Scanners and Reading Devices
How does a flatbed scanner work?
p. 253 Fig. 5-33
Next
Step 2. Bright light moves
underneath
scanned document.
scanned document.
Step 3. Image of the document
is
reflected into a series of mirrors.
reflected into a series of mirrors.
Step 1. Document to be scanned
is
placed face down on the glass window.
placed face down on the glass window.
Step 6. Users can print image,
e-mail it, include it in a document, or place it on a Web page.
e-mail it, include it in a document, or place it on a Web page.
Step 4. Light is converted to analog electrical current that
is
converted to digital signal by an analog-to-digital converter (ADC).
Step 5. Digital information is
sent to memory in the computer to be used by illustration, desktop
publishing, or other software; or it is stored on disk.
