The principle of auto-focusing of mobile phone camera!

The principle is that the light emitted by the object will converge to one point after passing through the lens of the camera. This is an image of a point on an object. A luminous object can be regarded as countless luminous points, and the light emitted by the lens is gathered into the image of countless points, and the whole is the image of the object.

Mobile phones with built-in cameras have been widely used, and the mobile phone camera industry has also developed well. Various mobile phone camera manufacturers have mushroomed, and the types of mobile phone cameras are becoming more and more abundant. The camera function of mobile phones has become the focus of attention of mobile phone users.

Extended data:

The main parameters measured by the camera. Resolution (pixel resolution) is one of the most common parameters. The resolution is mainly determined by the image sensor. The higher the resolution, the finer the image and the better the effect, but the image takes up more storage space.

Generally speaking, the camera pixel is the largest pixel in camera mode, and the pixel in camera (video shooting) is usually smaller. For example, the N97 camera has 500W pixels, but the maximum resolution in camera mode is only 640 x480.

Special terms (such as CIF, VGA, etc.) to explain the resolution of mobile phone camera and image resolution. ) is often used to indicate the resolution (pixel = resolution multiplied by the length and width value, such as: 640X480=307200, that is, 30W pixels):

Baidu encyclopedia-mobile phone camera