Kinematic mechanism - Informatics

Kinematic mechanism

This characteristic specifies how to move the scanner and paper scanner head relative to each other. There are two main classes of scanners of this group:

hand scanners (Hand Held), by which scanning is performed manually by sequentially moving the scanner relative to the original. They have a sensor and a light source in a small case about 10-12 cm wide. Entering into the computer data from the scanner output is converted into a digital form for subsequent software processing. In some models of manual scanners, the operation of stitching (Merge) of neighboring scanning areas is provided. One of the main advantages of a handheld scanner is the wide choice of the original. Its shortcomings include the limited width of the scan area and the distortion of the scanned image, due to the inconsistent speed of the scanner relative to the original;

desktop scanners.

The last class includes:

flatbed scanners, in which the scanning head moves relative to the paper with the help of a stepper motor;

drum scanners, in which the original is attached to a transparent rotating ram, and the scanning sensor located next to it reads the image through the conical aperture;

Roller or sheet scanners, in which rollers serve as the feed mechanism for the original. A sensor array is used to read the data. Almost all such scanners operate in two modes: scanning the image and its facsimile (phototelegraph) transmission, so they are sometimes called fax scanners. The advantage of roller scanners is their compactness and low cost, and the disadvantages are the complexity of aligning the originals and the possibility of their damage, the inconvenience of working with sheets of different sizes, etc.;

• Projection scanners in which the original is placed on a stand placed under the scanning head at a distance (~ 30 cm), with the image facing up. The design of the scanner resembles a photo intensifier or a projection device using natural light. Scanning is performed by turning the sensor inside the head along each read line of the original. The merits of projecting scanners include a small area occupied by them, the convenience of aligning the original, the possibility of using their various forms (including three-dimensional ones) and combining flat and three-dimensional originals; to the disadvantages - dependence on the source of external illumination; restrictions on the size of the original and the difficulty in arranging non-standard originals.

thematic pictures

Also We Can Offer!

Other services that we offer

If you don’t see the necessary subject, paper type, or topic in our list of available services and examples, don’t worry! We have a number of other academic disciplines to suit the needs of anyone who visits this website looking for help.

How to ...

We made your life easier with putting together a big number of articles and guidelines on how to plan and write different types of assignments (Essay, Research Paper, Dissertation etc)