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What Does a Scanner See: How Does it Work

Both 2D and 3D scanners have been around for quite some time now, and we never seem to run out of uses for them. Find out more from scanning things.

While the former is a regular device that is common in most office, the latter is still popular for experimenting. Most workplaces are keeping a 3D scanner along with the regular one just to be on the safe side.

Using a scanner: How Do You Get the Most Out Of It?

Your scanner does not have any sort of vision which means that it only sees black space.

Follow these steps when scanning your next document.

  • Place the document in question on the glass plate and then put down the lid of the scanner.
  • When you press on Start, a light will appear on the document.
  • You will find the scan head moving in the direction of the document in order to make one complete scan.
  • In case the scan head failed to get a to successful pass, it will repeat the process. Attaching it to the stabilizer bar helps in making it stable.
  • After the pass, the picture of the document in question is reflected to another mirror by an angled mirror. While most scanners use two mirrors, there are others that use three. The curved surface helps project the image further.
  • This image will then be reflected to the lens using these mirrors.
  • Now, you will find the lens working together with the filter trying to focus the image for further processing in the CCD array.
  • Once it is done, the CCD array will change the image into a form of data that is easily comprehensible for your computer.
  • You can now view the image on your computer and decide what you want to do about it.

Does it Work the Same for all 3D Scanners?

On the other hand, 3D printers use laser scanning to achieve better and more accurate results. Just to note, you could buy a 3D scanner according to your needs. For instance, you can go in for flatbed scanners, which are known as desktop scanners too and they are the most popular option.

However, you could also go in for sheet bed scanners, which are relatively immobile but is pretty portable in spite of that. The way a scanner will work will also vary according to its type.

For instance, if you are buying yourself a drum scanner, you would expect to see some great detailed images. However, they use a technology called photomultiplier tube to replicate and create the images. To use it, the document is first scanned and then loaded on to a glass cylinder. Here, a sensor helps replicate the document by making light split up and bounce off the document, and go through a color filter before being converted to an electric signal.