Scanners can be used as scanning objects for photos, text pages, drawings, art drawings, photographic film, film film, and even textile, signage panels, printed board samples, etc., to extract and original lines, graphics, text, photos The planar object is converted into a device that can be edited and added to the file. Since its inception, scanners have come in a variety of varieties and are constantly evolving.
1. Platform scanner Advantages: Scanning speed is fast, quality is good, the most commonly used scanner. Disadvantages: Large size and limit the area of scanned files. Generally it is A4 size.
2. Drum-type scanner Advantages: Upright design, can handle files of various sizes. Disadvantages: slower than the platform, and more careful placement. Suitable for annual reports and some fine art reproductions.
3. Portable scanner Advantages: convenient. Disadvantages: Only a few lines of text or parts of a picture can be processed at a time, and only black and white.
4. Photo Scanner Advantages: High image quality is a substitute for digital cameras. Disadvantages: Only photos can be processed. It is usually a scanner that you want to save on your computer after you have taken photos with Film. The image quality is very high.
5. Negative film scanner Advantages: Can produce the highest quality photo images. Disadvantages: A flatbed scanner equipped with a film scanning device is cheaper and more practical than it. As the name suggests, it is a scanner for scanning negatives. It is an important tool for digital imagery with digital cameras and flatbed scanners, and is often used in professional fields where image requirements are high.
6. Business card scanner Disadvantages: limited use. Three-dimensional objects can be used as scanning objects to extract and convert original lines, graphics, text, photos, and planar objects into devices that can be edited and added to a file. Since its inception, scanners have come in a variety of varieties and are constantly evolving.
A brief history of the development of various types of scanners
Although the market for scanners is increasingly quiet, it is a must-have for many users. For many users who are facing purchases, how to better purchase scanners, what is the development trend of scanners, and whether the development of scanner technology is mature or not, all need to be considered and clarified.
In 1884, German engineer Paul Gottlieb Nipkow invented a mechanical scanning device using a selenium photocell, which was used in later early television systems, and by 1939 the mechanical scanning system was eliminated. Although there is no necessary connection with a scanner that is operated by a computer more than 100 years later, this is the earliest scanning technique used in human history from a historical perspective.
The scanner was an opto-mechatronics that emerged in the mid-1980s and consisted of a scanning head, control circuitry, and mechanical components. Taking a progressive scan, the resulting digital signal is saved in a dot matrix, and then edited into a standard formatted text using a file editing software and stored on a disk. Since its inception, scanners have come in a variety of varieties and are constantly evolving. Below, let's take a look at the variety of scanners:
1, handheld scanner
Born in 1987, the scanning format is narrow, it is difficult to operate and capture accurate images, and the scanning effect is also poor. After 1996, scanner manufacturers stopped production, and handheld scanners disappeared. By 2002, with the continuous maturity of CIS technology, 3R Group first launched the Planon model RC800 handheld scanner on the market, which can scan A4 amplitude, scan resolution 300DPI, which is the scanner at that time. The biggest bright spot on the market; by 2009, with the increasing popularity of all-in-ones, it swallowed the market for traditional desktop scanners, with handheld scanners with a small, lightweight design and scanning resolutions up to 600dpi. Subverting the image of the traditional scanners that have been difficult to move and lag behind, leading an office revolution across the era.
2, paper-feeding scanner
Born in the early 1990s, these scanners also withdrew from the historical arena after 1997.
3, drum scanner
Also known as the drum scanner, it is the most widely used scanner in the field of professional printing and typesetting. The photosensitive device is a photomultiplier tube.
4, flatbed scanner
Also known as flatbed scanners, desktop scanners, this scanner was born in 1984, is the mainstream of office scanners. The scanning format is generally A4 or A3.
5, large format scanner
Generally refers to a scanner that scans the A1 and A0 formats, also known as an engineering drawing scanner.
6, film scanner
Also known as film scanners, optical resolution can generally reach 2700ppi.
7, other scanners
In addition, some scanners are used in professional fields, such as barcode scanners, physical scanners, and card scanners.