Optional equipment. Types of scanners

Rapid development of digital technologiesgreatly 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.

Inseparable attribute of office equipment becamescanner. 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, various types of scanners appeared.

The most common and usual for usare 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 are different from tabletlack 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, a narrow scanning band. Due to manual scanning, image skews may occur.

Laminating scanners slightly improve the qualitydisplay of the object, since the sheet to be scanned is inserted into the corresponding 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 objectscanning has led to that types of scanners have replenished with planetary scanners used to work 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 prints. Scanning is printed side up. The operator's job is to turn the pages of a standard page as in a normal reading.

Book types of scanners can also haveV-shaped cradle and work with the technology of digital cameras. With all the advantages of planetary scanners, they scan the book completely without revealing it, providing a so-called gentle scan 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 onlycopy printed publications. In the trading enterprises, barcode readers are 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.

Use of additional modules allowsConventional 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. This scanner is referred to as a film scanner. This tool is of a rather high quality and is intended for narrow profile applications.