How to understand CCD simply

What is a CCD?

CCD is the prefix for the English charge-coupled device, also known as an imaging device. Its function is to convert the image presented by the optical lens into an electrical signal for storage in the storage medium, also known as a photoelectric conversion device, and the number and size of pixels on it directly affect the image quality. The more pixels, the better, and the bigger the size, the better.

CCD is an important device for digital cameras

A CCD is a collection of light receivers (pixels) that receive light passing through a lens and convert it into an electrical signal. Its Chinese name is charge coupler In the case of the same number of pixels, the larger the CCD size, the larger the unit pixel. In this way, more light can be collected per unit of pixel, so it can theoretically be said to be beneficial for improving image quality.

Today's 5-million-pixel or 6-million-pixel digital cameras generally use 1-inch, 1-inch, and 1-inch CCDs. Generally speaking, the larger the CCD, the better, in the case of equal pixels

Most of the home cameras are home machines with 1ccd and 3ccd. 3CCD for broadcast and professional grades.

To put it simply, CCD is a color sensor array.

When light passes through the lens and is imaged on the CCD, each point of the CCD will represent the color as an analog signal, which will be converted into a digital quantity after a D conversion.

The colors of each point are concentrated in one piece, which is a **.

CCD is the abbreviation of Charge Coupled Device in English, which can convert optical images into digital signals.

The simple understanding is that the film in the film camera, but the film is disposable, and the CCD can be reused.

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Analysis: CCD, is the abbreviation of charge coupled device in English, it is a special semiconductor device, there are many of the same image sensors, each sensor is called a pixel. CCD is an extremely important component in the camera, it plays.

The function of converting light into electrical signals is similar to that of the human eye, so its performance will directly affect the performance of the camera.

There are many indicators to measure the quality of CCD, including the number of pixels, CCD size, sensitivity, signal-to-noise ratio, etc., among which the number of pixels and CCD size are important indicators. The number of pixels refers to the number of sensors on the CCD. The image captured by the camera can be understood as consisting of many small dots, each of which is a pixel.

Obviously, the more pixels you have, the clearer the picture will be, and if the CCD doesn't have enough pixels, the sharpness of the captured image will be greatly affected, so theoretically, the more pixels the CCD has, the better. However, the increase of the number of CCD pixels will reduce the manufacturing cost and the yield rate, and under the current TV standard, after the number of pixels increases to a certain number, the effect of increasing the clarity of the shooting picture becomes not obvious, therefore, the number of pixels of about one million is enough for general use.

A single CCD camera refers to a single CCD in the camera and uses it to convert the photoelectric light signal and color signal, in which the chromaticity signal is completed by some specific color mask devices on the CCD and combined with the back circuit. Since a CCD completes the conversion of luminance signal and chromaticity signal at the same time, it is inevitable to have both, so that the photographed image cannot meet the requirements of the professional level in color reproduction. To solve this problem, 3CCD cameras appeared.

3CCD, as the name suggests, is a camera that uses 3 CCDs. We know,If the light passes through a special prism,It will be divided into red,Green,Blue three colors,And these three colors are the three primary colors used in our TV,Through these three primary colors,All TV signals including brightness signals can be generated。 A 3CCD system is formed if each color is received separately by a CCD and converted into an electrical signal, and then processed by a circuit to generate an image signal.

Compared with single CCD, since 3CCD converts red, green, and blue signals with 3 CCDs respectively, the image taken is more natural than single CCD in terms of color reproduction, and the brightness and clarity are better than single CCD. However, due to the use of three CCDs, the ** of 3CCD cameras is much more expensive than single CCD, so only professional cameras will use 3CCD.

CCD charge-coupled device, a detection element that indicates the signal size with the amount of charge and transmits the signal in a coupled way, has the advantages of self-scanning, wide sensing spectrum range, small distortion, small size, light weight, low system noise, low power consumption, long life, high reliability, etc., and can be made into a very high degree of integration.

CCD is an extremely important component in the camera, which plays the role of converting light into electrical signals, similar to the human eye, so its performance will directly affect the performance of the camera.

CCD is a charge-coupled device, a kind of detection element that indicates the signal size with the amount of charge and transmits the signal in a coupled way, which has the advantages of self-scanning, wide sensing spectrum range, small distortion, small size, light weight, low system noise, low power consumption, long life and high reliability, and can be made into a combination with very high muffiness before integration.

CCD is widely used in digital photography, astronomy, especially optical telemetry technology, optical and spectrum telescopes and high-speed photography technology, such as Lucky is widely used in video cameras, digital cameras and scanners, but the camera uses a dot matrix CCD, that is, including X, Y two directions for the acquisition of plane images, and the scanner uses a linear CCD, it only has X one direction, Y square cover jujube scanning is completed by the mechanical device of the scanner.

CCD charge-coupled device, a detection element that indicates the signal size with the amount of charge and transmits the signal in a coupled way, has the advantages of self-scanning, wide sensing spectrum range, small distortion, small size, light weight, low system noise, low power consumption, long life, high reliability, etc., and can be made into a very high degree of integration.

CCD is used in: digital photography, astronomy.

CCD is an image sensor for charge coupling devices.

It is made of a high-sensitivity semiconductor material, which can convert light into electric charge, which is converted into a digital signal through an analog-to-digital converter chip, and the digital signal is compressed and saved by the camera's internal flash memory or internal hard disk card, so that the data can be easily transmitted to the computer, and with the help of the computer's processing means, the image can be modified according to needs and imagination.

CCD is a charge-coupled device, a kind of detection element that uses the amount of charge to represent the signal size and transmits the signal in a coupled way, which has the advantages of self-scanning, wide range of sensing spectrum, small distortion, small size, light weight, low system noise, low power consumption, long life and high reliability, and can be made into a very high degree of integration.

CCD is widely used in digital photography, astronomy, especially optical telemetry technology, optical and spectrum telescopes and high-speed photography technology, such as Lucky is widely used in video cameras, digital cameras and scanners, but the camera uses a dot matrix CCD, that is, including X and Y directions for acquiring plane images, while the scanner uses a linear CCD, which has only one X direction, and the Y direction scanning is completed by the mechanical device of the scanner.