Optional equipment. Types of scanners

The rapid development of digital technologies has significantly expanded the capabilities of modern computers. Accordingly, to increase their capabilities, it was necessary to improve the existing ones and the invention of new types of additional equipment. In general, these additionally connected devices are a means of displaying and entering, transmitting and storing information.

The scanner became an essential attribute of office equipment . This device performs the function of transferring the image to a computer view, otherwise - into a digital code. In English, the term "scanner" is perceived as an "analyzer". The modern scanner has learned to analyze and transcode not only images and text from flat surfaces, but has significantly expanded its capabilities. Depending on the capabilities and capabilities, different types of scanners have appeared.

The most common and usual for us are flatbed scanners. They are user-friendly, provide high quality and have an acceptable scanning speed. Externally, this tablet, the scanning mechanism is located behind a special glass.

Handheld scanners differ from the tablet by the lack of an engine. The object is scanned manually. The advantage of a handheld scanner lies in its low cost and mobility. For these advantages, you have to pay with low resolution, reduced speed, narrow scanning bandwidth. Due to manual scanning, image distortions may occur.

Laminating scanners slightly improve the quality of the object display, since the sheet to be scanned is inserted into the appropriate slot and pulled along the guide rollers past the lamp. Possessing smaller dimensions than flatbed, sheet-feed scanners scan individual sheets. For some models, automatic feed is provided, and this makes it possible to quickly scan a rather large volume of documents on separate sheets.

The requirement of careful attitude to the object of scanning led to the fact that scanner types were replenished with planetary scanners used for working with books and obsolete documents. Their feature is the lack of contact with the object of scanning.

Also widely used book scanners. They are designed to work with a variety of print publications. Scanning is printed side up. The operator's work consists in the standard page turning as in normal reading.

Book types of scanners can also have a V-shaped cradle and operate using digital camera technology. Possessing all the advantages of planetary scanners, they scan the book completely without revealing it, providing the so-called gentle scanning mode.

In the printing industry, drum scanners are used. These devices have improved characteristics, their resolution reaches 10,000 dots per inch.

Different types of scanners allow not only copying printed publications. In the trading enterprises, barcode readers have been widely used. These compact devices not only facilitate the work of the seller, but also improve the quality of customer service, allow you to automate the control of the process of selling goods.

Using additional modules allows the normal scanner to turn into a slide scanner. Due to this significant expansion of the functionality, it is possible to scan images directly from photo negatives, slides, information printed on tracing paper and other transparent surfaces. Modern industry for professional work also produces independent devices with increased characteristics. Conceived such a scanner is referred to as a film scanner. This tool is quite high quality and is designed for narrow profile applications.