Skip to main content

WHAT IS SCANNER AND DIFFERENT TYPES OF SCANNER?

WHAT IS SCANNER AND DIFFERENT TYPES OF SCANNER?

Scanner is device use to scan document and images and convert it into digital format.


Types of scanners:
1.Flatbed scanner
2.Sheet-fed scanner
3.Handheld scanner
4.Drum scanner


Flatbed scanners are desktop scanners.
Parts of flatbed scanner:
1.Charge coupled device (CCD) array
2.Mirrors
3.Scan head
4.Lens
5.Filters
6.Interface ports
7.Control circuitry
The core component of scanner is CCD array.CCD is technology for image capture in scanners.
CCD is collection of tiny light sensitive diodes,which converts light into electric charge.
The image of document that we scan reaches the CCD array through a series of mirrors,filters and lenses.


Sheet-fed scanners are similar to flatbed scanners except that the document is moved and the scan head is immobile.


Handheld scanners use same basic technology as a flatbed scanner,but depends on the user to move them.
This type of scanner does not provide good image quality.


Drum scanners are very powerful.They use technology called a photomultiplier tube(PMT).
In PMT,the document to be scanned is mounted on a glass cylinder.
At the center of the cylinder is a sensor that splits light bounced from the document into three beams.
Each beam is sent through a colour filter into PMT where the light is changed into an electric signal.   

           
               FOR MORE INFORMATION WATCH THE BELOW VIDEO
                    

Comments

Post a Comment

Popular posts from this blog

Stop Losing Your Best ChatGPT Prompts: A Guide to AI Prompt Vault

Stop Losing Your Best ChatGPT Prompts: A Guide to AI Prompt Vault Did you know that the average AI power user spends nearly two hours a week just searching for, refining, or trying to remember prompts they have used in the past? With millions of people relying on tools like ChatGPT, Claude, and Gemini daily, the friction of interacting with AI is not the technology itself—it is prompt management. You might spend twenty minutes tweaking a prompt to get the exact tone and structure you need for a blog post or a block of code. It works perfectly. But a week later, when you need to perform the exact same task, that winning prompt is buried beneath dozens of other chat threads. You are forced to start from scratch. This constant cycle of recreating the wheel drains your productivity and makes working with artificial intelligence feel like a chore rather than a shortcut. That is precisely the problem we need to solve to truly unlock the potential of these tools. What is AI Prompt Vault? T...
Post a Comment
Read more

How to Save Hours of AI Work with AI Prompt Vault -AI Helper Pro

How to Save Hours of AI Work with AI Prompt Vault -AI Helper Pro Recent studies in digital productivity reveal that professionals using generative AI spend up to thirty percent of their active work time simply rewriting, searching for, or recreating prompts they have already used. As generative AI becomes a staple in daily workflows, the friction of losing a highly optimized prompt is a growing hurdle. Copying prompts into generic notes apps or messy spreadsheets often leads to clutter, and when you are offline or working on the go, retrieving those crucial inputs becomes impossible. This constant trial-and-error cycle drains creative energy and fractures your focus. AI Prompt Vault -AI Helper Pro was created to solve this specific challenge, providing a reliable, structured, and fast way to keep your best prompts at your fingertips. You can learn more about this tool on its Google Play page . What is AI Prompt Vault -AI Helper Pro? AI Prompt Vault -AI Helper Pro is a dedicated, p...
Post a Comment
Read more

Journey into creating a privacy-first period tracking solution that puts users in control.

Introduction As a developer passionate about women's health and digital privacy, I noticed a concerning trend: most period tracking apps require accounts, store sensitive data on servers, or bombard users with ads. That's why I built Period Tracker - a free, private, and accessible solution that keeps your data where it belongs: with you. The Core Features Period Tracker  offers everything you need for comprehensive menstrual tracking: Personalized cycle predictions based on your unique patterns Ovulation and fertility window calculations Local browser storage for complete privacy PDF export and print-ready calendars Simple, intuitive interface with no login required Why It Matters In a post-Roe world, period tracking privacy isn't just a feature - it's a fundamental right. By storing data locally in your browser,  Period Tracker  ensures your sensitive health information remains under your control. No accounts, no servers, no data sharing - just accurate t...
Post a Comment
Read more