VIDEO

Video cameras are small television cameras that can capture images on a portable recording device, such as an in-built tape or the camera’s digital memory. Television pictures were not often recorded until 1956, when the first practical videotape machine was invented. Now compact cameras are used to capture the latest news from all around the world, family holidays, and special occasions.

HOME CAMCORDER

Home cameras have become smaller and smaller as microelectronics has produced better chips and compact image sensors. Early camcorders used cathode ray tubes both to form the image and to display it. Now, most use CCD (charge-coupled device) sensors and colour liquid crystal displays (LCDs).

PROFESSIONAL VIDEO

Professional cameras use wider tape to capture more detail. Their high-quality lenses and tough bodies allow broadcasters to record or transmit excellent images from almost anywhere. The latest cameras record images in digital form, which uses half the amount of tape because unnecessary information is not recorded.

CCD SENSOR

The heart of a modern video camera is its CCD (charge-coupled device) sensor. This microchip turns an image from the camera lens into a electrical signal. Thousands of tiny, light-sensitive elements on the sensor’s surface charge up with electricity when they are exposed to the image. Each element then transfers its electrical charge to its neighbour until the all the charges that form the image have been read out in sequence.

FIND OUT MORE

Cameras
Microelectronics

Copyright © 2007 Dorling Kindersley

stay connected

Sign up for our free email newsletters and receive the latest advice and information on all things parenting.

Enter your email address to sign up or manage your account.

Facebook icon Twitter icon Follow Us on Pinterest

editor’s picks

highlights

Join BIC on our mission to save handwriting and Fight For Your Write! Writing helps kids become better readers, boosts their confidence and sparks their creativity. Visit BICFightForYourWrite.com to sign our petition to save handwriting!

7 Fun Driveway and Sidewalk Games for Kids
Looking for classic outdoor games kids can play in the driveway or on the sidewalk, just like the good ol' days? From hopscotch to bubble-blowing contests, there's something for all ages!

Kindergarten Readiness App Wins Gold
Our Kindergarten Readiness app won the Gold Award of Excellence in the educational category at the 2014 Communicator Awards. This valuable checklist comes with games and activities to help your child practice the essential skills she needs for kindergarten. Download the Kindergarten Readiness app today!

Best Sun Safety Practices for Babies
Follow these sun safety practices for babies to ensure your little one stays safe on the beach and on sunny days all year long.