What is the CCD chip? Do the security must know knowledge of CCD chip

What is the CCD chip? Do the security must know knowledge of CCD chip
The development of the security industry for many years, engaged in security people have millions more, but the security industry is an emerging industry, each big bookstore,
Impossible to find, the monitoring technology books, concept about the monitoring chips all over the years are not very clear, small today make up the hope can bring the big
More understanding of the.
1, what is the CCD
Answer: CCD full name is charge coupled device, Chinese translated as "charge coupled device". Semiconductor materials it uses a high sensitivity
Made of, can light into electric charge. It has the advantages of high sensitivity, anti glare, small distortion, small size, long life, vibration resistance etc.. While the
The photosensitive element is called "pixel". The CCD pixel number is more, single pixel size is more big, the images collected would be more clear
2, the size of an CCD chip are those?
Answer: CCD imaging size commonly used with 1/2 ", 1/3" 1/4 "the smaller size of the monitoring camera size can be made smaller. In the same light
To learn under the lens, image size is greater, the greater field of view angle. The size of chip sizes imaging surface (width x height) diagonal (1/2) 6.4x4.8mm8mm (1/3)
4.8x3.6mm6mm
3, what is the CCDHAD sensor
Answer: HAD (Hole-AccumulationDiode) sensor is a p type in the N substrate, n+2, the surface polar body, positive hole plus accumulation layer, this is
Construction of Sony unique. Due to the design of this hole accumulation layer, can make the sensor surface often dark current obtained solution. In addition, in the N type
Vertical type tunnel substrate design electronic through, the opening rate, in other words, also improves the sensitivity. In the early 80's, the Sony
Lead used in variable electronic shutter products, in the shooting object moving fast also can obtain a clear image.
4, what is the superHADCCD
Answer: unit area CCD is more and more small, micro lens technology, have been unable to enhance the sense of brightness, if the CCD components on internal amplifier
High rate increase, will make the noise is also improved, quality will be affected obviously. Sony in CCD technology research and development and further, before the
With the technical improvement of tiny lenses, raised light utilization, development will shape optimization technique is Sony lens, SUPERHADCC technology. Basically is to
Improve the light utilization efficiency to improve the design sense of brightness, it also laid the foundation for the basic CCD technology at present.
5, what is the ExviewHADCCD?
Answer: the ratio of infrared light, visible light wavelength longer, also can do the photoelectric conversion in semiconductor silicon chip. But to the current date, CCD will not
Charge these after the photoelectric conversion, the effective method to collect sensor. Therefore, Sony new development in 1998 "ExviewHADCCD" technology
Can the near - infrared light had failed to effectively use, effectively converted into image data with. So the visible light range extended to infrared, makes sense
Brightness can be improved greatly. Use the "ExviewHADCCD" component, in a dark environment can also get high brightness photos. But before the silicon plate
Photoelectric conversion in deep do, will leak into the smear linear components of vertical CCD part, can also be collected inside the sensor, so the impact on image quality of the complex
News will be substantially reduced
6, what is the scanning system, commonly used are those?
Answer: TV system refers to the specific system and technical standards of the television system using a country's. Specifically, for now the world has three
A television system, at present, most countries in the world (including most of Europe, Africa, Australia and Chinese) using PAL system, using 25FPS USA frame rate
, Japan, Canada and other countries is a National Television Standards Committee (NTSC) formulation of the NTSC system, using the 30fps frame rate (precisely as
29.97fps); used mainly for France, the former Soviet Union and Eastern European countries with another mode of SECAM.
What is 7, the CCD camera work?
Answer: the object of the image through the camera lens to CCD chip, CCD charge according to the light intensity of the corresponding proportion of each pixel accumulation, the accumulation of
Charge in the control of video sequence, point by point out, filtering, amplification, form the video signal output. The video signal is connected to the monitor or electric
Video input as the machine end can see and plateau was images of the same video image.
8, what is the pixel camera?
Answer: the pixel is one of the important indexes to measure the camera CCD. In general, the pixel high product the image quality better. But another
Is also not a pixel the higher the better, for the same picture, an image of the ability of the more pixels are stronger, in order to achieve high resolution
Image or picture, the amount of data it will also much larger, the storage requirements will be higher.
9, what is the camera resolution?
Answer: usually refers to the horizontal solution, unless specifically designated "vertical". Evaluation of camera resolution index is the horizontal resolution, the unit
The TVL line, the number of black and white scanning line that imaging can distinguish. The black and white camera used resolution is generally 300-1000, color 300-700
The numerical value is greater, more clear imaging.