to the magic converter through a bus.

03:48And then the converter converts the current intensity information into zero and one numbers

03:54and then transfers it to the memory to form the photo we want.

03:57All the above operations are completed when you hear the camera click.

04:01Regarding the content of this aperture, we will have a video to explain it later.

04:05Like and follow for more informative 3D videos.

Category

Transcript

Recommended