The record disk is a kind of data carrier that records the data on the CD through the burner. The data that can be stored can be sound, video, program, and so on.It can be divided into one engraving disk and can be written.Lets take a look at the recording knowledge encyclopedia with Xiaobian.
British board working principle
working principle
The working principle of CD-R and DVD-R is to use lasers to burn a small pit (PIT) on the blank plate. Such unevenness represents numbers 0 and 1.To achieve this, a special layer of dye must be applied on the plate.The recording disc is used as the main material of the record layer, and different dyes are reflected in the plates that are different colors.The main markets are mainly gold, green dishes, and blue disks. Their data burning and reading principles are the same.
Principles of folding burning
In physical, the single -layer record mechanism of the DVD+R DL disc is very similar to the single -layer DVD+R disc. This is because the 55 microns between the two layers are far greater than the focus point of the laser beam or the track distance.The center of the laser beam focuses on the track of the carved laboratory.However, when the laser power increases within a short cycle, the dyeing record material will absorb laser ability and change its chemical structure or color.These recorded grooves constitute a concave point corresponding to the DVD-ROM (read-only CD).The DVD player and the DVD-ROM driver detect these tags just like the concave point that reads only the CD-ROM without reading the grooves of the recording plate.
The track of the record plate has slight instability in the long run.Reading the head will also detect the instability of the track and the rotation speed of the control disc.Wobble signals are modulated by some disc information, which contains a location physical address information called ADIP (preset groove address).Adip information also contains a single layer or double -layer, and which layer is the bald head.
Logically, the DVD+R DL version 1.0 is defined only by defining track search (OTP).The spiral orbit on the first layer is outward, but the second layer is the opposite or inward.The recording starts with a data area with a diameter of 24 mm in the first lap of the first layer.When the burner is in the data area with a diameter of 58 mm from the outer ring diameter, it will jump to the second layer to continue the burning from the outer circle.If the burning stops before the innermost circle 24mm, the Lead-OUT area will be created during the end.
British disk storage
1. Sun protection.The record disc is different from the general disc. Do not put it in a strong light, which will affect its use, especially the green disk and blue disk. Because they are very resistant to light, if they are exposed in the scorching sunChange leads to the scrap of the disc.
2. Defense.Users generally be carefully preserved for the data surface of the carved recording. Needless to say.However, everyone is not very concerned about the negative side of the carved record plate (the side of the data is not burned). The paint on the back of the recorded disk was applied very little, and sometimes some cheap bulk discRough surface scratching, if the reflective layer is destroyed from the opposite side of the recording disk, then the recording disk will be declared scrap.
3. Defense.In order to find convenience, the user often puts some labels on the back of the recording dial.I do n’t know that this will make the center of gravity of the disc uneven, and it will produce a large vibration when rotating in the optical drive, especially the optical drive speed is fast, which is not good for the disc and the optical drive.In fact, everyone will find that the plates produced by those large factories (such as Benq) always try to use small inks, and the distribution of inks is also very uniform, which is also the truth.
How to identify the quality of the recorded disk
Folding pay attention to the plate brand
The CD-R/RW record plates do not require high manufacturing process, and many small manufacturers can produce. This is one of the reasons why the fake and shoddy products on the market are flying.When we buy, we must open our eyes, do not buy those inferior plates for the cheapness of the cheapness of the greed, because the only thing that will eventually be injured will only be ourselves.At present, the plates in the domestic market are mostly brands such as Tsinghua Purple CD, Tsinghua Tongfang, Benq, Ledd, Sony, Weibao, Ribao, and McStrer.When you buy it, pay attention to whether you are counterfeit goods, and carefully check the workmanship and surface printing quality of the CD. The best way is to run a few more to compare.
Pay attention to the appearance of the plate
Although the CD-R/RW record disk is not as delicate as the DVD recording disk, it is not as resistant to wear as pirated VCD. Therefore, when we buy a CD-R/RW disk, we must observe whether there is obvious scratches on the surface of the disc surface or whetherFlaxy, if the plate is recorded in the moment, there are obvious defects, such as impurities, bubbles, etc., it means that the hope of the success of the plate is very slim.It should also be noted that the impurities and small scratches in the lacquer seal on the back of the plate. Although they have no direct impact on the success of the burns, both will greatly shorten the life of the plate and violate our use of light to use light.Storage to achieve the original intention of long -term storage of data.
Pay attention to the number of purchases
Some friends have just bought a recorder. They are full of freshness. They always feel that there are a lot of things to be engraved.Once the quality of the plate is not satisfactory, the chance of flying is high. I want to change to another brand, but because I buy too much, I cant bear to eliminate all of them, so I have to slow down.This not only exacerbates the wear of the recorder, but also brings a lot of hidden dangers to the security of the data to save the data. It is likely that it can be read this time, and the next time it will strike.Therefore, when buying a plate, you may wish to pick a few brands first to buy one, test it yourself, and see what your own record machine is the most compatible with that brand of plates.In this way, it can not only pay unnecessary tuition fees, but also understand the temper of your own love, but also reduce the running -in period of the machine and the plate, laying a good foundation for the successful recording in the future.