💰 What is an Optical Drive & What does an Optical Drive do?

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In computing, an optical disc drive (ODD) is a disc drive that uses laser light or electromagnetic waves within or near the visible light spectrum as part of the.


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Optical disc drive - Wikipedia
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What Is an Optical Disc Drive?
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Optical drives retrieve and/or store data on optical discs like CDs, DVDs, and BDs (Blu-ray discs), any of which hold much more information.


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Optical drives come with two flavors: CD and DVD. You want a DVD. All DVD drives can read CDs, so there's no point in buying a plain CD drive. The next decision.


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Optical drives, that can read and write CDs, DVDs, and sometimes Blu-ray discs, have been an important part of the PC universe for a long time.


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An Optical Drive refers to a computer system that allows users to use DVDs, CDs and Blu-ray optical drives. The Drive contains some lenses that project.


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In computer science, the optical disc drive is the disk drive that uses a laser light as part of the process of reading or writing data from a file to.


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An Optical Drive refers to a computer system that allows users to use DVDs, CDs and Blu-ray optical drives. The Drive contains some lenses that project.


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An Optical Drive refers to a computer system that allows users to use DVDs, CDs and Blu-ray optical drives. The Drive contains some lenses that project.


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An Optical Drive refers to a computer system that allows users to use DVDs, CDs and Blu-ray optical drives. The Drive contains some lenses that project.


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In computer science, the optical disc drive is the disk drive that uses a laser light as part of the process of reading or writing data from a file to.


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Are you still watching? Data is recorded by selectively heating parts of an organic dye layer with the laser, which changes the reflectivity of the dye. Explore over 4, video courses. Try refreshing the page, or contact customer support. Some computer systems no longer have an optical disc drive built-in. Your next lesson will play in 10 seconds. Plus, get practice tests, quizzes, and personalized coaching to help you succeed. Anyone can earn credit-by-exam regardless of age or education level. Keep playing. Log in or sign up to add this lesson to a Custom Course. Sign Up. Instead of music CDs, people buy their digital music online. The next type of optical disc that came on the market was the DVD. The substance can be melted back into crystalline form, making it possible to write multiple times to the disc. Create an account. Finally, if you need to store large amounts of data, you probably end up using an external hard drive, which can store much more data than any optical disc. Optical discs are not going away for now, but their importance continues to decline as online services are taking over their roles. A lot of software is now available through online download. What is a Zip Drive? While this was very frustrating at the time these types of discs came on the market, most modern optical drives are able to read almost any type of disc. Intended initially for movies, they were quickly adopted in computer systems as well. I am a student I am a teacher. More recently, Blu-ray discs came on the market and have a standard capacity of 25 GB. Log In. What is a Motherboard? Modern optical drives can often spin much faster, which results in higher transfer speeds. However, there are also rewritable discs. This diagram uses a CD as an example, but the same general principle applies to other types of optical discs. What Is a Hard Drive? This constant speed is very important for music CDs and movie discs, since you want to listen to music or watch a movie at the regular speed. Save Save Save. For compact discs, or CDs, a wavelength of nanometers nm is used, which is in the infrared range. DVDs and Blu-ray discs work in a very similar manner - the biggest difference is that the pits are much smaller, making it possible to store much more data on a single disc. Try it risk-free for 30 days. What Is a Video Card? This turns the indentations on the disc into binary data. A polycarbonate disc layer contains the actual data A. A sensor located next to the laser converts the reflected laser signal back into digital data. An error occurred trying to load this video. Log in here for access. This means that a disc spins at around rotations per minute rpm when the laser is reading near the outer rim of the disc and at around rpm when reading near the inner rim. This is especially the case for very thin and lightweight laptops where space and weight are at a premium. What Is a Sound Card? As you probably guessed, the 'R' stands for 'read' and the 'W' stands for 'write. Computer software also often comes on one of these discs, so you need an optical drive to install software. For digital video discs, or DVDs, a wavelength of nm red is used, while for Blu-ray discs a wavelength of nm violet is used. In order to write data to a disc, a recordable blank disc is needed. A laser in this context means an electromagnetic wave with a very specific wavelength within or near the visible light spectrum. Most computer systems come with at least one optical drive. What teachers are saying about Study. An optical disk drive ODD uses a laser light to read data from or write data to an optical disc. For other applications, however, such as reading or writing other types of data, working at this speed is not needed. The mechanism to read and write data consists of a laser, a lens to guide the laser beam, and photodiodes to detect the light reflection from the disc. Coming up next: What Is a Hard Drive? Let's take a closer look inside an optical disc. Not sure what college you want to attend yet? This allowed you to play regular music CDs on your computer. You can test out of the first two years of college and save thousands off your degree. Physical damage to an optical disc can result in data loss, since the pits may no longer be read correctly. The standard capacity of a DVD is 4. The earliest optical disc used in computer systems was the CD. Data is represented as tiny indentations in this layer, known as 'pits,' while the areas between pits are known as 'lands. Want to watch this again later? To unlock this lesson you must be a Study. When you see an optical drive reported as a 4x drive, for example, this means it can spin at four times the base speed i. An optical disk drive uses a laser to read and write data. Already registered? Writing data to an optical disc is also referred to as 'burning. Log in. Log in or Sign up. These are like regular CDs but contain read-only media, such as data files or software. To learn more, visit our Earning Credit Page. Artwork is printed on top of the disc D. Cancel anytime. Create your account. Register to view this lesson Are you a student or a teacher? For regular recordable discs, this is a permanent process and data can only be written once. The mechanism for reading Blu-ray discs, however, is quite different. Different types of discs require different wavelengths. In addition to the lens, an optical drive has a rotational mechanism to spin the disc. This has resulted in minor incompatibility issues between certain discs and certain optical drives.

As a member, you'll also get unlimited access to over 79, lessons in math, English, science, history, and more. This allows you to play music or watch movies using pre-recorded discs. Responsibilities of a File Manager in Operating Systems.

Already a member? Optical drives were originally designed to work at a constant linear velocity CLV - this means that the disc spins at varying speeds depending on where the laser beam is reading, so the spiral groove of the disc passes by the laser at a constant speed. The sensor records the changes from pits to lands or vice versa as a one and no change as a zero. A layer of lacquer C protects the shiny layer and prevents oxidation. Just checking in. Try Study. What Is Primary Storage? Find a degree that fits your goals. An optical drive that can work with multiple types of discs will therefore contain multiple lasers. However, the popularity of optical discs has been declining for some time. Most modern drives allow you to write to an empty disc, so you can create your own music CDs or create a backup copy of important data. In this case, the laser is used to melt a crystalline alloy in the recording layer of the disc. What Is a Floppy Disk? Did you know… We have over college courses that prepare you to earn credit by exam that is accepted by over 1, colleges and universities. The optical mechanisms for reading CDs and DVDs are quite similar, so the same lens can be used for both types of discs.