charge-coupled device

(redirected from CCD imaging)
Also found in: Dictionary, Medical.

charge-coupled device

See CCD.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

charge-coupled device

[′chärj ¦kəp·əld di′vīs]
A semiconductor device wherein minority charge is stored in a spatially defined depletion region (potential well) at the surface of a semiconductor and is moved about the surface by transferring this charge to similar adjacent wells. Abbreviated CCD.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

charge-coupled device

(CCD) A semiconductor technology used to build light-sensitive electronic devices such as cameras and image scanners. CCDs can be made to detect either colour or black-and-white. Each CCD chip consists of an array of light-sensitive photocells. The photocell is sensitised by giving it an electrical charge prior to exposure.
This article is provided by FOLDOC - Free Online Dictionary of Computing (

CCD sensor

(Charge-Coupled Device sensor) An electronic memory that records the intensity of light as a variable charge. Although mostly replaced by CMOS sensors to capture images in cameras, camcorders and scanners, CCDs are still used in astronomy, microscopy and biomedical imaging because of their excellent sensitivity during long exposures.

CCDs are analog devices. Their charges equate to shades of light for monochrome images or shades of red, green and blue when used with color filters. Devices may use three CCDs, one for each of the red, green and blue colors.

Why Coupled?
The CCD comprises an array of imaging pixels and a matching array of storage pixels that are coupled together. After the imaging array is exposed to light, its charges are quickly transferred to the storage array. While the imaging CCDs are being exposed to the next picture, the storage CCDs from the last picture are being read out a row at a time to the analog-to-digital converters (A/D converters) that transform the voltages into binary data to be processed. Contrast with CMOS sensor. See Bayer pattern, X3, Super CCD, blooming and digital camera.

Charge-Coupling Methods
The storage CCDs are either a separate array (frame transfer) or individual photosites (interline transfer) coupled to each imaging photosite. The charges can be transferred faster with the interline method because each storage component is closer to its imaging counterpart.

CCDs Record Light
In a camera, CCDs take the place of film. They are exposed to light, recording the intensities, or shades, of light as variable charges. In the digital camera above, the variable, analog charges in the CCD are converted to binary data by analog-to-digital converter chips.

CCDs Are Sensitive
This CCD from Jet Propulsion Labs is used in astronomy. Sensing the output of telescopes, it detects ultraviolet light from distant planets. (Image courtesy of JPL's Microdevices Laboratory; Robert M. Brown, photographer)
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
In evaluating the comparison between the disperGRADER and ConCarb methods, it was found that by using a Leigh-Dugmore formula and CCD imaging, similar results were able to be generated, regardless of the great difference in sample preparation and test method.
TELECOMWORLDWIRE-(C) 1994-9 M2 COMMUNICATIONS LTD Analog Devices Inc has released the AD9814 family of, 3- channel, 14-bit, 10-MSPS analog signal processors for CCD imaging applications.
The system incorporates the CCD imaging technology that GSI gained from the acquisition of a BioPhotonics' business, as well as the robotics technology gained from the PBA Technology acquisition.
Attention to detail is essential to the art and science of deep-sky CCD imaging. But if you're thinking about getting started collecting your own photons, I have good news.
This is designed to provide opportunities for useful work for members using telescopes and CCD imaging, as well as the imagery and visualisation tools now becoming available to the astronomical community as a result of recent lunar probes, and it was drawn up after wide consultation.
Ruben Kier is the author of The 100 Best Astrophotography Targets: A Monthly Guide for CCD Imaging with Amateur Telescopes.
Not content just to draw observations in white light and H-alpha, Eric started recording his observations using emulsion film, but as soon as the digital era arrived, Eric was among the first to begin CCD imaging. In recognition of his solar work and contributions to the BAA solar observing programme, Eric was awarded the Merlin Medal in 1999.
Astro-imagers looking for interesting targets will enjoy The 100 Best Astrophotography Targets: A Monthly Guide for CCD Imaging with Amateur Telescopes by Ruben Kier ($34.95).
THE BIGGEST STARSHOOT The new StarShoot Pro Deep Space CCD Color Imaging Camera ($1,299.95) from Orion Telescopes & Binoculars brings a breakthrough price point to single-shot color CCD imaging. This camera features a Sony 6.1-megapixel CCD having an array of 7.8-micron pixels measuring 23.4 mm by 15.6 mm (the same size in today's popular DSLR cameras).