The document provides an overview of scanners, electronic devices that convert printed or handwritten text and images into digital formats. It describes various types of scanners, including flatbed, hand-held, sheet-fed, drum, and portable scanners, along with their specific features and components. Additionally, the document includes a self-check section with questions related to the types and parts of scanners.

1. SCANNER – ELECTRONIC DEVICE THAT SCANS PRINTED OR
HANDWRITTEN TEXT, DOCUMENTS, IMAGES OR CERTAIN
OBJECTS AND CONVERTS THEM INTO A DIGITAL FILE
FORMAT. ONCE AN OBJECT IS BEING SCANNED, IT CAN BE
DISPLAYED ON THE SCREEN, STORED IN THE STORAGE
MEDIUM, PRINTED, FAXED, ATTACHED AS AN E-MAIL
MESSAGE, INCLUDED IN ANOTHER DOCUMENT AND POSTED
ON A WEB SITE OR PHOTO COMMUNITY FOR EVERYONE TO
SEE.

2. TYPES OF SCANNERS
1. FLATBED SCANNER – to scan single sheets of paper
& pages from a book. Work similar to a photocopier
machine except that it creates a file of a document in
a memory instead of producing a paper copy.
Sometimes called reflective scanner.

3. PARTS OF A
FLATBED SCANNER
•FITTERS
•INTERFACE PARTS
•CONTROL CIRCUITRY
CCDA – (Charge Couple Device Array) – Core
component of the scanner
•MIRROR
•SCAN HEAD
•LENS

4. 2. HAND-HELD SCANNER – usually has a
scanning width of approximately 4 inches and is
useful for copying small images such as
signature logos and small photograph. Ex.
Barcode scanner – used in shopping stores to
evaluate goods.

5. 3. SHEETFEED SCANNER – smaller than a flatbed
scanner .
- Ideal for scanning single page documents.
PARTS OF A SHEETFEED SCANNER
A.SHEET-FEEDER
B.SCANNING MODULE
C.CALIBRATION SHEET

6. 4. DRUM SCANNER – used mainly for capturing a
picture and producing at a very high resolution
rate. It uses photomultiplier tube (PMT) to scan
images instead of charge-coupled device.

7. 5. PORTABLE SCANNER – design to capture text and
other data while you are on the go.
- powered by batteries
- can easily carry around
- great help when it comes to text document
scanning.

8. SELF – CHECK
Identify what is being describe
1. A type of scanner similar to a photocopier.
2. Give at least three examples of short images.
3. It is sometimes called reflective scanner.
4. What are the parts of a sheet-fed scanner?
5. It is a type of scanner that is powered by batteries.
6. It is a hand-held scanner used to evaluate goods.
7. It looks like a miniature printer with a flip up cover.
8. An electronic device that converts documents into a digital
format.
9. What are the parts of a flatbed scanner?
10. What kind of scanner that uses photomultiplier tube?